try to add tahoma functionality--> RAM overflow -->removed Tahome for now

Raumtermostat/lib/ESPAsyncWebServer/.clang-format

@@ -0,0 +1,246 @@
+# Clang format version: 18.1.3
+---
+BasedOnStyle: LLVM
+AccessModifierOffset: -2
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+AlwaysBreakAfterReturnType: None
+AlwaysBreakBeforeMultilineStrings: false
+AlwaysBreakTemplateDeclarations: MultiLine
+AttributeMacros:
+  - __capability
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+BinPackParameters: true
+BitFieldColonSpacing: Both
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+  AfterClass: false
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+  SplitEmptyFunction: false
+  SplitEmptyRecord: true
+  SplitEmptyNamespace: true
+BreakAdjacentStringLiterals: true
+BreakAfterAttributes: Always
+BreakAfterJavaFieldAnnotations: false
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+BreakBeforeBinaryOperators: NonAssignment
+BreakBeforeBraces: Custom
+BreakBeforeConceptDeclarations: Always
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+ExperimentalAutoDetectBinPacking: false
+FixNamespaceComments: true
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+  - foreach
+  - Q_FOREACH
+  - BOOST_FOREACH
+IfMacros:
+  - KJ_IF_MAYBE
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+IncludeCategories:
+  - Regex: ^"(llvm|llvm-c|clang|clang-c)/
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+    SortPriority: 0
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+  AfterIfMacros: true
+  AfterOverloadedOperator: true
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+  Maximum: -1
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+SpacesInParensOptions:
+  InConditionalStatements: false
+  InCStyleCasts: false
+  InEmptyParentheses: false
+  Other: false
+SpacesInSquareBrackets: false
+Standard: Auto
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+  - Q_EMIT
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+  - Q_UNUSED
+  - QT_REQUIRE_VERSION
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+UseTab: Never
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+WhitespaceSensitiveMacros:
+  - BOOST_PP_STRINGIZE
+  - CF_SWIFT_NAME
+  - NS_SWIFT_NAME
+  - PP_STRINGIZE
+  - STRINGIZE
+BracedInitializerIndentWidth: 2

Raumtermostat/lib/ESPAsyncWebServer/.codespellrc

@@ -0,0 +1,8 @@
+[codespell]
+# Source: https://github.com/arduino/tooling-project-assets/blob/main/workflow-templates/assets/spell-check/.codespellrc
+# In the event of a false positive, add the problematic word, in all lowercase, to a comma-separated list here:
+ignore-words-list = ba,licence,varius
+skip = ./.git,./.licenses,__pycache__,.clang-format,.codespellrc,.editorconfig,.flake8,.prettierignore,.yamllint.yml,.gitignore
+builtin = clear,informal,en-GB_to_en-US
+check-filenames =
+check-hidden =

Raumtermostat/lib/ESPAsyncWebServer/.editorconfig

@@ -0,0 +1,60 @@
+# Source: https://github.com/arduino/tooling-project-assets/blob/main/workflow-templates/assets/general/.editorconfig
+# See: https://editorconfig.org/
+# The formatting style defined in this file is the official standardized style to be used in all Arduino Tooling
+# projects and should not be modified.
+# Note: indent style for each file type is defined even when it matches the universal config in order to make it clear
+# that this type has an official style.
+
+[*]
+charset = utf-8
+end_of_line = lf
+indent_size = 2
+indent_style = space
+insert_final_newline = true
+trim_trailing_whitespace = true
+
+[*.{adoc,asc,asciidoc}]
+indent_size = 2
+indent_style = space
+
+[*.{bash,sh}]
+indent_size = 4
+indent_style = space
+
+[*.{c,cc,cp,cpp,cxx,h,hh,hpp,hxx,ii,inl,ino,ixx,pde,tpl,tpp,txx}]
+indent_size = 2
+indent_style = space
+
+[*.{go,mod}]
+indent_style = tab
+
+[*.java]
+indent_size = 2
+indent_style = space
+
+[*.{js,jsx,json,jsonc,json5,ts,tsx}]
+indent_size = 2
+indent_style = space
+
+[*.{md,mdx,mkdn,mdown,markdown}]
+indent_size = unset
+indent_style = space
+
+[*.proto]
+indent_size = 2
+indent_style = space
+
+[*.py]
+indent_size = 4
+indent_style = space
+
+[*.svg]
+indent_size = 2
+indent_style = space
+
+[*.{yaml,yml}]
+indent_size = 2
+indent_style = space
+
+[{.gitconfig,.gitmodules}]
+indent_style = tab

Raumtermostat/lib/ESPAsyncWebServer/.gitignore

@@ -0,0 +1,5 @@
+.DS_Store
+.lh
+/.pio
+/.vscode
+/logs

Raumtermostat/lib/ESPAsyncWebServer/.gitpod.Dockerfile

@@ -0,0 +1,2 @@
+FROM gitpod/workspace-python-3.11
+USER gitpod

Raumtermostat/lib/ESPAsyncWebServer/.gitpod.yml

@@ -0,0 +1,9 @@
+tasks:
+  - command: pip install --upgrade pip && pip install -U platformio && platformio run
+
+image:
+  file: .gitpod.Dockerfile
+
+vscode:
+  extensions:
+    - shardulm94.trailing-spaces

Raumtermostat/lib/ESPAsyncWebServer/.pre-commit-config.yaml

@@ -0,0 +1,42 @@
+exclude: |
+  (?x)(
+      ^\.github\/|
+      LICENSE$
+  )
+
+default_language_version:
+  # force all unspecified python hooks to run python3
+  python: python3
+
+repos:
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: "v5.0.0"
+    hooks:
+      # Generic checks
+      - id: check-case-conflict
+      - id: check-symlinks
+      - id: debug-statements
+      - id: destroyed-symlinks
+      - id: detect-private-key
+      - id: end-of-file-fixer
+        exclude: ^.*\.(bin|BIN)$
+      - id: mixed-line-ending
+        args: [--fix=lf]
+      - id: trailing-whitespace
+        args: [--markdown-linebreak-ext=md]
+        exclude: ^platformio\.ini$
+
+  - repo: https://github.com/codespell-project/codespell
+    rev: "v2.3.0"
+    hooks:
+      # Spell checking
+      - id: codespell
+        exclude: ^.*\.(svd|SVD)$
+
+  - repo: https://github.com/pre-commit/mirrors-clang-format
+    rev: "v18.1.3"
+    hooks:
+      # C/C++ formatting
+      - id: clang-format
+        types_or: [c, c++]
+        exclude: ^.*\/build_opt\.h$

Raumtermostat/lib/ESPAsyncWebServer/CMakeLists.txt

@@ -0,0 +1,9 @@
+set(COMPONENT_SRCDIRS
+    "src"
+)
+
+set(COMPONENT_ADD_INCLUDEDIRS
+    "src"
+)
+
+register_component()

Raumtermostat/lib/ESPAsyncWebServer/CODE_OF_CONDUCT.md

@@ -0,0 +1,129 @@
+
+# Contributor Covenant Code of Conduct
+
+## Our Pledge
+
+We as members, contributors, and leaders pledge to make participation in our
+community a harassment-free experience for everyone, regardless of age, body
+size, visible or invisible disability, ethnicity, sex characteristics, gender
+identity and expression, level of experience, education, socioeconomic status,
+nationality, personal appearance, race, religion, or sexual identity
+and orientation.
+
+We pledge to act and interact in ways that contribute to an open, welcoming,
+diverse, inclusive, and healthy community.
+
+## Our Standards
+
+Examples of behavior that contributes to a positive environment for our
+community include:
+
+* Demonstrating empathy and kindness toward other people
+* Being respectful of differing opinions, viewpoints, and experiences
+* Giving and gracefully accepting constructive feedback
+* Accepting responsibility and apologizing to those affected by our mistakes,
+  and learning from the experience
+* Focusing on what is best not just for us as individuals, but for the
+  overall community
+
+Examples of unacceptable behavior include:
+
+* The use of sexualized language or imagery, and sexual attention or
+  advances of any kind
+* Trolling, insulting or derogatory comments, and personal or political attacks
+* Public or private harassment
+* Publishing others' private information, such as a physical or email
+  address, without their explicit permission
+* Other conduct which could reasonably be considered inappropriate in a
+  professional setting
+
+## Enforcement Responsibilities
+
+Community leaders are responsible for clarifying and enforcing our standards of
+acceptable behavior and will take appropriate and fair corrective action in
+response to any behavior that they deem inappropriate, threatening, offensive,
+or harmful.
+
+Community leaders have the right and responsibility to remove, edit, or reject
+comments, commits, code, wiki edits, issues, and other contributions that are
+not aligned to this Code of Conduct, and will communicate reasons for moderation
+decisions when appropriate.
+
+## Scope
+
+This Code of Conduct applies within all community spaces, and also applies when
+an individual is officially representing the community in public spaces.
+Examples of representing our community include using an official e-mail address,
+posting via an official social media account, or acting as an appointed
+representative at an online or offline event.
+
+## Enforcement
+
+Instances of abusive, harassing, or otherwise unacceptable behavior may be
+reported to the community leaders responsible for enforcement at
+https://sidweb.nl/cms3/en/contact.
+All complaints will be reviewed and investigated promptly and fairly.
+
+All community leaders are obligated to respect the privacy and security of the
+reporter of any incident.
+
+## Enforcement Guidelines
+
+Community leaders will follow these Community Impact Guidelines in determining
+the consequences for any action they deem in violation of this Code of Conduct:
+
+### 1. Correction
+
+**Community Impact**: Use of inappropriate language or other behavior deemed
+unprofessional or unwelcome in the community.
+
+**Consequence**: A private, written warning from community leaders, providing
+clarity around the nature of the violation and an explanation of why the
+behavior was inappropriate. A public apology may be requested.
+
+### 2. Warning
+
+**Community Impact**: A violation through a single incident or series
+of actions.
+
+**Consequence**: A warning with consequences for continued behavior. No
+interaction with the people involved, including unsolicited interaction with
+those enforcing the Code of Conduct, for a specified period of time. This
+includes avoiding interactions in community spaces as well as external channels
+like social media. Violating these terms may lead to a temporary or
+permanent ban.
+
+### 3. Temporary Ban
+
+**Community Impact**: A serious violation of community standards, including
+sustained inappropriate behavior.
+
+**Consequence**: A temporary ban from any sort of interaction or public
+communication with the community for a specified period of time. No public or
+private interaction with the people involved, including unsolicited interaction
+with those enforcing the Code of Conduct, is allowed during this period.
+Violating these terms may lead to a permanent ban.
+
+### 4. Permanent Ban
+
+**Community Impact**: Demonstrating a pattern of violation of community
+standards, including sustained inappropriate behavior,  harassment of an
+individual, or aggression toward or disparagement of classes of individuals.
+
+**Consequence**: A permanent ban from any sort of public interaction within
+the community.
+
+## Attribution
+
+This Code of Conduct is adapted from the [Contributor Covenant][homepage],
+version 2.0, available at
+https://www.contributor-covenant.org/version/2/0/code_of_conduct.html.
+
+Community Impact Guidelines were inspired by [Mozilla's code of conduct
+enforcement ladder](https://github.com/mozilla/diversity).
+
+[homepage]: https://www.contributor-covenant.org
+
+For answers to common questions about this code of conduct, see the FAQ at
+https://www.contributor-covenant.org/faq. Translations are available at
+https://www.contributor-covenant.org/translations.

Raumtermostat/lib/ESPAsyncWebServer/LICENSE

@@ -0,0 +1,165 @@
+                   GNU LESSER GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+
+  This version of the GNU Lesser General Public License incorporates
+the terms and conditions of version 3 of the GNU General Public
+License, supplemented by the additional permissions listed below.
+
+  0. Additional Definitions.
+
+  As used herein, "this License" refers to version 3 of the GNU Lesser
+General Public License, and the "GNU GPL" refers to version 3 of the GNU
+General Public License.
+
+  "The Library" refers to a covered work governed by this License,
+other than an Application or a Combined Work as defined below.
+
+  An "Application" is any work that makes use of an interface provided
+by the Library, but which is not otherwise based on the Library.
+Defining a subclass of a class defined by the Library is deemed a mode
+of using an interface provided by the Library.
+
+  A "Combined Work" is a work produced by combining or linking an
+Application with the Library.  The particular version of the Library
+with which the Combined Work was made is also called the "Linked
+Version".
+
+  The "Minimal Corresponding Source" for a Combined Work means the
+Corresponding Source for the Combined Work, excluding any source code
+for portions of the Combined Work that, considered in isolation, are
+based on the Application, and not on the Linked Version.
+
+  The "Corresponding Application Code" for a Combined Work means the
+object code and/or source code for the Application, including any data
+and utility programs needed for reproducing the Combined Work from the
+Application, but excluding the System Libraries of the Combined Work.
+
+  1. Exception to Section 3 of the GNU GPL.
+
+  You may convey a covered work under sections 3 and 4 of this License
+without being bound by section 3 of the GNU GPL.
+
+  2. Conveying Modified Versions.
+
+  If you modify a copy of the Library, and, in your modifications, a
+facility refers to a function or data to be supplied by an Application
+that uses the facility (other than as an argument passed when the
+facility is invoked), then you may convey a copy of the modified
+version:
+
+   a) under this License, provided that you make a good faith effort to
+   ensure that, in the event an Application does not supply the
+   function or data, the facility still operates, and performs
+   whatever part of its purpose remains meaningful, or
+
+   b) under the GNU GPL, with none of the additional permissions of
+   this License applicable to that copy.
+
+  3. Object Code Incorporating Material from Library Header Files.
+
+  The object code form of an Application may incorporate material from
+a header file that is part of the Library.  You may convey such object
+code under terms of your choice, provided that, if the incorporated
+material is not limited to numerical parameters, data structure
+layouts and accessors, or small macros, inline functions and templates
+(ten or fewer lines in length), you do both of the following:
+
+   a) Give prominent notice with each copy of the object code that the
+   Library is used in it and that the Library and its use are
+   covered by this License.
+
+   b) Accompany the object code with a copy of the GNU GPL and this license
+   document.
+
+  4. Combined Works.
+
+  You may convey a Combined Work under terms of your choice that,
+taken together, effectively do not restrict modification of the
+portions of the Library contained in the Combined Work and reverse
+engineering for debugging such modifications, if you also do each of
+the following:
+
+   a) Give prominent notice with each copy of the Combined Work that
+   the Library is used in it and that the Library and its use are
+   covered by this License.
+
+   b) Accompany the Combined Work with a copy of the GNU GPL and this license
+   document.
+
+   c) For a Combined Work that displays copyright notices during
+   execution, include the copyright notice for the Library among
+   these notices, as well as a reference directing the user to the
+   copies of the GNU GPL and this license document.
+
+   d) Do one of the following:
+
+       0) Convey the Minimal Corresponding Source under the terms of this
+       License, and the Corresponding Application Code in a form
+       suitable for, and under terms that permit, the user to
+       recombine or relink the Application with a modified version of
+       the Linked Version to produce a modified Combined Work, in the
+       manner specified by section 6 of the GNU GPL for conveying
+       Corresponding Source.
+
+       1) Use a suitable shared library mechanism for linking with the
+       Library.  A suitable mechanism is one that (a) uses at run time
+       a copy of the Library already present on the user's computer
+       system, and (b) will operate properly with a modified version
+       of the Library that is interface-compatible with the Linked
+       Version.
+
+   e) Provide Installation Information, but only if you would otherwise
+   be required to provide such information under section 6 of the
+   GNU GPL, and only to the extent that such information is
+   necessary to install and execute a modified version of the
+   Combined Work produced by recombining or relinking the
+   Application with a modified version of the Linked Version. (If
+   you use option 4d0, the Installation Information must accompany
+   the Minimal Corresponding Source and Corresponding Application
+   Code. If you use option 4d1, you must provide the Installation
+   Information in the manner specified by section 6 of the GNU GPL
+   for conveying Corresponding Source.)
+
+  5. Combined Libraries.
+
+  You may place library facilities that are a work based on the
+Library side by side in a single library together with other library
+facilities that are not Applications and are not covered by this
+License, and convey such a combined library under terms of your
+choice, if you do both of the following:
+
+   a) Accompany the combined library with a copy of the same work based
+   on the Library, uncombined with any other library facilities,
+   conveyed under the terms of this License.
+
+   b) Give prominent notice with the combined library that part of it
+   is a work based on the Library, and explaining where to find the
+   accompanying uncombined form of the same work.
+
+  6. Revised Versions of the GNU Lesser General Public License.
+
+  The Free Software Foundation may publish revised and/or new versions
+of the GNU Lesser General Public License from time to time. Such new
+versions will be similar in spirit to the present version, but may
+differ in detail to address new problems or concerns.
+
+  Each version is given a distinguishing version number. If the
+Library as you received it specifies that a certain numbered version
+of the GNU Lesser General Public License "or any later version"
+applies to it, you have the option of following the terms and
+conditions either of that published version or of any later version
+published by the Free Software Foundation. If the Library as you
+received it does not specify a version number of the GNU Lesser
+General Public License, you may choose any version of the GNU Lesser
+General Public License ever published by the Free Software Foundation.
+
+  If the Library as you received it specifies that a proxy can decide
+whether future versions of the GNU Lesser General Public License shall
+apply, that proxy's public statement of acceptance of any version is
+permanent authorization for you to choose that version for the
+Library.

Raumtermostat/lib/ESPAsyncWebServer/README.md

@@ -0,0 +1,141 @@
+![https://avatars.githubusercontent.com/u/195753706?s=96&v=4](https://avatars.githubusercontent.com/u/195753706?s=96&v=4)
+
+# ESPAsyncWebServer
+
+[![Latest Release](https://img.shields.io/github/release/ESP32Async/ESPAsyncWebServer.svg)](https://GitHub.com/ESP32Async/ESPAsyncWebServer/releases/)
+[![PlatformIO Registry](https://badges.registry.platformio.org/packages/ESP32Async/library/ESPAsyncWebServer.svg)](https://registry.platformio.org/libraries/ESP32Async/ESPAsyncWebServer)
+
+[![License: LGPL 3.0](https://img.shields.io/badge/License-LGPL%203.0-yellow.svg)](https://opensource.org/license/lgpl-3-0/)
+[![Contributor Covenant](https://img.shields.io/badge/Contributor%20Covenant-2.1-4baaaa.svg)](code_of_conduct.md)
+
+[![GitHub latest commit](https://badgen.net/github/last-commit/ESP32Async/ESPAsyncWebServer)](https://GitHub.com/ESP32Async/ESPAsyncWebServer/commit/)
+[![Gitpod Ready-to-Code](https://img.shields.io/badge/Gitpod-Ready--to--Code-blue?logo=gitpod)](https://gitpod.io/#https://github.com/ESP32Async/ESPAsyncWebServer)
+
+[![ESP32Async Discord Server](https://img.shields.io/badge/Discord-ESP32Async-blue?logo=discord)](https://discord.gg/X7zpGdyUcY)
+
+[![Documentation](https://img.shields.io/badge/Wiki-ESPAsyncWebServer-blue?logo=github)](https://github.com/ESP32Async/ESPAsyncWebServer/wiki)
+
+## Asynchronous HTTP and WebSocket Server Library for ESP32, ESP8266, RP2040 and RP2350
+
+Supports: WebSocket, SSE, Authentication, Arduino Json 7, File Upload, Static File serving, URL Rewrite, URL Redirect, etc.
+
+- [Documentation](#documentation)
+- [How to install](#how-to-install)
+- [Dependencies](#dependencies)
+  - [ESP32 / pioarduino](#esp32--pioarduino)
+  - [ESP8266 / pioarduino](#esp8266--pioarduino)
+  - [Unofficial dependencies](#unofficial-dependencies)
+
+## Documentation
+
+The complete [project documentation](https://github.com/ESP32Async/ESPAsyncWebServer/wiki) is available in the Wiki section.
+
+## How to install
+
+The library can be downloaded from the releases page at [https://github.com/ESP32Async/ESPAsyncWebServer/releases](https://github.com/ESP32Async/ESPAsyncWebServer/releases).
+
+It is also deployed in these registries:
+
+- Arduino Library Registry: [https://github.com/arduino/library-registry](https://github.com/arduino/library-registry)
+
+- ESP Component Registry [https://components.espressif.com/components/esp32async/espasyncwebserver](https://components.espressif.com/components/esp32async/espasyncwebserver)
+
+- PlatformIO Registry: [https://registry.platformio.org/libraries/esp32async/ESPAsyncWebServer](https://registry.platformio.org/libraries/esp32async/ESPAsyncWebServer)
+
+  - Use: `lib_deps=ESP32Async/ESPAsyncWebServer` to point to latest version
+  - Use: `lib_deps=ESP32Async/ESPAsyncWebServer @ ^<x.y.z>` to point to latest version with the same major version
+  - Use: `lib_deps=ESP32Async/ESPAsyncWebServer @ <x.y.z>` to always point to the same version (reproductible build)
+
+## Dependencies
+
+### ESP32 / pioarduino
+
+```ini
+[env:stable]
+platform = https://github.com/pioarduino/platform-espressif32/releases/download/stable/platform-espressif32.zip
+lib_compat_mode = strict
+lib_ldf_mode = chain
+lib_deps =
+  ESP32Async/AsyncTCP
+  ESP32Async/ESPAsyncWebServer
+```
+
+### ESP8266 / pioarduino
+
+```ini
+[env:stable]
+platform = espressif8266
+lib_compat_mode = strict
+lib_ldf_mode = chain
+lib_deps =
+  ESP32Async/ESPAsyncTCP
+  ESP32Async/ESPAsyncWebServer
+```
+
+### Unofficial dependencies
+
+**AsyncTCPSock**
+
+AsyncTCPSock can be used instead of AsyncTCP by excluding AsyncTCP from the library dependencies and adding AsyncTCPSock instead:
+
+```ini
+lib_compat_mode = strict
+lib_ldf_mode = chain
+lib_deps =
+  https://github.com/ESP32Async/AsyncTCPSock/archive/refs/tags/v1.0.3-dev.zip
+  ESP32Async/ESPAsyncWebServer
+lib_ignore =
+  AsyncTCP
+  ESP32Async/AsyncTCP
+```
+
+**RPAsyncTCP**
+
+RPAsyncTCP replaces AsyncTCP to provide support for RP2040(+WiFi) and RP2350(+WiFi) boards. For example - Raspberry Pi Pico W and Raspberry Pi Pico 2W.
+
+```ini
+lib_compat_mode = strict
+lib_ldf_mode = chain
+platform = https://github.com/maxgerhardt/platform-raspberrypi.git
+board = rpipicow
+board_build.core = earlephilhower
+lib_deps =
+  ayushsharma82/RPAsyncTCP@^1.3.2
+  ESP32Async/ESPAsyncWebServer
+lib_ignore =
+  lwIP_ESPHost
+build_flags = ${env.build_flags}
+  -Wno-missing-field-initializers
+```
+
+## Important recommendations for build options
+
+Most of the crashes are caused by improper use or configuration of the AsyncTCP library used for the project.
+Here are some recommendations to avoid them and build-time flags you can change.
+
+`CONFIG_ASYNC_TCP_MAX_ACK_TIME` - defines a timeout for TCP connection to be considered alive when waiting for data.
+In some bad network conditions you might consider increasing it.
+
+`CONFIG_ASYNC_TCP_QUEUE_SIZE` - defines the length of the queue for events related to connections handling.
+Both the server and AsyncTCP library were optimized to control the queue automatically. Do NOT try blindly increasing the queue size, it does not help you in a way you might think it is. If you receive debug messages about queue throttling, try to optimize your server callbacks code to execute as fast as possible.
+Read #165 thread, it might give you some hints.
+
+`CONFIG_ASYNC_TCP_RUNNING_CORE` - CPU core thread affinity that runs the queue events handling and executes server callbacks. Default is ANY core, so it means that for dualcore SoCs both cores could handle server activities. If your server's code is too heavy and unoptimized or you see that sometimes
+server might affect other network activities, you might consider to bind it to the same core that runs Arduino code (1) to minimize affect on radio part. Otherwise you can leave the default to let RTOS decide where to run the thread based on priority
+
+`CONFIG_ASYNC_TCP_STACK_SIZE` - stack size for the thread that runs sever events and callbacks. Default is 16k that is a way too much waste for well-defined short async code or simple static file handling. You might want to cosider reducing it to 4-8k to same RAM usage. If you do not know what this is or not sure about your callback code demands - leave it as default, should be enough even for very hungry callbacks in most cases.
+
+> [!NOTE]
+> This relates to ESP32 only, ESP8266 uses different ESPAsyncTCP lib that does not has this build options
+
+I personally use the following configuration in my projects:
+
+```c++
+  -D CONFIG_ASYNC_TCP_MAX_ACK_TIME=5000   // (keep default)
+  -D CONFIG_ASYNC_TCP_PRIORITY=10         // (keep default)
+  -D CONFIG_ASYNC_TCP_QUEUE_SIZE=64       // (keep default)
+  -D CONFIG_ASYNC_TCP_RUNNING_CORE=1      // force async_tcp task to be on same core as Arduino app (default is any core)
+  -D CONFIG_ASYNC_TCP_STACK_SIZE=4096     // reduce the stack size (default is 16K)
+```
+
+If you need to serve chunk requests with a really low buffer (which should be avoided), you can set `-D ASYNCWEBSERVER_USE_CHUNK_INFLIGHT=0` to disable the in-flight control.

Raumtermostat/lib/ESPAsyncWebServer/data/README.md

@@ -0,0 +1,48 @@
+Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+dapibus elit, id varius sem dui id lacus.</p>
+<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+dapibus elit, id varius sem dui id lacus.</p>
+<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+dapibus elit, id varius sem dui id lacus.</p>
+<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+dapibus elit, id varius sem dui id lacus.</p>
+<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+dapibus elit, id varius sem dui id lacus.</p>
+<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+dapibus elit, id varius sem dui id lacus.</p>
+<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+dapibus elit, id varius sem dui id lacus.</p>
+<p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+dapibus elit, id varius sem dui id lacus.

Raumtermostat/lib/ESPAsyncWebServer/examples/AsyncResponseStream/AsyncResponseStream.ino

@@ -0,0 +1,47 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+#include <DNSServer.h>
+#ifdef ESP32
+#include <AsyncTCP.h>
+#include <WiFi.h>
+#elif defined(ESP8266)
+#include <ESP8266WiFi.h>
+#include <ESPAsyncTCP.h>
+#elif defined(TARGET_RP2040) || defined(TARGET_RP2350) || defined(PICO_RP2040) || defined(PICO_RP2350)
+#include <RPAsyncTCP.h>
+#include <WiFi.h>
+#endif
+
+#include <ESPAsyncWebServer.h>
+
+static AsyncWebServer server(80);
+
+void setup() {
+  Serial.begin(115200);
+
+#ifndef CONFIG_IDF_TARGET_ESP32H2
+  WiFi.mode(WIFI_AP);
+  WiFi.softAP("esp-captive");
+#endif
+
+  // Shows how to use AsyncResponseStream.
+  // The internal buffer will be allocated and data appended to it,
+  // until the response is sent, then this buffer is read and committed on the network.
+  //
+  // curl -v http://192.168.4.1/
+  //
+  server.on("/", HTTP_GET, [](AsyncWebServerRequest *request) {
+    AsyncResponseStream *response = request->beginResponseStream("plain/text", 40 * 1024);
+    for (int i = 0; i < 32 * 1024; i++) {
+      response->write('a');
+    }
+    request->send(response);
+  });
+
+  server.begin();
+}
+
+void loop() {
+  delay(100);
+}

Raumtermostat/lib/ESPAsyncWebServer/examples/Auth/Auth.ino

@@ -0,0 +1,157 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+//
+// Authentication and authorization middlewares
+//
+
+#include <Arduino.h>
+#ifdef ESP32
+#include <AsyncTCP.h>
+#include <WiFi.h>
+#elif defined(ESP8266)
+#include <ESP8266WiFi.h>
+#include <ESPAsyncTCP.h>
+#elif defined(TARGET_RP2040) || defined(TARGET_RP2350) || defined(PICO_RP2040) || defined(PICO_RP2350)
+#include <RPAsyncTCP.h>
+#include <WiFi.h>
+#endif
+
+#include <ESPAsyncWebServer.h>
+
+static AsyncWebServer server(80);
+
+// basicAuth
+static AsyncAuthenticationMiddleware basicAuth;
+static AsyncAuthenticationMiddleware basicAuthHash;
+
+// simple digest authentication
+static AsyncAuthenticationMiddleware digestAuth;
+static AsyncAuthenticationMiddleware digestAuthHash;
+
+// complex authentication which adds request attributes for the next middlewares and handler
+static AsyncMiddlewareFunction complexAuth([](AsyncWebServerRequest *request, ArMiddlewareNext next) {
+  if (!request->authenticate("user", "password")) {
+    return request->requestAuthentication();
+  }
+
+  // add attributes to the request for the next middlewares and handler
+  request->setAttribute("user", "Mathieu");
+  request->setAttribute("role", "staff");
+  if (request->hasParam("token")) {
+    request->setAttribute("token", request->getParam("token")->value().c_str());
+  }
+
+  next();
+});
+
+static AsyncAuthorizationMiddleware authz([](AsyncWebServerRequest *request) {
+  return request->getAttribute("token") == "123";
+});
+
+void setup() {
+  Serial.begin(115200);
+
+#ifndef CONFIG_IDF_TARGET_ESP32H2
+  WiFi.mode(WIFI_AP);
+  WiFi.softAP("esp-captive");
+#endif
+
+  // basic authentication
+  basicAuth.setUsername("admin");
+  basicAuth.setPassword("admin");
+  basicAuth.setRealm("MyApp");
+  basicAuth.setAuthFailureMessage("Authentication failed");
+  basicAuth.setAuthType(AsyncAuthType::AUTH_BASIC);
+  basicAuth.generateHash();  // precompute hash (optional but recommended)
+
+  // basic authentication with hash
+  basicAuthHash.setUsername("admin");
+  basicAuthHash.setPasswordHash("YWRtaW46YWRtaW4=");  // BASE64(admin:admin)
+  basicAuthHash.setRealm("MyApp");
+  basicAuthHash.setAuthFailureMessage("Authentication failed");
+  basicAuthHash.setAuthType(AsyncAuthType::AUTH_BASIC);
+
+  // digest authentication
+  digestAuth.setUsername("admin");
+  digestAuth.setPassword("admin");
+  digestAuth.setRealm("MyApp");
+  digestAuth.setAuthFailureMessage("Authentication failed");
+  digestAuth.setAuthType(AsyncAuthType::AUTH_DIGEST);
+  digestAuth.generateHash();  // precompute hash (optional but recommended)
+
+  // digest authentication with hash
+  digestAuthHash.setUsername("admin");
+  digestAuthHash.setPasswordHash("f499b71f9a36d838b79268e145e132f7");  // MD5(user:realm:pass)
+  digestAuthHash.setRealm("MyApp");
+  digestAuthHash.setAuthFailureMessage("Authentication failed");
+  digestAuthHash.setAuthType(AsyncAuthType::AUTH_DIGEST);
+
+  // basic authentication method
+  // curl -v -u admin:admin  http://192.168.4.1/auth-basic
+  server
+    .on(
+      "/auth-basic", HTTP_GET,
+      [](AsyncWebServerRequest *request) {
+        request->send(200, "text/plain", "Hello, world!");
+      }
+    )
+    .addMiddleware(&basicAuth);
+
+  // basic authentication method with hash
+  // curl -v -u admin:admin  http://192.168.4.1/auth-basic-hash
+  server
+    .on(
+      "/auth-basic-hash", HTTP_GET,
+      [](AsyncWebServerRequest *request) {
+        request->send(200, "text/plain", "Hello, world!");
+      }
+    )
+    .addMiddleware(&basicAuthHash);
+
+  // digest authentication
+  // curl -v -u admin:admin --digest  http://192.168.4.1/auth-digest
+  server
+    .on(
+      "/auth-digest", HTTP_GET,
+      [](AsyncWebServerRequest *request) {
+        request->send(200, "text/plain", "Hello, world!");
+      }
+    )
+    .addMiddleware(&digestAuth);
+
+  // digest authentication with hash
+  // curl -v -u admin:admin --digest  http://192.168.4.1/auth-digest-hash
+  server
+    .on(
+      "/auth-digest-hash", HTTP_GET,
+      [](AsyncWebServerRequest *request) {
+        request->send(200, "text/plain", "Hello, world!");
+      }
+    )
+    .addMiddleware(&digestAuthHash);
+
+  // test digest auth custom authorization middleware
+  // curl -v --digest -u user:password  http://192.168.4.1/auth-custom?token=123 => OK
+  // curl -v --digest -u user:password  http://192.168.4.1/auth-custom?token=456 => 403
+  // curl -v --digest -u user:FAILED  http://192.168.4.1/auth-custom?token=456 => 401
+  server
+    .on(
+      "/auth-custom", HTTP_GET,
+      [](AsyncWebServerRequest *request) {
+        String buffer = "Hello ";
+        buffer.concat(request->getAttribute("user"));
+        buffer.concat(" with role: ");
+        buffer.concat(request->getAttribute("role"));
+        request->send(200, "text/plain", buffer);
+      }
+    )
+    .addMiddlewares({&complexAuth, &authz});
+
+  server.begin();
+}
+
+// not needed
+void loop() {
+  delay(100);
+}

Raumtermostat/lib/ESPAsyncWebServer/examples/CORS/CORS.ino

@@ -0,0 +1,60 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+//
+// How to use CORS middleware
+//
+
+#include <Arduino.h>
+#ifdef ESP32
+#include <AsyncTCP.h>
+#include <WiFi.h>
+#elif defined(ESP8266)
+#include <ESP8266WiFi.h>
+#include <ESPAsyncTCP.h>
+#elif defined(TARGET_RP2040) || defined(TARGET_RP2350) || defined(PICO_RP2040) || defined(PICO_RP2350)
+#include <RPAsyncTCP.h>
+#include <WiFi.h>
+#endif
+
+#include <ESPAsyncWebServer.h>
+
+static AsyncWebServer server(80);
+static AsyncCorsMiddleware cors;
+
+void setup() {
+  Serial.begin(115200);
+
+#ifndef CONFIG_IDF_TARGET_ESP32H2
+  WiFi.mode(WIFI_AP);
+  WiFi.softAP("esp-captive");
+#endif
+
+  cors.setOrigin("http://192.168.4.1");
+  cors.setMethods("POST, GET, OPTIONS, DELETE");
+  cors.setHeaders("X-Custom-Header");
+  cors.setAllowCredentials(false);
+  cors.setMaxAge(600);
+
+  server.addMiddleware(&cors);
+
+  // Test CORS preflight request
+  // curl -v -X OPTIONS -H "origin: http://192.168.4.1" http://192.168.4.1/cors
+  //
+  // Test CORS request
+  // curl -v -H "origin: http://192.168.4.1" http://192.168.4.1/cors
+  //
+  // Test non-CORS request
+  // curl -v http://192.168.4.1/cors
+  //
+  server.on("/cors", HTTP_GET, [](AsyncWebServerRequest *request) {
+    request->send(200, "text/plain", "Hello, world!");
+  });
+
+  server.begin();
+}
+
+// not needed
+void loop() {
+  delay(100);
+}

Raumtermostat/lib/ESPAsyncWebServer/examples/CaptivePortal/CaptivePortal.ino

@@ -0,0 +1,60 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+#include <DNSServer.h>
+#ifdef ESP32
+#include <AsyncTCP.h>
+#include <WiFi.h>
+#elif defined(ESP8266)
+#include <ESP8266WiFi.h>
+#include <ESPAsyncTCP.h>
+#elif defined(TARGET_RP2040) || defined(TARGET_RP2350) || defined(PICO_RP2040) || defined(PICO_RP2350)
+#include <RPAsyncTCP.h>
+#include <WiFi.h>
+#endif
+#include "ESPAsyncWebServer.h"
+
+static DNSServer dnsServer;
+static AsyncWebServer server(80);
+
+class CaptiveRequestHandler : public AsyncWebHandler {
+public:
+  bool canHandle(__unused AsyncWebServerRequest *request) const override {
+    return true;
+  }
+
+  void handleRequest(AsyncWebServerRequest *request) {
+    AsyncResponseStream *response = request->beginResponseStream("text/html");
+    response->print("<!DOCTYPE html><html><head><title>Captive Portal</title></head><body>");
+    response->print("<p>This is our captive portal front page.</p>");
+    response->printf("<p>You were trying to reach: http://%s%s</p>", request->host().c_str(), request->url().c_str());
+#ifndef CONFIG_IDF_TARGET_ESP32H2
+    response->printf("<p>Try opening <a href='http://%s'>this link</a> instead</p>", WiFi.softAPIP().toString().c_str());
+#endif
+    response->print("</body></html>");
+    request->send(response);
+  }
+};
+
+void setup() {
+  Serial.begin(115200);
+  Serial.println();
+  Serial.println("Configuring access point...");
+
+#ifndef CONFIG_IDF_TARGET_ESP32H2
+  if (!WiFi.softAP("esp-captive")) {
+    Serial.println("Soft AP creation failed.");
+    while (1);
+  }
+
+  dnsServer.start(53, "*", WiFi.softAPIP());
+#endif
+
+  server.addHandler(new CaptiveRequestHandler()).setFilter(ON_AP_FILTER);  // only when requested from AP
+  // more handlers...
+  server.begin();
+}
+
+void loop() {
+  dnsServer.processNextRequest();
+}

Raumtermostat/lib/ESPAsyncWebServer/examples/CatchAllHandler/CatchAllHandler.ino

@@ -0,0 +1,133 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+//
+// Shows how to catch all requests and send a 404 Not Found response
+//
+
+#include <Arduino.h>
+#ifdef ESP32
+#include <AsyncTCP.h>
+#include <WiFi.h>
+#elif defined(ESP8266)
+#include <ESP8266WiFi.h>
+#include <ESPAsyncTCP.h>
+#elif defined(TARGET_RP2040) || defined(TARGET_RP2350) || defined(PICO_RP2040) || defined(PICO_RP2350)
+#include <RPAsyncTCP.h>
+#include <WiFi.h>
+#endif
+
+#include <ESPAsyncWebServer.h>
+
+static AsyncWebServer server(80);
+
+static const char *htmlContent PROGMEM = R"(
+<!DOCTYPE html>
+<html>
+<head>
+    <title>Sample HTML</title>
+</head>
+<body>
+    <h1>Hello, World!</h1>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+</body>
+</html>
+)";
+
+static const size_t htmlContentLength = strlen_P(htmlContent);
+
+void setup() {
+  Serial.begin(115200);
+
+#ifndef CONFIG_IDF_TARGET_ESP32H2
+  WiFi.mode(WIFI_AP);
+  WiFi.softAP("esp-captive");
+#endif
+
+  // curl -v http://192.168.4.1/
+  server.on("/", HTTP_GET, [](AsyncWebServerRequest *request) {
+    // need to cast to uint8_t*
+    // if you do not, the const char* will be copied in a temporary String buffer
+    request->send(200, "text/html", (uint8_t *)htmlContent, htmlContentLength);
+  });
+
+  // catch any request, and send a 404 Not Found response
+  // except for /game_log which is handled by onRequestBody
+  //
+  // curl -v http://192.168.4.1/foo
+  //
+  server.onNotFound([](AsyncWebServerRequest *request) {
+    if (request->url() == "/game_log") {
+      return;  // response object already created by onRequestBody
+    }
+
+    request->send(404, "text/plain", "Not found");
+  });
+
+  // See: https://github.com/ESP32Async/ESPAsyncWebServer/issues/6
+  // catch any POST request and send a 200 OK response
+  //
+  // curl -v -X POST http://192.168.4.1/game_log -H "Content-Type: application/json" -d '{"game": "test"}'
+  //
+  server.onRequestBody([](AsyncWebServerRequest *request, uint8_t *data, size_t len, size_t index, size_t total) {
+    if (request->url() == "/game_log") {
+      request->send(200, "application/json", "{\"status\":\"OK\"}");
+    }
+    // note that there is no else here: the goal is only to prepare a response based on some body content
+    // onNotFound will always be called after this, and will not override the response object if `/game_log` is requested
+  });
+
+  server.begin();
+}
+
+// not needed
+void loop() {
+  delay(100);
+}

Raumtermostat/lib/ESPAsyncWebServer/examples/ChunkResponse/ChunkResponse.ino

@@ -0,0 +1,140 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+//
+// Chunk response with caching example
+//
+
+#include <Arduino.h>
+#ifdef ESP32
+#include <AsyncTCP.h>
+#include <WiFi.h>
+#elif defined(ESP8266)
+#include <ESP8266WiFi.h>
+#include <ESPAsyncTCP.h>
+#elif defined(TARGET_RP2040) || defined(TARGET_RP2350) || defined(PICO_RP2040) || defined(PICO_RP2350)
+#include <RPAsyncTCP.h>
+#include <WiFi.h>
+#endif
+
+#include <ESPAsyncWebServer.h>
+
+static AsyncWebServer server(80);
+
+static const char *htmlContent PROGMEM = R"(
+<!DOCTYPE html>
+<html>
+<head>
+    <title>Sample HTML</title>
+</head>
+<body>
+    <h1>Hello, World!</h1>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+</body>
+</html>
+)";
+
+static const size_t htmlContentLength = strlen_P(htmlContent);
+
+void setup() {
+  Serial.begin(115200);
+
+#ifndef CONFIG_IDF_TARGET_ESP32H2
+  WiFi.mode(WIFI_AP);
+  WiFi.softAP("esp-captive");
+#endif
+
+  // first time: serves the file and cache headers
+  // curl -N -v http://192.168.4.1/ --output -
+  //
+  // secodn time: serves 304
+  // curl -N -v -H "if-none-match: 4272" http://192.168.4.1/ --output -
+  //
+  server.on("/", HTTP_GET, [](AsyncWebServerRequest *request) {
+    String etag = String(htmlContentLength);
+
+    if (request->header(asyncsrv::T_INM) == etag) {
+      request->send(304);
+      return;
+    }
+
+    AsyncWebServerResponse *response = request->beginChunkedResponse("text/html", [](uint8_t *buffer, size_t maxLen, size_t index) -> size_t {
+      Serial.printf("%u / %u\n", index, htmlContentLength);
+
+      // finished ?
+      if (htmlContentLength <= index) {
+        Serial.println("finished");
+        return 0;
+      }
+
+      // serve a maximum of 256 or maxLen bytes of the remaining content
+      // this small number is specifically chosen to demonstrate the chunking
+      // DO NOT USE SUCH SMALL NUMBER IN PRODUCTION
+      // Reducing the chunk size will increase the response time, thus reducing the server's capacity in processing concurrent requests
+      const int chunkSize = min((size_t)256, min(maxLen, htmlContentLength - index));
+      Serial.printf("sending: %u\n", chunkSize);
+
+      memcpy(buffer, htmlContent + index, chunkSize);
+
+      return chunkSize;
+    });
+
+    response->addHeader(asyncsrv::T_Cache_Control, "public,max-age=60");
+    response->addHeader(asyncsrv::T_ETag, etag);
+
+    request->send(response);
+  });
+
+  server.begin();
+}
+
+void loop() {
+  delay(100);
+}

Raumtermostat/lib/ESPAsyncWebServer/examples/ChunkRetryResponse/ChunkRetryResponse.ino

@@ -0,0 +1,216 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+//
+// Shows how to wait in a chunk response for incoming data
+//
+
+#include <Arduino.h>
+#ifdef ESP32
+#include <AsyncTCP.h>
+#include <WiFi.h>
+#elif defined(ESP8266)
+#include <ESP8266WiFi.h>
+#include <ESPAsyncTCP.h>
+#elif defined(TARGET_RP2040) || defined(TARGET_RP2350) || defined(PICO_RP2040) || defined(PICO_RP2350)
+#include <RPAsyncTCP.h>
+#include <WiFi.h>
+#endif
+
+#include <ESPAsyncWebServer.h>
+
+#if __has_include("ArduinoJson.h")
+#include <ArduinoJson.h>
+#include <AsyncJson.h>
+#include <AsyncMessagePack.h>
+#endif
+
+static const char *htmlContent PROGMEM = R"(
+<!DOCTYPE html>
+<html>
+<head>
+    <title>Sample HTML</title>
+</head>
+<body>
+    <h1>Hello, World!</h1>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+</body>
+</html>
+)";
+
+static const size_t htmlContentLength = strlen_P(htmlContent);
+
+static AsyncWebServer server(80);
+static AsyncLoggingMiddleware requestLogger;
+
+static String triggerUART;
+static int key = -1;
+
+void setup() {
+  Serial.begin(115200);
+
+#ifndef CONFIG_IDF_TARGET_ESP32H2
+  WiFi.mode(WIFI_AP);
+  WiFi.softAP("esp-captive");
+#endif
+
+  // adds some internal request logging for debugging
+  requestLogger.setEnabled(true);
+  requestLogger.setOutput(Serial);
+
+  server.addMiddleware(&requestLogger);
+
+#if __has_include("ArduinoJson.h")
+
+  //
+  // HOW TO RUN THIS EXAMPLE:
+  //
+  // 1. Trigger a request that will be blocked for a long time:
+  //    > time curl -v -X POST http://192.168.4.1/api -H "Content-Type: application/json" -d '{"input": "Please type a key to continue in Serial console..."}' --output -
+  //
+  // 2. While waiting, in another terminal, run some concurrent requests:
+  //    > time curl -v http://192.168.4.1/
+  //
+  // 3. Type a key in the Serial console to continue the processing within 30 seconds.
+  //    This should unblock the first request.
+  //
+  server.on("/", HTTP_GET, [](AsyncWebServerRequest *request) {
+    // need to cast to uint8_t*
+    // if you do not, the const char* will be copied in a temporary String buffer
+    request->send(200, "text/html", (uint8_t *)htmlContent, htmlContentLength);
+  });
+
+  server.on(
+    "/api", HTTP_POST,
+    [](AsyncWebServerRequest *request) {
+      // request parsing has finished
+
+      // no data ?
+      if (!((String *)request->_tempObject)->length()) {
+        request->send(400);
+        return;
+      }
+
+      JsonDocument doc;
+
+      // deserialize and check for errors
+      if (deserializeJson(doc, *(String *)request->_tempObject)) {
+        request->send(400);
+        return;
+      }
+
+      // start UART com: UART will send the data to the Serial console and wait for the key press
+      triggerUART = doc["input"].as<const char *>();
+      key = -1;
+
+      AsyncWebServerResponse *response = request->beginChunkedResponse("text/plain", [](uint8_t *buffer, size_t maxLen, size_t index) -> size_t {
+        // still waiting for UARY ?
+        if (triggerUART.length() && key == -1) {
+          return RESPONSE_TRY_AGAIN;
+        }
+
+        // finished ?
+        if (!triggerUART.length() && key == -1) {
+          return 0;  // 0 means we are done
+        }
+
+        // log_d("UART answered!");
+
+        String answer = "You typed: ";
+        answer.concat((char)key);
+
+        // note: I did not check for maxLen, but you should (see ChunkResponse.ino)
+        memcpy(buffer, answer.c_str(), answer.length());
+
+        // finish!
+        triggerUART = emptyString;
+        key = -1;
+
+        return answer.length();
+      });
+
+      request->send(response);
+    },
+    NULL,  // upload handler is not used so it should be NULL
+    [](AsyncWebServerRequest *request, uint8_t *data, size_t len, size_t index, size_t total) {
+      // log_d("Body: index: %u, len: %u, total: %u", index, len, total);
+
+      if (!index) {
+        // log_d("Start body parsing");
+        request->_tempObject = new String();
+        // cast request->_tempObject pointer to String and reserve total size
+        ((String *)request->_tempObject)->reserve(total);
+        // set timeout 30s
+        request->client()->setRxTimeout(30);
+      }
+
+      // log_d("Append body data");
+      ((String *)request->_tempObject)->concat((const char *)data, len);
+    }
+  );
+
+#endif
+
+  server.begin();
+}
+
+void loop() {
+  if (triggerUART.length() && key == -1) {
+    Serial.println(triggerUART);
+    // log_d("Waiting for UART input...");
+    while (!Serial.available()) {
+      delay(100);
+    }
+    key = Serial.read();
+    Serial.flush();
+    // log_d("UART input: %c", key);
+    triggerUART = emptyString;
+  }
+}

Raumtermostat/lib/ESPAsyncWebServer/examples/EndBegin/EndBegin.ino

@@ -0,0 +1,49 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+//
+// https://github.com/ESP32Async/ESPAsyncWebServer/discussions/23
+//
+
+#include <Arduino.h>
+#ifdef ESP32
+#include <AsyncTCP.h>
+#include <WiFi.h>
+#elif defined(ESP8266)
+#include <ESP8266WiFi.h>
+#include <ESPAsyncTCP.h>
+#elif defined(TARGET_RP2040) || defined(TARGET_RP2350) || defined(PICO_RP2040) || defined(PICO_RP2350)
+#include <RPAsyncTCP.h>
+#include <WiFi.h>
+#endif
+
+#include <ESPAsyncWebServer.h>
+
+static AsyncWebServer server(80);
+
+void setup() {
+  Serial.begin(115200);
+
+#ifndef CONFIG_IDF_TARGET_ESP32H2
+  WiFi.mode(WIFI_AP);
+  WiFi.softAP("esp-captive");
+#endif
+
+  server.on("/", HTTP_GET, [](AsyncWebServerRequest *request) {
+    request->send(200, "text/plain", "Hello, world");
+  });
+
+  server.begin();
+  Serial.println("begin() - run: curl -v http://192.168.4.1/ => should succeed");
+  delay(10000);
+
+  Serial.println("end()");
+  server.end();
+  server.begin();
+  Serial.println("begin() - run: curl -v http://192.168.4.1/ => should succeed");
+}
+
+// not needed
+void loop() {
+  delay(100);
+}

Raumtermostat/lib/ESPAsyncWebServer/examples/Filters/Filters.ino

@@ -0,0 +1,136 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+//
+// Shows how to use setFilter to route requests to different handlers based on WiFi mode
+//
+
+#include <DNSServer.h>
+#ifdef ESP32
+#include <AsyncTCP.h>
+#include <WiFi.h>
+#elif defined(ESP8266)
+#include <ESP8266WiFi.h>
+#include <ESPAsyncTCP.h>
+#elif defined(TARGET_RP2040) || defined(TARGET_RP2350) || defined(PICO_RP2040) || defined(PICO_RP2350)
+#include <RPAsyncTCP.h>
+#include <WiFi.h>
+#endif
+#include "ESPAsyncWebServer.h"
+
+static DNSServer dnsServer;
+static AsyncWebServer server(80);
+
+class CaptiveRequestHandler : public AsyncWebHandler {
+public:
+  bool canHandle(__unused AsyncWebServerRequest *request) const override {
+    return true;
+  }
+
+  void handleRequest(AsyncWebServerRequest *request) override {
+    AsyncResponseStream *response = request->beginResponseStream("text/html");
+    response->print("<!DOCTYPE html><html><head><title>Captive Portal</title></head><body>");
+    response->print("<p>This is out captive portal front page.</p>");
+    response->printf("<p>You were trying to reach: http://%s%s</p>", request->host().c_str(), request->url().c_str());
+#ifndef CONFIG_IDF_TARGET_ESP32H2
+    response->printf("<p>Try opening <a href='http://%s'>this link</a> instead</p>", WiFi.softAPIP().toString().c_str());
+#endif
+    response->print("</body></html>");
+    request->send(response);
+  }
+};
+
+bool hit1 = false;
+bool hit2 = false;
+
+void setup() {
+  Serial.begin(115200);
+
+  server
+    .on(
+      "/", HTTP_GET,
+      [](AsyncWebServerRequest *request) {
+        Serial.println("Captive portal request...");
+#ifndef CONFIG_IDF_TARGET_ESP32H2
+        Serial.println("WiFi.localIP(): " + WiFi.localIP().toString());
+#endif
+        Serial.println("request->client()->localIP(): " + request->client()->localIP().toString());
+#if ESP_IDF_VERSION_MAJOR >= 5
+#ifndef CONFIG_IDF_TARGET_ESP32H2
+        Serial.println("WiFi.type(): " + String((int)WiFi.localIP().type()));
+#endif
+        Serial.println("request->client()->type(): " + String((int)request->client()->localIP().type()));
+#endif
+#ifndef CONFIG_IDF_TARGET_ESP32H2
+        Serial.println(WiFi.localIP() == request->client()->localIP() ? "should be: ON_STA_FILTER" : "should be: ON_AP_FILTER");
+        Serial.println(WiFi.localIP() == request->client()->localIP());
+        Serial.println(WiFi.localIP().toString() == request->client()->localIP().toString());
+#endif
+        request->send(200, "text/plain", "This is the captive portal");
+        hit1 = true;
+      }
+    )
+    .setFilter(ON_AP_FILTER);
+
+  server
+    .on(
+      "/", HTTP_GET,
+      [](AsyncWebServerRequest *request) {
+        Serial.println("Website request...");
+#ifndef CONFIG_IDF_TARGET_ESP32H2
+        Serial.println("WiFi.localIP(): " + WiFi.localIP().toString());
+#endif
+        Serial.println("request->client()->localIP(): " + request->client()->localIP().toString());
+#if ESP_IDF_VERSION_MAJOR >= 5
+#ifndef CONFIG_IDF_TARGET_ESP32H2
+        Serial.println("WiFi.type(): " + String((int)WiFi.localIP().type()));
+#endif
+        Serial.println("request->client()->type(): " + String((int)request->client()->localIP().type()));
+#endif
+#ifndef CONFIG_IDF_TARGET_ESP32H2
+        Serial.println(WiFi.localIP() == request->client()->localIP() ? "should be: ON_STA_FILTER" : "should be: ON_AP_FILTER");
+        Serial.println(WiFi.localIP() == request->client()->localIP());
+        Serial.println(WiFi.localIP().toString() == request->client()->localIP().toString());
+#endif
+        request->send(200, "text/plain", "This is the website");
+        hit2 = true;
+      }
+    )
+    .setFilter(ON_STA_FILTER);
+
+  // assert(WiFi.softAP("esp-captive-portal"));
+  // dnsServer.start(53, "*", WiFi.softAPIP());
+  // server.begin();
+  // Serial.println("Captive portal started!");
+
+  // while (!hit1) {
+  //   dnsServer.processNextRequest();
+  //   yield();
+  // }
+  // delay(1000); // Wait for the client to process the response
+
+  // Serial.println("Captive portal opened, stopping it and connecting to WiFi...");
+  // dnsServer.stop();
+  // WiFi.softAPdisconnect();
+
+#ifndef CONFIG_IDF_TARGET_ESP32H2
+  WiFi.persistent(false);
+  WiFi.begin("IoT");
+  while (WiFi.status() != WL_CONNECTED) {
+    delay(500);
+  }
+  Serial.println("Connected to WiFi with IP address: " + WiFi.localIP().toString());
+#endif
+
+  server.begin();
+
+  // while (!hit2) {
+  //   delay(10);
+  // }
+  // delay(1000); // Wait for the client to process the response
+  // ESP.restart();
+}
+
+void loop() {
+  delay(100);
+}

Raumtermostat/lib/ESPAsyncWebServer/examples/FlashResponse/FlashResponse.ino

@@ -0,0 +1,107 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+//
+// Shows how to serve a large HTML page from flash memory without copying it to heap in a temporary buffer
+//
+
+#include <Arduino.h>
+#ifdef ESP32
+#include <AsyncTCP.h>
+#include <WiFi.h>
+#elif defined(ESP8266)
+#include <ESP8266WiFi.h>
+#include <ESPAsyncTCP.h>
+#elif defined(TARGET_RP2040) || defined(TARGET_RP2350) || defined(PICO_RP2040) || defined(PICO_RP2350)
+#include <RPAsyncTCP.h>
+#include <WiFi.h>
+#endif
+
+#include <ESPAsyncWebServer.h>
+
+static AsyncWebServer server(80);
+
+static const char *htmlContent PROGMEM = R"(
+<!DOCTYPE html>
+<html>
+<head>
+    <title>Sample HTML</title>
+</head>
+<body>
+    <h1>Hello, World!</h1>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+</body>
+</html>
+)";
+
+static const size_t htmlContentLength = strlen_P(htmlContent);
+
+void setup() {
+  Serial.begin(115200);
+
+#ifndef CONFIG_IDF_TARGET_ESP32H2
+  WiFi.mode(WIFI_AP);
+  WiFi.softAP("esp-captive");
+#endif
+
+  // curl -v http://192.168.4.1/
+  server.on("/", HTTP_GET, [](AsyncWebServerRequest *request) {
+    // need to cast to uint8_t*
+    // if you do not, the const char* will be copied in a temporary String buffer
+    request->send(200, "text/html", (uint8_t *)htmlContent, htmlContentLength);
+  });
+
+  server.begin();
+}
+
+// not needed
+void loop() {
+  delay(100);
+}

Raumtermostat/lib/ESPAsyncWebServer/examples/HeaderManipulation/HeaderManipulation.ino

@@ -0,0 +1,88 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+//
+// Show how to manipulate headers in the request / response
+//
+
+#include <Arduino.h>
+#ifdef ESP32
+#include <AsyncTCP.h>
+#include <WiFi.h>
+#elif defined(ESP8266)
+#include <ESP8266WiFi.h>
+#include <ESPAsyncTCP.h>
+#elif defined(TARGET_RP2040) || defined(TARGET_RP2350) || defined(PICO_RP2040) || defined(PICO_RP2350)
+#include <RPAsyncTCP.h>
+#include <WiFi.h>
+#endif
+
+#include <ESPAsyncWebServer.h>
+
+static AsyncWebServer server(80);
+
+// request logger
+static AsyncLoggingMiddleware requestLogger;
+
+// filter out specific headers from the incoming request
+static AsyncHeaderFilterMiddleware headerFilter;
+
+// remove all headers from the incoming request except the ones provided in the constructor
+AsyncHeaderFreeMiddleware headerFree;
+
+void setup() {
+  Serial.begin(115200);
+
+#ifndef CONFIG_IDF_TARGET_ESP32H2
+  WiFi.mode(WIFI_AP);
+  WiFi.softAP("esp-captive");
+#endif
+
+  requestLogger.setEnabled(true);
+  requestLogger.setOutput(Serial);
+
+  headerFilter.filter("X-Remove-Me");
+
+  headerFree.keep("X-Keep-Me");
+  headerFree.keep("host");
+
+  server.addMiddlewares({&requestLogger, &headerFilter});
+
+  // x-remove-me header will be removed
+  //
+  // curl -v -H "X-Header: Foo" -H "x-remove-me: value" http://192.168.4.1/remove
+  //
+  server.on("/remove", HTTP_GET, [](AsyncWebServerRequest *request) {
+    // print all headers
+    for (size_t i = 0; i < request->headers(); i++) {
+      const AsyncWebHeader *h = request->getHeader(i);
+      Serial.printf("Header[%s]: %s\n", h->name().c_str(), h->value().c_str());
+    }
+    request->send(200, "text/plain", "Hello, world!");
+  });
+
+  // Only headers x-keep-me and host will be kept
+  //
+  // curl -v -H "x-keep-me: value" -H "x-remove-me: value" http://192.168.4.1/keep
+  //
+  server
+    .on(
+      "/keep", HTTP_GET,
+      [](AsyncWebServerRequest *request) {
+        // print all headers
+        for (size_t i = 0; i < request->headers(); i++) {
+          const AsyncWebHeader *h = request->getHeader(i);
+          Serial.printf("Header[%s]: %s\n", h->name().c_str(), h->value().c_str());
+        }
+        request->send(200, "text/plain", "Hello, world!");
+      }
+    )
+    .addMiddleware(&headerFree);
+
+  server.begin();
+}
+
+// not needed
+void loop() {
+  delay(100);
+}

Raumtermostat/lib/ESPAsyncWebServer/examples/Headers/Headers.ino

@@ -0,0 +1,69 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+//
+// Query and send headers
+//
+
+#include <Arduino.h>
+#ifdef ESP32
+#include <AsyncTCP.h>
+#include <WiFi.h>
+#elif defined(ESP8266)
+#include <ESP8266WiFi.h>
+#include <ESPAsyncTCP.h>
+#elif defined(TARGET_RP2040) || defined(TARGET_RP2350) || defined(PICO_RP2040) || defined(PICO_RP2350)
+#include <RPAsyncTCP.h>
+#include <WiFi.h>
+#endif
+
+#include <ESPAsyncWebServer.h>
+
+static AsyncWebServer server(80);
+
+void setup() {
+  Serial.begin(115200);
+
+#ifndef CONFIG_IDF_TARGET_ESP32H2
+  WiFi.mode(WIFI_AP);
+  WiFi.softAP("esp-captive");
+#endif
+
+  //
+  // curl -v http://192.168.4.1
+  //
+  server.on("/", HTTP_GET, [](AsyncWebServerRequest *request) {
+    //List all collected headers
+    int headers = request->headers();
+    int i;
+    for (i = 0; i < headers; i++) {
+      const AsyncWebHeader *h = request->getHeader(i);
+      Serial.printf("HEADER[%s]: %s\n", h->name().c_str(), h->value().c_str());
+    }
+
+    AsyncWebServerResponse *response = request->beginResponse(200, "text/plain", "Hello World!");
+
+    //Add header to the response
+    response->addHeader("Server", "ESP Async Web Server");
+
+    //Add multiple headers with the same name
+    response->addHeader("Set-Cookie", "sessionId=38afes7a8", false);
+    response->addHeader("Set-Cookie", "id=a3fWa; Max-Age=2592000", false);
+    response->addHeader("Set-Cookie", "qwerty=219ffwef9w0f; Domain=example.com", false);
+
+    //Remove specific header
+    response->removeHeader("Set-Cookie", "sessionId=38afes7a8");
+
+    //Remove all headers with the same name
+    response->removeHeader("Set-Cookie");
+
+    request->send(response);
+  });
+
+  server.begin();
+}
+
+void loop() {
+  //Sleep in the loop task to not keep the CPU busy
+  delay(1000);
+}

Raumtermostat/lib/ESPAsyncWebServer/examples/Json/Json.ino

@@ -0,0 +1,90 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+//
+// Shows how to send and receive Json data
+//
+
+#include <Arduino.h>
+#ifdef ESP32
+#include <AsyncTCP.h>
+#include <WiFi.h>
+#elif defined(ESP8266)
+#include <ESP8266WiFi.h>
+#include <ESPAsyncTCP.h>
+#elif defined(TARGET_RP2040) || defined(TARGET_RP2350) || defined(PICO_RP2040) || defined(PICO_RP2350)
+#include <RPAsyncTCP.h>
+#include <WiFi.h>
+#endif
+
+#include <ESPAsyncWebServer.h>
+
+#if __has_include("ArduinoJson.h")
+#include <ArduinoJson.h>
+#include <AsyncJson.h>
+#include <AsyncMessagePack.h>
+#endif
+
+static AsyncWebServer server(80);
+
+#if __has_include("ArduinoJson.h")
+static AsyncCallbackJsonWebHandler *handler = new AsyncCallbackJsonWebHandler("/json2");
+#endif
+
+void setup() {
+  Serial.begin(115200);
+
+#ifndef CONFIG_IDF_TARGET_ESP32H2
+  WiFi.mode(WIFI_AP);
+  WiFi.softAP("esp-captive");
+#endif
+
+#if __has_include("ArduinoJson.h")
+  //
+  // sends JSON using AsyncJsonResponse
+  //
+  // curl -v http://192.168.4.1/json1
+  //
+  server.on("/json1", HTTP_GET, [](AsyncWebServerRequest *request) {
+    AsyncJsonResponse *response = new AsyncJsonResponse();
+    JsonObject root = response->getRoot().to<JsonObject>();
+    root["hello"] = "world";
+    response->setLength();
+    request->send(response);
+  });
+
+  // Send JSON using AsyncResponseStream
+  //
+  // curl -v http://192.168.4.1/json2
+  //
+  server.on("/json2", HTTP_GET, [](AsyncWebServerRequest *request) {
+    AsyncResponseStream *response = request->beginResponseStream("application/json");
+    JsonDocument doc;
+    JsonObject root = doc.to<JsonObject>();
+    root["foo"] = "bar";
+    serializeJson(root, *response);
+    request->send(response);
+  });
+
+  // curl -v -X POST -H 'Content-Type: application/json' -d '{"name":"You"}' http://192.168.4.1/json2
+  // curl -v -X PUT -H 'Content-Type: application/json' -d '{"name":"You"}' http://192.168.4.1/json2
+  handler->setMethod(HTTP_POST | HTTP_PUT);
+  handler->onRequest([](AsyncWebServerRequest *request, JsonVariant &json) {
+    serializeJson(json, Serial);
+    AsyncJsonResponse *response = new AsyncJsonResponse();
+    JsonObject root = response->getRoot().to<JsonObject>();
+    root["hello"] = json.as<JsonObject>()["name"];
+    response->setLength();
+    request->send(response);
+  });
+
+  server.addHandler(handler);
+#endif
+
+  server.begin();
+}
+
+// not needed
+void loop() {
+  delay(100);
+}

Raumtermostat/lib/ESPAsyncWebServer/examples/Logging/Logging.ino

@@ -0,0 +1,49 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+//
+// Show how to log the incoming request and response as a curl-like syntax
+//
+
+#include <Arduino.h>
+#ifdef ESP32
+#include <AsyncTCP.h>
+#include <WiFi.h>
+#elif defined(ESP8266)
+#include <ESP8266WiFi.h>
+#include <ESPAsyncTCP.h>
+#elif defined(TARGET_RP2040) || defined(TARGET_RP2350) || defined(PICO_RP2040) || defined(PICO_RP2350)
+#include <RPAsyncTCP.h>
+#include <WiFi.h>
+#endif
+
+#include <ESPAsyncWebServer.h>
+
+static AsyncWebServer server(80);
+static AsyncLoggingMiddleware requestLogger;
+
+void setup() {
+  Serial.begin(115200);
+
+#ifndef CONFIG_IDF_TARGET_ESP32H2
+  WiFi.mode(WIFI_AP);
+  WiFi.softAP("esp-captive");
+#endif
+
+  requestLogger.setEnabled(true);
+  requestLogger.setOutput(Serial);
+
+  server.addMiddleware(&requestLogger);
+
+  // curl -v -H "X-Header:Foo" http://192.168.4.1/
+  server.on("/", HTTP_GET, [](AsyncWebServerRequest *request) {
+    request->send(200, "text/plain", "Hello, world!");
+  });
+
+  server.begin();
+}
+
+// not needed
+void loop() {
+  delay(100);
+}

Raumtermostat/lib/ESPAsyncWebServer/examples/MessagePack/MessagePack.ino

@@ -0,0 +1,88 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+//
+// Shows how to send and receive Message Pack data
+//
+
+#include <Arduino.h>
+#ifdef ESP32
+#include <AsyncTCP.h>
+#include <WiFi.h>
+#elif defined(ESP8266)
+#include <ESP8266WiFi.h>
+#include <ESPAsyncTCP.h>
+#elif defined(TARGET_RP2040) || defined(TARGET_RP2350) || defined(PICO_RP2040) || defined(PICO_RP2350)
+#include <RPAsyncTCP.h>
+#include <WiFi.h>
+#endif
+
+#include <ESPAsyncWebServer.h>
+
+#if __has_include("ArduinoJson.h")
+#include <ArduinoJson.h>
+#include <AsyncJson.h>
+#include <AsyncMessagePack.h>
+#endif
+
+static AsyncWebServer server(80);
+
+#if __has_include("ArduinoJson.h")
+static AsyncCallbackMessagePackWebHandler *handler = new AsyncCallbackMessagePackWebHandler("/msgpack2");
+#endif
+
+void setup() {
+  Serial.begin(115200);
+
+#ifndef CONFIG_IDF_TARGET_ESP32H2
+  WiFi.mode(WIFI_AP);
+  WiFi.softAP("esp-captive");
+#endif
+
+#if __has_include("ArduinoJson.h")
+  //
+  // sends MessagePack using AsyncMessagePackResponse
+  //
+  // curl -v http://192.168.4.1/msgpack1
+  //
+  server.on("/msgpack1", HTTP_GET, [](AsyncWebServerRequest *request) {
+    AsyncMessagePackResponse *response = new AsyncMessagePackResponse();
+    JsonObject root = response->getRoot().to<JsonObject>();
+    root["hello"] = "world";
+    response->setLength();
+    request->send(response);
+  });
+
+  // Send MessagePack using AsyncResponseStream
+  //
+  // curl -v http://192.168.4.1/msgpack2
+  //
+  server.on("/msgpack2", HTTP_GET, [](AsyncWebServerRequest *request) {
+    AsyncResponseStream *response = request->beginResponseStream("application/msgpack");
+    JsonDocument doc;
+    JsonObject root = doc.to<JsonObject>();
+    root["foo"] = "bar";
+    serializeMsgPack(root, *response);
+    request->send(response);
+  });
+
+  handler->setMethod(HTTP_POST | HTTP_PUT);
+  handler->onRequest([](AsyncWebServerRequest *request, JsonVariant &json) {
+    serializeJson(json, Serial);
+    AsyncMessagePackResponse *response = new AsyncMessagePackResponse();
+    JsonObject root = response->getRoot().to<JsonObject>();
+    root["hello"] = json.as<JsonObject>()["name"];
+    response->setLength();
+    request->send(response);
+  });
+
+  server.addHandler(handler);
+#endif
+
+  server.begin();
+}
+
+// not needed
+void loop() {
+  delay(100);
+}

Raumtermostat/lib/ESPAsyncWebServer/examples/Middleware/Middleware.ino

@@ -0,0 +1,82 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+//
+// Show how to sue Middleware
+//
+
+#include <Arduino.h>
+#ifdef ESP32
+#include <AsyncTCP.h>
+#include <WiFi.h>
+#elif defined(ESP8266)
+#include <ESP8266WiFi.h>
+#include <ESPAsyncTCP.h>
+#elif defined(TARGET_RP2040) || defined(TARGET_RP2350) || defined(PICO_RP2040) || defined(PICO_RP2350)
+#include <RPAsyncTCP.h>
+#include <WiFi.h>
+#endif
+
+#include <ESPAsyncWebServer.h>
+
+static AsyncWebServer server(80);
+
+// New middleware classes can be created!
+class MyMiddleware : public AsyncMiddleware {
+public:
+  void run(AsyncWebServerRequest *request, ArMiddlewareNext next) override {
+    Serial.printf("Before handler: %s %s\n", request->methodToString(), request->url().c_str());
+    next();  // continue middleware chain
+    Serial.printf("After handler: response code=%d\n", request->getResponse()->code());
+  }
+};
+
+void setup() {
+  Serial.begin(115200);
+
+#ifndef CONFIG_IDF_TARGET_ESP32H2
+  WiFi.mode(WIFI_AP);
+  WiFi.softAP("esp-captive");
+#endif
+
+  // add a global middleware to the server
+  server.addMiddleware(new MyMiddleware());
+
+  // Test with:
+  //
+  // - curl -v http://192.168.4.1/            => 200 OK
+  // - curl -v http://192.168.4.1/?user=anon  => 403 Forbidden
+  // - curl -v http://192.168.4.1/?user=foo   => 200 OK
+  // - curl -v http://192.168.4.1/?user=error => 400 ERROR
+  //
+  AsyncCallbackWebHandler &handler = server.on("/", HTTP_GET, [](AsyncWebServerRequest *request) {
+    Serial.printf("In Handler: %s %s\n", request->methodToString(), request->url().c_str());
+    request->send(200, "text/plain", "Hello, world!");
+  });
+
+  // add a middleware to this handler only to send 403 if the user is anon
+  handler.addMiddleware([](AsyncWebServerRequest *request, ArMiddlewareNext next) {
+    Serial.println("Checking user=anon");
+    if (request->hasParam("user") && request->getParam("user")->value() == "anon") {
+      request->send(403, "text/plain", "Forbidden");
+    } else {
+      next();
+    }
+  });
+
+  // add a middleware to this handler that will replace the previously created response by another one
+  handler.addMiddleware([](AsyncWebServerRequest *request, ArMiddlewareNext next) {
+    next();
+    Serial.println("Checking user=error");
+    if (request->hasParam("user") && request->getParam("user")->value() == "error") {
+      request->send(400, "text/plain", "ERROR");
+    }
+  });
+
+  server.begin();
+}
+
+// not needed
+void loop() {
+  delay(100);
+}

Raumtermostat/lib/ESPAsyncWebServer/examples/Params/Params.ino

@@ -0,0 +1,122 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+//
+// Query parameters and body parameters
+//
+
+#include <Arduino.h>
+#ifdef ESP32
+#include <AsyncTCP.h>
+#include <WiFi.h>
+#elif defined(ESP8266)
+#include <ESP8266WiFi.h>
+#include <ESPAsyncTCP.h>
+#elif defined(TARGET_RP2040) || defined(TARGET_RP2350) || defined(PICO_RP2040) || defined(PICO_RP2350)
+#include <RPAsyncTCP.h>
+#include <WiFi.h>
+#endif
+
+#include <ESPAsyncWebServer.h>
+
+static AsyncWebServer server(80);
+
+static const char *htmlContent PROGMEM = R"(
+<!DOCTYPE html>
+<html>
+<head>
+    <title>POST Request with Multiple Parameters</title>
+</head>
+<body>
+    <form action="http://192.168.4.1" method="POST">
+        <label for="who">Who?</label>
+        <input type="text" id="who" name="who" value="Carl"><br>
+        <label for="g0">g0:</label>
+        <input type="text" id="g0" name="g0" value="1"><br>
+        <label for="a0">a0:</label>
+        <input type="text" id="a0" name="a0" value="2"><br>
+        <label for="n0">n0:</label>
+        <input type="text" id="n0" name="n0" value="3"><br>
+        <label for="t10">t10:</label>
+        <input type="text" id="t10" name="t10" value="3"><br>
+        <label for="t20">t20:</label>
+        <input type="text" id="t20" name="t20" value="4"><br>
+        <label for="t30">t30:</label>
+        <input type="text" id="t30" name="t30" value="5"><br>
+        <label for="t40">t40:</label>
+        <input type="text" id="t40" name="t40" value="6"><br>
+        <label for="t50">t50:</label>
+        <input type="text" id="t50" name="t50" value="7"><br>
+        <label for="g1">g1:</label>
+        <input type="text" id="g1" name="g1" value="2"><br>
+        <label for="a1">a1:</label>
+        <input type="text" id="a1" name="a1" value="2"><br>
+        <label for="n1">n1:</label>
+        <input type="text" id="n1" name="n1" value="3"><br>
+        <label for="t11">t11:</label>
+        <input type="text" id="t11" name="t11" value="13"><br>
+        <label for="t21">t21:</label>
+        <input type="text" id="t21" name="t21" value="14"><br>
+        <label for="t31">t31:</label>
+        <input type="text" id="t31" name="t31" value="15"><br>
+        <label for="t41">t41:</label>
+        <input type="text" id="t41" name="t41" value="16"><br>
+        <label for="t51">t51:</label>
+        <input type="text" id="t51" name="t51" value="17"><br>
+        <input type="submit" value="Submit">
+    </form>
+</body>
+</html>
+)";
+
+static const size_t htmlContentLength = strlen_P(htmlContent);
+
+void setup() {
+  Serial.begin(115200);
+
+#ifndef CONFIG_IDF_TARGET_ESP32H2
+  WiFi.mode(WIFI_AP);
+  WiFi.softAP("esp-captive");
+#endif
+
+  // Get query parameters
+  //
+  // curl -v http://192.168.4.1/?who=Bob
+  //
+  server.on("/", HTTP_GET, [](AsyncWebServerRequest *request) {
+    if (request->hasParam("who")) {
+      Serial.printf("Who? %s\n", request->getParam("who")->value().c_str());
+    }
+
+    request->send(200, "text/html", (uint8_t *)htmlContent, htmlContentLength);
+  });
+
+  // Get form body parameters
+  //
+  // curl -v -H "Content-Type: application/x-www-form-urlencoded" -d "who=Carl" -d "param=value" http://192.168.4.1/
+  //
+  server.on("/", HTTP_POST, [](AsyncWebServerRequest *request) {
+    // display params
+    size_t count = request->params();
+    for (size_t i = 0; i < count; i++) {
+      const AsyncWebParameter *p = request->getParam(i);
+      Serial.printf("PARAM[%u]: %s = %s\n", i, p->name().c_str(), p->value().c_str());
+    }
+
+    // get who param
+    String who;
+    if (request->hasParam("who", true)) {
+      who = request->getParam("who", true)->value();
+    } else {
+      who = "No message sent";
+    }
+    request->send(200, "text/plain", "Hello " + who + "!");
+  });
+
+  server.begin();
+}
+
+// not needed
+void loop() {
+  delay(100);
+}

Raumtermostat/lib/ESPAsyncWebServer/examples/PartitionDownloader/PartitionDownloader.ino

@@ -0,0 +1,130 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+//
+// - Download ESP32 partition by name and/or type and/or subtype
+// - Support encrypted and non-encrypted partitions
+//
+
+#include <Arduino.h>
+#ifdef ESP32
+#include <AsyncTCP.h>
+#include <WiFi.h>
+#elif defined(ESP8266)
+#include <ESP8266WiFi.h>
+#include <ESPAsyncTCP.h>
+#elif defined(TARGET_RP2040) || defined(TARGET_RP2350) || defined(PICO_RP2040) || defined(PICO_RP2350)
+#include <RPAsyncTCP.h>
+#include <WiFi.h>
+#endif
+
+#include <ESPAsyncWebServer.h>
+#include <LittleFS.h>
+
+#ifndef ESP32
+// this example is only for the ESP32
+void setup() {}
+void loop() {}
+#else
+
+#include <esp_partition.h>
+
+static AsyncWebServer server(80);
+
+void setup() {
+  Serial.begin(115200);
+
+#ifndef CONFIG_IDF_TARGET_ESP32H2
+  WiFi.mode(WIFI_AP);
+  WiFi.softAP("esp-captive");
+#endif
+
+  LittleFS.begin(true);
+
+  // To upload the FS partition, run:
+  // > pio run -e arduino-3 -t buildfs
+  // > pio run -e arduino-3 -t uploadfs
+  //
+  // Examples:
+  //
+  // - Download the partition named "spiffs": http://192.168.4.1/partition?label=spiffs
+  // - Download the partition named "spiffs" with type "data": http://192.168.4.1/partition?label=spiffs&type=1
+  // - Download the partition named "spiffs" with type "data" and subtype "spiffs": http://192.168.4.1/partition?label=spiffs&type=1&subtype=130
+  // - Download the partition with subtype "nvs": http://192.168.4.1/partition?type=1&subtype=2
+  //
+  // "type" and "subtype" IDs can be found in esp_partition.h header file.
+  //
+  // Add "&raw=false" parameter to download the partition unencrypted (for encrypted partitions).
+  // By default, the raw partition is downloaded, so if a partition is encrypted, the encrypted data will be downloaded.
+  //
+  // To browse a downloaded LittleFS partition, you can use https://tniessen.github.io/littlefs-disk-img-viewer/ (block size is 4096)
+  //
+  server.on("/partition", HTTP_GET, [](AsyncWebServerRequest *request) {
+    const AsyncWebParameter *pLabel = request->getParam("label");
+    const AsyncWebParameter *pType = request->getParam("type");
+    const AsyncWebParameter *pSubtype = request->getParam("subtype");
+    const AsyncWebParameter *pRaw = request->getParam("raw");
+
+    if (!pLabel && !pType && !pSubtype) {
+      request->send(400, "text/plain", "Bad request: missing parameter");
+      return;
+    }
+
+    esp_partition_type_t type = ESP_PARTITION_TYPE_ANY;
+    esp_partition_subtype_t subtype = ESP_PARTITION_SUBTYPE_ANY;
+    const char *label = nullptr;
+    bool raw = true;
+
+    if (pLabel) {
+      label = pLabel->value().c_str();
+    }
+
+    if (pType) {
+      type = (esp_partition_type_t)pType->value().toInt();
+    }
+
+    if (pSubtype) {
+      subtype = (esp_partition_subtype_t)pSubtype->value().toInt();
+    }
+
+    if (pRaw && pRaw->value() == "false") {
+      raw = false;
+    }
+
+    const esp_partition_t *partition = esp_partition_find_first(type, subtype, label);
+
+    if (!partition) {
+      request->send(404, "text/plain", "Partition not found");
+      return;
+    }
+
+    AsyncWebServerResponse *response =
+      request->beginChunkedResponse("application/octet-stream", [partition, raw](uint8_t *buffer, size_t maxLen, size_t index) -> size_t {
+        const size_t remaining = partition->size - index;
+        if (!remaining) {
+          return 0;
+        }
+        const size_t len = std::min(maxLen, remaining);
+        if (raw && esp_partition_read_raw(partition, index, buffer, len) == ESP_OK) {
+          return len;
+        }
+        if (!raw && esp_partition_read(partition, index, buffer, len) == ESP_OK) {
+          return len;
+        }
+        return 0;
+      });
+
+    response->addHeader("Content-Disposition", "attachment; filename=" + String(partition->label) + ".bin");
+    response->setContentLength(partition->size);
+
+    request->send(response);
+  });
+
+  server.begin();
+}
+
+void loop() {
+  delay(100);
+}
+
+#endif

Raumtermostat/lib/ESPAsyncWebServer/examples/PerfTests/PerfTests.ino

@@ -0,0 +1,243 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+//
+// Perf tests
+//
+
+#include <Arduino.h>
+#ifdef ESP32
+#include <AsyncTCP.h>
+#include <WiFi.h>
+#elif defined(ESP8266)
+#include <ESP8266WiFi.h>
+#include <ESPAsyncTCP.h>
+#elif defined(TARGET_RP2040) || defined(TARGET_RP2350) || defined(PICO_RP2040) || defined(PICO_RP2350)
+#include <RPAsyncTCP.h>
+#include <WiFi.h>
+#endif
+
+#include <ESPAsyncWebServer.h>
+
+static const char *htmlContent PROGMEM = R"(
+<!DOCTYPE html>
+<html>
+<head>
+    <title>Sample HTML</title>
+</head>
+<body>
+    <h1>Hello, World!</h1>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+</body>
+</html>
+)";
+
+static const size_t htmlContentLength = strlen_P(htmlContent);
+static constexpr char characters[] = "0123456789ABCDEF";
+static size_t charactersIndex = 0;
+
+static AsyncWebServer server(80);
+static AsyncEventSource events("/events");
+
+static volatile size_t requests = 0;
+
+void setup() {
+  Serial.begin(115200);
+
+#ifndef CONFIG_IDF_TARGET_ESP32H2
+  WiFi.mode(WIFI_AP);
+  WiFi.softAP("esp-captive");
+#endif
+
+  // Pauses in the request parsing phase
+  //
+  // autocannon -c 32 -w 32 -a 96 -t 30 --renderStatusCodes -m POST -H "Content-Type: application/json" -b '{"foo": "bar"}' http://192.168.4.1/delay
+  //
+  // curl -v -X POST -H "Content-Type: application/json" -d '{"game": "test"}' http://192.168.4.1/delay
+  //
+  server.onNotFound([](AsyncWebServerRequest *request) {
+    requests = requests + 1;
+    if (request->url() == "/delay") {
+      request->send(200, "application/json", "{\"status\":\"OK\"}");
+    } else {
+      request->send(404, "text/plain", "Not found");
+    }
+  });
+  server.onRequestBody([](AsyncWebServerRequest *request, uint8_t *data, size_t len, size_t index, size_t total) {
+    if (request->url() == "/delay") {
+      delay(3000);
+    }
+  });
+
+  // HTTP endpoint
+  //
+  // > brew install autocannon
+  // > autocannon -c 10 -w 10 -d 20 http://192.168.4.1
+  // > autocannon -c 16 -w 16 -d 20 http://192.168.4.1
+  //
+  server.on("/", HTTP_GET, [](AsyncWebServerRequest *request) {
+    // need to cast to uint8_t*
+    // if you do not, the const char* will be copied in a temporary String buffer
+    requests = requests + 1;
+    request->send(200, "text/html", (uint8_t *)htmlContent, htmlContentLength);
+  });
+
+  // IMPORTANT - DO NOT WRITE SUCH CODE IN PRODUCTON !
+  //
+  // This example simulates the slowdown that can happen when:
+  // - downloading a huge file from sdcard
+  // - doing some file listing on SDCard because it is horribly slow to get a file listing with file stats on SDCard.
+  // So in both cases, ESP would deadlock or TWDT would trigger.
+  //
+  // This example simulats that by slowing down the chunk callback:
+  // - d=2000 is the delay in ms in the callback
+  // - l=10000 is the length of the response
+  //
+  // time curl -N -v -G -d 'd=2000' -d 'l=10000'  http://192.168.4.1/slow.html --output -
+  //
+  server.on("/slow.html", HTTP_GET, [](AsyncWebServerRequest *request) {
+    requests = requests + 1;
+    uint32_t d = request->getParam("d")->value().toInt();
+    uint32_t l = request->getParam("l")->value().toInt();
+    Serial.printf("d = %" PRIu32 ", l = %" PRIu32 "\n", d, l);
+    AsyncWebServerResponse *response = request->beginChunkedResponse("text/html", [d, l](uint8_t *buffer, size_t maxLen, size_t index) -> size_t {
+      Serial.printf("%u\n", index);
+      // finished ?
+      if (index >= l) {
+        return 0;
+      }
+
+      // slow down the task to simulate some heavy processing, like SD card reading
+      delay(d);
+
+      memset(buffer, characters[charactersIndex], 256);
+      charactersIndex = (charactersIndex + 1) % sizeof(characters);
+      return 256;
+    });
+
+    request->send(response);
+  });
+
+  // SSS endpoint
+  //
+  // launch 16 concurrent workers for 30 seconds
+  // > for i in {1..10}; do ( count=$(gtimeout 30 curl -s -N -H "Accept: text/event-stream" http://192.168.4.1/events 2>&1 | grep -c "^data:"); echo "Total: $count events, $(echo "$count / 4" | bc -l) events / second" ) & done;
+  // > for i in {1..16}; do ( count=$(gtimeout 30 curl -s -N -H "Accept: text/event-stream" http://192.168.4.1/events 2>&1 | grep -c "^data:"); echo "Total: $count events, $(echo "$count / 4" | bc -l) events / second" ) & done;
+  //
+  // With AsyncTCP, with 16 workers: a lot of "Event message queue overflow: discard message", no crash
+  //
+  // Total: 1711 events, 427.75 events / second
+  // Total: 1711 events, 427.75 events / second
+  // Total: 1626 events, 406.50 events / second
+  // Total: 1562 events, 390.50 events / second
+  // Total: 1706 events, 426.50 events / second
+  // Total: 1659 events, 414.75 events / second
+  // Total: 1624 events, 406.00 events / second
+  // Total: 1706 events, 426.50 events / second
+  // Total: 1487 events, 371.75 events / second
+  // Total: 1573 events, 393.25 events / second
+  // Total: 1569 events, 392.25 events / second
+  // Total: 1559 events, 389.75 events / second
+  // Total: 1560 events, 390.00 events / second
+  // Total: 1562 events, 390.50 events / second
+  // Total: 1626 events, 406.50 events / second
+  //
+  // With AsyncTCP, with 10 workers:
+  //
+  // Total: 2038 events, 509.50 events / second
+  // Total: 2120 events, 530.00 events / second
+  // Total: 2119 events, 529.75 events / second
+  // Total: 2038 events, 509.50 events / second
+  // Total: 2037 events, 509.25 events / second
+  // Total: 2119 events, 529.75 events / second
+  // Total: 2119 events, 529.75 events / second
+  // Total: 2120 events, 530.00 events / second
+  // Total: 2038 events, 509.50 events / second
+  // Total: 2038 events, 509.50 events / second
+  //
+  // With AsyncTCPSock, with 16 workers: ESP32 CRASH !!!
+  //
+  // With AsyncTCPSock, with 10 workers:
+  //
+  // Total: 1242 events, 310.50 events / second
+  // Total: 1242 events, 310.50 events / second
+  // Total: 1242 events, 310.50 events / second
+  // Total: 1242 events, 310.50 events / second
+  // Total: 1181 events, 295.25 events / second
+  // Total: 1182 events, 295.50 events / second
+  // Total: 1240 events, 310.00 events / second
+  // Total: 1181 events, 295.25 events / second
+  // Total: 1181 events, 295.25 events / second
+  // Total: 1183 events, 295.75 events / second
+  //
+  server.addHandler(&events);
+
+  server.begin();
+}
+
+static uint32_t lastSSE = 0;
+static uint32_t deltaSSE = 10;
+
+static uint32_t lastHeap = 0;
+
+void loop() {
+  uint32_t now = millis();
+  if (now - lastSSE >= deltaSSE) {
+    events.send(String("ping-") + now, "heartbeat", now);
+    lastSSE = millis();
+  }
+
+#ifdef ESP32
+  if (now - lastHeap >= 2000) {
+    Serial.printf("Uptime: %3lu s, requests: %3u, Free heap: %" PRIu32 "\n", millis() / 1000, requests, ESP.getFreeHeap());
+    lastHeap = now;
+  }
+#endif
+}

Raumtermostat/lib/ESPAsyncWebServer/examples/RateLimit/RateLimit.ino

@@ -0,0 +1,64 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+//
+// Show how to rate limit the server or some endpoints
+//
+
+#include <Arduino.h>
+#ifdef ESP32
+#include <AsyncTCP.h>
+#include <WiFi.h>
+#elif defined(ESP8266)
+#include <ESP8266WiFi.h>
+#include <ESPAsyncTCP.h>
+#elif defined(TARGET_RP2040) || defined(TARGET_RP2350) || defined(PICO_RP2040) || defined(PICO_RP2350)
+#include <RPAsyncTCP.h>
+#include <WiFi.h>
+#endif
+
+#include <ESPAsyncWebServer.h>
+
+static AsyncWebServer server(80);
+static AsyncRateLimitMiddleware rateLimit;
+
+void setup() {
+  Serial.begin(115200);
+
+#ifndef CONFIG_IDF_TARGET_ESP32H2
+  WiFi.mode(WIFI_AP);
+  WiFi.softAP("esp-captive");
+#endif
+
+  // maximum 5 requests per 10 seconds
+  rateLimit.setMaxRequests(5);
+  rateLimit.setWindowSize(10);
+
+  // run quickly several times:
+  //
+  // curl -v http://192.168.4.1/
+  //
+  server.on("/", HTTP_GET, [](AsyncWebServerRequest *request) {
+    request->send(200, "text/plain", "Hello, world!");
+  });
+
+  // run quickly several times:
+  //
+  // curl -v http://192.168.4.1/rate-limited
+  //
+  server
+    .on(
+      "/rate-limited", HTTP_GET,
+      [](AsyncWebServerRequest *request) {
+        request->send(200, "text/plain", "Hello, world!");
+      }
+    )
+    .addMiddleware(&rateLimit);  // only rate limit this endpoint, but could be applied globally to the server
+
+  server.begin();
+}
+
+// not needed
+void loop() {
+  delay(100);
+}

Raumtermostat/lib/ESPAsyncWebServer/examples/Redirect/Redirect.ino

@@ -0,0 +1,48 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+//
+// Shows how to redirect
+//
+
+#include <Arduino.h>
+#ifdef ESP32
+#include <AsyncTCP.h>
+#include <WiFi.h>
+#elif defined(ESP8266)
+#include <ESP8266WiFi.h>
+#include <ESPAsyncTCP.h>
+#elif defined(TARGET_RP2040) || defined(TARGET_RP2350) || defined(PICO_RP2040) || defined(PICO_RP2350)
+#include <RPAsyncTCP.h>
+#include <WiFi.h>
+#endif
+
+#include <ESPAsyncWebServer.h>
+
+static AsyncWebServer server(80);
+
+void setup() {
+  Serial.begin(115200);
+
+#ifndef CONFIG_IDF_TARGET_ESP32H2
+  WiFi.mode(WIFI_AP);
+  WiFi.softAP("esp-captive");
+#endif
+
+  // curl -v http://192.168.4.1/
+  server.on("/", HTTP_GET, [](AsyncWebServerRequest *request) {
+    request->redirect("/index.txt");
+  });
+
+  // curl -v http://192.168.4.1/index.txt
+  server.on("/index.txt", HTTP_GET, [](AsyncWebServerRequest *request) {
+    request->send(200, "text/plain", "Hello, world!");
+  });
+
+  server.begin();
+}
+
+// not needed
+void loop() {
+  delay(100);
+}

Raumtermostat/lib/ESPAsyncWebServer/examples/RequestContinuation/RequestContinuation.ino

@@ -0,0 +1,91 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+//
+// Shows how to use request continuation to pause a request for a long processing task, and be able to resume it later.
+//
+
+#include <Arduino.h>
+#ifdef ESP32
+#include <AsyncTCP.h>
+#include <WiFi.h>
+#elif defined(ESP8266)
+#include <ESP8266WiFi.h>
+#include <ESPAsyncTCP.h>
+#elif defined(TARGET_RP2040) || defined(TARGET_RP2350) || defined(PICO_RP2040) || defined(PICO_RP2350)
+#include <RPAsyncTCP.h>
+#include <WiFi.h>
+#endif
+
+#include <ESPAsyncWebServer.h>
+#include <list>
+#include <mutex>
+
+static AsyncWebServer server(80);
+
+// request handler that is saved from the paused request to communicate with Serial
+static String message;
+static AsyncWebServerRequestPtr serialRequest;
+
+// request handler that is saved from the paused request to communicate with GPIO
+static uint8_t pin = 35;
+static AsyncWebServerRequestPtr gpioRequest;
+
+void setup() {
+  Serial.begin(115200);
+
+#ifndef CONFIG_IDF_TARGET_ESP32H2
+  WiFi.mode(WIFI_AP);
+  WiFi.softAP("esp-captive");
+#endif
+
+  // Post a message that will be sent to the Serial console, and pause the request until the user types a key
+  //
+  // curl -v -X POST -H "Content-Type: application/x-www-form-urlencoded" -d "question=Name%3F%20" http://192.168.4.1/serial
+  //
+  // curl output should show "Answer: [y/n]" as the response
+  server.on("/serial", HTTP_POST, [](AsyncWebServerRequest *request) {
+    message = request->getParam("question", true)->value();
+    serialRequest = request->pause();
+  });
+
+  // Wait for a GPIO to be high
+  //
+  // curl -v http://192.168.4.1/gpio
+  //
+  // curl output should show "GPIO is high!" as the response
+  server.on("/gpio", HTTP_GET, [](AsyncWebServerRequest *request) {
+    gpioRequest = request->pause();
+  });
+
+  pinMode(pin, INPUT);
+
+  server.begin();
+}
+
+void loop() {
+  delay(500);
+
+  // Check for a high voltage on the RX1 pin
+  if (digitalRead(pin) == HIGH) {
+    if (auto request = gpioRequest.lock()) {
+      request->send(200, "text/plain", "GPIO is high!");
+    }
+  }
+
+  // check for an incoming message from the Serial console
+  if (message.length()) {
+    Serial.printf("%s", message.c_str());
+    // drops buffer
+    while (Serial.available()) {
+      Serial.read();
+    }
+    Serial.setTimeout(10000);
+    String response = Serial.readStringUntil('\n');  // waits for a key to be pressed
+    Serial.println();
+    message = emptyString;
+    if (auto request = serialRequest.lock()) {
+      request->send(200, "text/plain", "Answer: " + response);
+    }
+  }
+}

Raumtermostat/lib/ESPAsyncWebServer/examples/RequestContinuationComplete/RequestContinuationComplete.ino

@@ -0,0 +1,165 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+//
+// Shows how to use request continuation to pause a request for a long processing task, and be able to resume it later.
+//
+
+#include <Arduino.h>
+#ifdef ESP32
+#include <AsyncTCP.h>
+#include <WiFi.h>
+#elif defined(ESP8266)
+#include <ESP8266WiFi.h>
+#include <ESPAsyncTCP.h>
+#elif defined(TARGET_RP2040) || defined(TARGET_RP2350) || defined(PICO_RP2040) || defined(PICO_RP2350)
+#include <RPAsyncTCP.h>
+#include <WiFi.h>
+#endif
+
+#include <ESPAsyncWebServer.h>
+
+#include <list>
+#include <memory>
+#include <mutex>
+
+static AsyncWebServer server(80);
+
+// ===============================================================
+// The code below is used to simulate some long running operations
+// ===============================================================
+
+typedef struct {
+  size_t id;
+  AsyncWebServerRequestPtr requestPtr;
+  uint8_t data;
+} LongRunningOperation;
+
+static std::list<std::unique_ptr<LongRunningOperation>> longRunningOperations;
+static size_t longRunningOperationsCount = 0;
+#ifdef ESP32
+static std::mutex longRunningOperationsMutex;
+#endif
+
+static void startLongRunningOperation(AsyncWebServerRequestPtr &&requestPtr) {
+#ifdef ESP32
+  std::lock_guard<std::mutex> lock(longRunningOperationsMutex);
+#endif
+
+  // LongRunningOperation *op = new LongRunningOperation();
+  std::unique_ptr<LongRunningOperation> op(new LongRunningOperation());
+  op->id = ++longRunningOperationsCount;
+  op->data = 10;
+
+  // you need to hold the AsyncWebServerRequestPtr returned by pause();
+  // This object is authorized to leave the scope of the request handler.
+  op->requestPtr = std::move(requestPtr);
+
+  Serial.printf("[%u] Start long running operation for %" PRIu8 " seconds...\n", op->id, op->data);
+  longRunningOperations.push_back(std::move(op));
+}
+
+static bool processLongRunningOperation(LongRunningOperation *op) {
+  // request was deleted ?
+  if (op->requestPtr.expired()) {
+    Serial.printf("[%u] Request was deleted - stopping long running operation\n", op->id);
+    return true;  // operation finished
+  }
+
+  // processing the operation
+  Serial.printf("[%u] Long running operation processing... %" PRIu8 " seconds left\n", op->id, op->data);
+
+  // check if we have finished ?
+  op->data--;
+  if (op->data) {
+    // not finished yet
+    return false;
+  }
+
+  // Try to get access to the request pointer if it is still exist.
+  // If there has been a disconnection during that time, the pointer won't be valid anymore
+  if (auto request = op->requestPtr.lock()) {
+    Serial.printf("[%u] Long running operation finished! Sending back response...\n", op->id);
+    request->send(200, "text/plain", String(op->id) + " ");
+
+  } else {
+    Serial.printf("[%u] Long running operation finished, but request was deleted!\n", op->id);
+  }
+
+  return true;  // operation finished
+}
+
+/// ==========================================================
+
+void setup() {
+  Serial.begin(115200);
+
+#ifndef CONFIG_IDF_TARGET_ESP32H2
+  WiFi.mode(WIFI_AP);
+  WiFi.softAP("esp-captive");
+#endif
+
+  // Add a middleware to see how pausing a request affects the middleware chain
+  server.addMiddleware([](AsyncWebServerRequest *request, ArMiddlewareNext next) {
+    Serial.printf("Middleware chain start\n");
+
+    // continue to the next middleware, and at the end the request handler
+    next();
+
+    // we can check the request pause state after the handler was executed
+    if (request->isPaused()) {
+      Serial.printf("Request was paused!\n");
+    }
+
+    Serial.printf("Middleware chain ends\n");
+  });
+
+  // HOW TO RUN THIS EXAMPLE:
+  //
+  // 1. Open several terminals to trigger some requests concurrently that will be paused with:
+  //    > time curl -v http://192.168.4.1/
+  //
+  // 2. Look at the output of the Serial console to see how the middleware chain is executed
+  //    and to see the long running operations being processed and resume the requests.
+  //
+  // 3. You can try close your curl command to cancel the request and check that the request is deleted.
+  //    Note: in case the network is disconnected, the request will be deleted.
+  //
+  server.on("/", HTTP_GET, [](AsyncWebServerRequest *request) {
+    // Print a message in case the request is disconnected (network disconnection, client close, etc.)
+    request->onDisconnect([]() {
+      Serial.printf("Request was disconnected!\n");
+    });
+
+    // Instruct ESPAsyncWebServer to pause the request and get a AsyncWebServerRequestPtr to be able to access the request later.
+    // The AsyncWebServerRequestPtr is the ONLY object authorized to leave the scope of the request handler.
+    // The Middleware chain will continue to run until the end after this handler exit, but the request will be paused and will not
+    // be sent to the client until send() is called later.
+    Serial.printf("Pausing request...\n");
+    AsyncWebServerRequestPtr requestPtr = request->pause();
+
+    // start our long operation...
+    startLongRunningOperation(std::move(requestPtr));
+  });
+
+  server.begin();
+}
+
+static uint32_t lastTime = 0;
+
+void loop() {
+  if (millis() - lastTime >= 1000) {
+
+#ifdef ESP32
+    Serial.printf("Free heap: %" PRIu32 "\n", ESP.getFreeHeap());
+    std::lock_guard<std::mutex> lock(longRunningOperationsMutex);
+#endif
+
+    // process all long running operations
+    longRunningOperations.remove_if([](const std::unique_ptr<LongRunningOperation> &op) {
+      return processLongRunningOperation(op.get());
+    });
+
+    lastTime = millis();
+  }
+}

Raumtermostat/lib/ESPAsyncWebServer/examples/ResumableDownload/ResumableDownload.ino

@@ -0,0 +1,61 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+//
+// Make sure resumable downloads can be implemented (HEAD request / response and Range header)
+//
+
+#include <Arduino.h>
+#ifdef ESP32
+#include <AsyncTCP.h>
+#include <WiFi.h>
+#elif defined(ESP8266)
+#include <ESP8266WiFi.h>
+#include <ESPAsyncTCP.h>
+#elif defined(TARGET_RP2040) || defined(TARGET_RP2350) || defined(PICO_RP2040) || defined(PICO_RP2350)
+#include <RPAsyncTCP.h>
+#include <WiFi.h>
+#endif
+
+#include <ESPAsyncWebServer.h>
+
+static AsyncWebServer server(80);
+
+void setup() {
+  Serial.begin(115200);
+
+#ifndef CONFIG_IDF_TARGET_ESP32H2
+  WiFi.mode(WIFI_AP);
+  WiFi.softAP("esp-captive");
+#endif
+
+  /*
+    ❯ curl -I -X HEAD http://192.168.4.1/download
+    HTTP/1.1 200 OK
+    Content-Length: 1024
+    Content-Type: application/octet-stream
+    Connection: close
+    Accept-Ranges: bytes
+  */
+  // Ref: https://github.com/mathieucarbou/ESPAsyncWebServer/pull/80
+  server.on("/download", HTTP_HEAD | HTTP_GET, [](AsyncWebServerRequest *request) {
+    if (request->method() == HTTP_HEAD) {
+      AsyncWebServerResponse *response = request->beginResponse(200, "application/octet-stream");
+      response->addHeader(asyncsrv::T_Accept_Ranges, "bytes");
+      response->addHeader(asyncsrv::T_Content_Length, 10);
+      response->setContentLength(1024);  // make sure we can overrides previously set content length
+      response->addHeader(asyncsrv::T_Content_Type, "foo");
+      response->setContentType("application/octet-stream");  // make sure we can overrides previously set content type
+      // ...
+      request->send(response);
+    } else {
+      // ...
+    }
+  });
+
+  server.begin();
+}
+
+void loop() {
+  delay(100);
+}

Raumtermostat/lib/ESPAsyncWebServer/examples/Rewrite/Rewrite.ino

@@ -0,0 +1,52 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+//
+// Shows how to rewrite URLs
+//
+
+#include <Arduino.h>
+#ifdef ESP32
+#include <AsyncTCP.h>
+#include <WiFi.h>
+#elif defined(ESP8266)
+#include <ESP8266WiFi.h>
+#include <ESPAsyncTCP.h>
+#elif defined(TARGET_RP2040) || defined(TARGET_RP2350) || defined(PICO_RP2040) || defined(PICO_RP2350)
+#include <RPAsyncTCP.h>
+#include <WiFi.h>
+#endif
+
+#include <ESPAsyncWebServer.h>
+
+static AsyncWebServer server(80);
+
+void setup() {
+  Serial.begin(115200);
+
+#ifndef CONFIG_IDF_TARGET_ESP32H2
+  WiFi.mode(WIFI_AP);
+  WiFi.softAP("esp-captive");
+#endif
+
+  // curl -v http://192.168.4.1/index.txt
+  server.on("/index.txt", HTTP_GET, [](AsyncWebServerRequest *request) {
+    request->send(200, "text/plain", "Hello, world!");
+  });
+
+  // curl -v http://192.168.4.1/index.txt
+  server.on("/index.html", HTTP_GET, [](AsyncWebServerRequest *request) {
+    request->send(200, "text/html", "<h1>Hello, world!</h1>");
+  });
+
+  // curl -v http://192.168.4.1/
+  server.rewrite("/", "/index.html");
+  server.rewrite("/index.txt", "/index.html");  // will hide the .txt file
+
+  server.begin();
+}
+
+// not needed
+void loop() {
+  delay(100);
+}

Raumtermostat/lib/ESPAsyncWebServer/examples/ServerSentEvents/ServerSentEvents.ino

@@ -0,0 +1,105 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+//
+// SSE example
+//
+
+#include <Arduino.h>
+#ifdef ESP32
+#include <AsyncTCP.h>
+#include <WiFi.h>
+#elif defined(ESP8266)
+#include <ESP8266WiFi.h>
+#include <ESPAsyncTCP.h>
+#elif defined(TARGET_RP2040) || defined(TARGET_RP2350) || defined(PICO_RP2040) || defined(PICO_RP2350)
+#include <RPAsyncTCP.h>
+#include <WiFi.h>
+#endif
+
+#include <ESPAsyncWebServer.h>
+
+static const char *htmlContent PROGMEM = R"(
+<!DOCTYPE html>
+<html>
+<head>
+  <title>Server-Sent Events</title>
+  <script>
+    if (!!window.EventSource) {
+      var source = new EventSource('/events');
+      source.addEventListener('open', function(e) {
+        console.log("Events Connected");
+      }, false);
+      source.addEventListener('error', function(e) {
+        if (e.target.readyState != EventSource.OPEN) {
+          console.log("Events Disconnected");
+        }
+      }, false);
+      source.addEventListener('message', function(e) {
+        console.log("message", e.data);
+      }, false);
+      source.addEventListener('heartbeat', function(e) {
+        console.log("heartbeat", e.data);
+      }, false);
+    }
+  </script>
+</head>
+<body>
+  <h1>Open your browser console!</h1>
+</body>
+</html>
+)";
+
+static const size_t htmlContentLength = strlen_P(htmlContent);
+
+static AsyncWebServer server(80);
+static AsyncEventSource events("/events");
+
+void setup() {
+  Serial.begin(115200);
+
+#ifndef CONFIG_IDF_TARGET_ESP32H2
+  WiFi.mode(WIFI_AP);
+  WiFi.softAP("esp-captive");
+#endif
+
+  // curl -v http://192.168.4.1/
+  server.on("/", HTTP_GET, [](AsyncWebServerRequest *request) {
+    // need to cast to uint8_t*
+    // if you do not, the const char* will be copied in a temporary String buffer
+    request->send(200, "text/html", (uint8_t *)htmlContent, htmlContentLength);
+  });
+
+  events.onConnect([](AsyncEventSourceClient *client) {
+    Serial.printf("SSE Client connected! ID: %" PRIu32 "\n", client->lastId());
+    client->send("hello!", NULL, millis(), 1000);
+  });
+
+  events.onDisconnect([](AsyncEventSourceClient *client) {
+    Serial.printf("SSE Client disconnected! ID: %" PRIu32 "\n", client->lastId());
+  });
+
+  server.addHandler(&events);
+
+  server.begin();
+}
+
+static uint32_t lastSSE = 0;
+static uint32_t deltaSSE = 3000;
+
+static uint32_t lastHeap = 0;
+
+void loop() {
+  uint32_t now = millis();
+  if (now - lastSSE >= deltaSSE) {
+    events.send(String("ping-") + now, "heartbeat", now);
+    lastSSE = millis();
+  }
+
+#ifdef ESP32
+  if (now - lastHeap >= 2000) {
+    Serial.printf("Free heap: %" PRIu32 "\n", ESP.getFreeHeap());
+    lastHeap = now;
+  }
+#endif
+}

Raumtermostat/lib/ESPAsyncWebServer/examples/ServerSentEvents_PR156/ServerSentEvents_PR156.ino

@@ -0,0 +1,141 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+//
+// SSE example
+//
+
+#include <Arduino.h>
+#ifdef ESP32
+#include <AsyncTCP.h>
+#include <WiFi.h>
+#elif defined(ESP8266)
+#include <ESP8266WiFi.h>
+#include <ESPAsyncTCP.h>
+#elif defined(TARGET_RP2040) || defined(TARGET_RP2350) || defined(PICO_RP2040) || defined(PICO_RP2350)
+#include <RPAsyncTCP.h>
+#include <WiFi.h>
+#endif
+
+#include <ESPAsyncWebServer.h>
+
+static const char *htmlContent PROGMEM = R"(
+<!DOCTYPE html>
+<html>
+<head>
+  <title>Server-Sent Events</title>
+  <script>
+    if (!!window.EventSource) {
+      var source = new EventSource('/events');
+      source.onopen = function(e) {
+        console.log("Events Connected");
+      };
+      source.onerror = function(e) {
+        if (e.target.readyState != EventSource.OPEN) {
+          console.log("Events Disconnected");
+        }
+        // Uncomment below to prevent the client from proactively establishing a new connection.
+        // source.close();
+      };
+      source.onmessage = function(e) {
+        console.log("Message: " + e.data);
+      };
+      source.addEventListener('heartbeat', function(e) {
+        console.log("Heartbeat", e.data);
+      }, false);
+    }
+  </script>
+</head>
+<body>
+  <h1>Open your browser console!</h1>
+</body>
+</html>
+)";
+
+static const size_t htmlContentLength = strlen_P(htmlContent);
+
+static AsyncWebServer server(80);
+static AsyncEventSource events("/events");
+
+static volatile size_t connectionCount = 0;
+static volatile uint32_t timestampConnected = 0;
+static constexpr uint32_t timeoutClose = 15000;
+
+void setup() {
+  Serial.begin(115200);
+
+#ifndef CONFIG_IDF_TARGET_ESP32H2
+  WiFi.mode(WIFI_AP);
+  WiFi.softAP("esp-captive");
+#endif
+
+  // curl -v http://192.168.4.1/
+  server.on("/", HTTP_GET, [](AsyncWebServerRequest *request) {
+    // need to cast to uint8_t*
+    // if you do not, the const char* will be copied in a temporary String buffer
+    request->send(200, "text/html", (uint8_t *)htmlContent, htmlContentLength);
+  });
+
+  events.onConnect([](AsyncEventSourceClient *client) {
+    /**
+     * @brief: Purpose for a test case: count() function
+     * Task watchdog shall be triggered due to a self-deadlock by mutex handling of the AsyncEventSource.
+     *
+     * E (61642) task_wdt: Task watchdog got triggered. The following tasks did not reset the watchdog in time:
+     * E (61642) task_wdt:  - async_tcp (CPU 0/1)
+     *
+     * Resolve: using recursive_mutex insteads of mutex.
+    */
+    connectionCount = events.count();
+
+    timestampConnected = millis();
+    Serial.printf("SSE Client connected! ID: %" PRIu32 "\n", client->lastId());
+    client->send("hello!", NULL, millis(), 1000);
+    Serial.printf("Number of connected clients: %u\n", connectionCount);
+  });
+
+  events.onDisconnect([](AsyncEventSourceClient *client) {
+    connectionCount = events.count();
+    Serial.printf("SSE Client disconnected! ID: %" PRIu32 "\n", client->lastId());
+    Serial.printf("Number of connected clients: %u\n", connectionCount);
+  });
+
+  server.addHandler(&events);
+
+  server.begin();
+}
+
+static constexpr uint32_t deltaSSE = 3000;
+static uint32_t lastSSE = 0;
+static uint32_t lastHeap = 0;
+
+void loop() {
+  uint32_t now = millis();
+  if (connectionCount > 0) {
+    if (now - lastSSE >= deltaSSE) {
+      events.send(String("ping-") + now, "heartbeat", now);
+      lastSSE = millis();
+    }
+
+    /**
+     * @brief: Purpose for a test case: close() function
+     * Task watchdog shall be triggered due to a self-deadlock by mutex handling of the AsyncEventSource.
+     *
+     * E (61642) task_wdt: Task watchdog got triggered. The following tasks did not reset the watchdog in time:
+     * E (61642) task_wdt:  - async_tcp (CPU 0/1)
+     *
+     * Resolve: using recursive_mutex insteads of mutex.
+    */
+    if (now - timestampConnected >= timeoutClose) {
+      Serial.printf("SSE Clients close\n");
+      events.close();
+    }
+  }
+
+#ifdef ESP32
+  if (now - lastHeap >= 2000) {
+    Serial.printf("Free heap: %" PRIu32 "\n", ESP.getFreeHeap());
+    lastHeap = now;
+  }
+#endif
+}

Raumtermostat/lib/ESPAsyncWebServer/examples/ServerState/ServerState.ino

@@ -0,0 +1,66 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+//
+// Server state example
+//
+
+#include <Arduino.h>
+#ifdef ESP32
+#include <AsyncTCP.h>
+#include <WiFi.h>
+#elif defined(ESP8266)
+#include <ESP8266WiFi.h>
+#include <ESPAsyncTCP.h>
+#elif defined(TARGET_RP2040) || defined(TARGET_RP2350) || defined(PICO_RP2040) || defined(PICO_RP2350)
+#include <RPAsyncTCP.h>
+#include <WiFi.h>
+#endif
+
+#include <ESPAsyncWebServer.h>
+
+static AsyncWebServer server1(80);
+static AsyncWebServer server2(80);
+
+void setup() {
+  Serial.begin(115200);
+
+#ifndef CONFIG_IDF_TARGET_ESP32H2
+  WiFi.mode(WIFI_AP);
+  WiFi.softAP("esp-captive");
+#endif
+
+  // server state returns one of the tcp_state enum values:
+  // enum tcp_state {
+  //   CLOSED      = 0,
+  //   LISTEN      = 1,
+  //   SYN_SENT    = 2,
+  //   SYN_RCVD    = 3,
+  //   ESTABLISHED = 4,
+  //   FIN_WAIT_1  = 5,
+  //   FIN_WAIT_2  = 6,
+  //   CLOSE_WAIT  = 7,
+  //   CLOSING     = 8,
+  //   LAST_ACK    = 9,
+  //   TIME_WAIT   = 10
+  // };
+
+  assert(server1.state() == tcp_state::CLOSED);
+  assert(server2.state() == tcp_state::CLOSED);
+
+  server1.begin();
+
+  assert(server1.state() == tcp_state::LISTEN);
+  assert(server2.state() == tcp_state::CLOSED);
+
+  server2.begin();
+
+  assert(server1.state() == tcp_state::LISTEN);
+  assert(server2.state() == tcp_state::CLOSED);
+
+  Serial.println("Done!");
+}
+
+void loop() {
+  delay(100);
+}

Raumtermostat/lib/ESPAsyncWebServer/examples/SkipServerMiddleware/SkipServerMiddleware.ino

@@ -0,0 +1,73 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+//
+// Authentication and authorization middlewares
+//
+
+#include <Arduino.h>
+#ifdef ESP32
+#include <AsyncTCP.h>
+#include <WiFi.h>
+#elif defined(ESP8266)
+#include <ESP8266WiFi.h>
+#include <ESPAsyncTCP.h>
+#elif defined(TARGET_RP2040) || defined(TARGET_RP2350) || defined(PICO_RP2040) || defined(PICO_RP2350)
+#include <RPAsyncTCP.h>
+#include <WiFi.h>
+#endif
+
+#include <ESPAsyncWebServer.h>
+
+static AsyncWebServer server(80);
+
+static AsyncAuthenticationMiddleware basicAuth;
+static AsyncLoggingMiddleware logging;
+
+void setup() {
+  Serial.begin(115200);
+
+#ifndef CONFIG_IDF_TARGET_ESP32H2
+  WiFi.mode(WIFI_AP);
+  WiFi.softAP("esp-captive");
+#endif
+
+  // basic authentication
+  basicAuth.setUsername("admin");
+  basicAuth.setPassword("admin");
+  basicAuth.setRealm("MyApp");
+  basicAuth.setAuthFailureMessage("Authentication failed");
+  basicAuth.setAuthType(AsyncAuthType::AUTH_BASIC);
+  basicAuth.generateHash();  // precompute hash (optional but recommended)
+
+  // logging middleware
+  logging.setEnabled(true);
+  logging.setOutput(Serial);
+
+  // we apply auth middleware to the server globally
+  server.addMiddleware(&basicAuth);
+
+  // protected endpoint: requires basic authentication
+  // curl -v -u admin:admin  http://192.168.4.1/
+  server.on("/", HTTP_GET, [](AsyncWebServerRequest *request) {
+    request->send(200, "text/plain", "Hello, world!");
+  });
+
+  // we skip all global middleware from the catchall handler
+  server.catchAllHandler().skipServerMiddlewares();
+  // we apply a specific middleware to the catchall handler only to log requests without a handler defined
+  server.catchAllHandler().addMiddleware(&logging);
+
+  // standard 404 handler: will display the request in the console i na curl-like style
+  // curl -v -H "Foo: Bar"  http://192.168.4.1/foo
+  server.onNotFound([](AsyncWebServerRequest *request) {
+    request->send(404, "text/plain", "Not found");
+  });
+
+  server.begin();
+}
+
+// not needed
+void loop() {
+  delay(100);
+}

Raumtermostat/lib/ESPAsyncWebServer/examples/SlowChunkResponse/SlowChunkResponse.ino

@@ -0,0 +1,152 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+//
+// Simulate a slow response in a chunk response (like file download from SD Card)
+// poll events will be throttled.
+//
+
+#include <Arduino.h>
+#ifdef ESP32
+#include <AsyncTCP.h>
+#include <WiFi.h>
+#elif defined(ESP8266)
+#include <ESP8266WiFi.h>
+#include <ESPAsyncTCP.h>
+#elif defined(TARGET_RP2040) || defined(TARGET_RP2350) || defined(PICO_RP2040) || defined(PICO_RP2350)
+#include <RPAsyncTCP.h>
+#include <WiFi.h>
+#endif
+
+#include <ESPAsyncWebServer.h>
+
+static AsyncWebServer server(80);
+
+static const char *htmlContent PROGMEM = R"(
+<!DOCTYPE html>
+<html>
+<head>
+    <title>Sample HTML</title>
+</head>
+<body>
+    <h1>Hello, World!</h1>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+</body>
+</html>
+)";
+
+static const size_t htmlContentLength = strlen_P(htmlContent);
+static constexpr char characters[] = "0123456789ABCDEF";
+static size_t charactersIndex = 0;
+
+void setup() {
+  Serial.begin(115200);
+
+#ifndef CONFIG_IDF_TARGET_ESP32H2
+  WiFi.mode(WIFI_AP);
+  WiFi.softAP("esp-captive");
+#endif
+
+  // curl -v http://192.168.4.1/
+  server.on("/", HTTP_GET, [](AsyncWebServerRequest *request) {
+    // need to cast to uint8_t*
+    // if you do not, the const char* will be copied in a temporary String buffer
+    request->send(200, "text/html", (uint8_t *)htmlContent, htmlContentLength);
+  });
+
+  // IMPORTANT - DO NOT WRITE SUCH CODE IN PRODUCTON !
+  //
+  // This example simulates the slowdown that can happen when:
+  // - downloading a huge file from sdcard
+  // - doing some file listing on SDCard because it is horribly slow to get a file listing with file stats on SDCard.
+  // So in both cases, ESP would deadlock or TWDT would trigger.
+  //
+  // This example simulats that by slowing down the chunk callback:
+  // - d=2000 is the delay in ms in the callback
+  // - l=10000 is the length of the response
+  //
+  // time curl -N -v -G -d 'd=2000' -d 'l=10000'  http://192.168.4.1/slow.html --output -
+  //
+  server.on("/slow.html", HTTP_GET, [](AsyncWebServerRequest *request) {
+    uint32_t d = request->getParam("d")->value().toInt();
+    uint32_t l = request->getParam("l")->value().toInt();
+    Serial.printf("d = %" PRIu32 ", l = %" PRIu32 "\n", d, l);
+    AsyncWebServerResponse *response = request->beginChunkedResponse("text/html", [d, l](uint8_t *buffer, size_t maxLen, size_t index) -> size_t {
+      Serial.printf("%u\n", index);
+      // finished ?
+      if (index >= l) {
+        return 0;
+      }
+
+      // slow down the task to simulate some heavy processing, like SD card reading
+      delay(d);
+
+      memset(buffer, characters[charactersIndex], 256);
+      charactersIndex = (charactersIndex + 1) % sizeof(characters);
+      return 256;
+    });
+
+    request->send(response);
+  });
+
+  server.begin();
+}
+
+static uint32_t lastHeap = 0;
+
+void loop() {
+#ifdef ESP32
+  uint32_t now = millis();
+  if (now - lastHeap >= 2000) {
+    Serial.printf("Free heap: %" PRIu32 "\n", ESP.getFreeHeap());
+    lastHeap = now;
+  }
+#endif
+}

Raumtermostat/lib/ESPAsyncWebServer/examples/StaticFile/StaticFile.ino

@@ -0,0 +1,144 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+//
+// Shows how to serve a static file
+//
+
+#include <Arduino.h>
+#ifdef ESP32
+#include <AsyncTCP.h>
+#include <WiFi.h>
+#elif defined(ESP8266)
+#include <ESP8266WiFi.h>
+#include <ESPAsyncTCP.h>
+#elif defined(TARGET_RP2040) || defined(TARGET_RP2350) || defined(PICO_RP2040) || defined(PICO_RP2350)
+#include <RPAsyncTCP.h>
+#include <WiFi.h>
+#endif
+
+#include <ESPAsyncWebServer.h>
+#include <LittleFS.h>
+
+static AsyncWebServer server(80);
+
+static const char *htmlContent PROGMEM = R"(
+<!DOCTYPE html>
+<html>
+<head>
+    <title>Sample HTML</title>
+</head>
+<body>
+    <h1>Hello, World!</h1>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+</body>
+</html>
+)";
+
+static const size_t htmlContentLength = strlen_P(htmlContent);
+
+void setup() {
+  Serial.begin(115200);
+
+#ifndef CONFIG_IDF_TARGET_ESP32H2
+  WiFi.mode(WIFI_AP);
+  WiFi.softAP("esp-captive");
+#endif
+
+#ifdef ESP32
+  LittleFS.begin(true);
+#else
+  LittleFS.begin();
+#endif
+
+  {
+    File f = LittleFS.open("/index.html", "w");
+    assert(f);
+    f.print(htmlContent);
+    f.close();
+  }
+
+  LittleFS.mkdir("/files");
+
+  {
+    File f = LittleFS.open("/files/a.txt", "w");
+    assert(f);
+    f.print("Hello from a.txt");
+    f.close();
+  }
+
+  {
+    File f = LittleFS.open("/files/b.txt", "w");
+    assert(f);
+    f.print("Hello from b.txt");
+    f.close();
+  }
+
+  // curl -v http://192.168.4.1/
+  server.on("/", HTTP_GET, [](AsyncWebServerRequest *request) {
+    request->redirect("/index.html");
+  });
+
+  // curl -v http://192.168.4.1/index.html
+  server.serveStatic("/index.html", LittleFS, "/index.html");
+
+  // Example to serve a directory content
+  // curl -v http://192.168.4.1/base/ => serves a.txt
+  // curl -v http://192.168.4.1/base/a.txt => serves a.txt
+  // curl -v http://192.168.4.1/base/b.txt => serves b.txt
+  server.serveStatic("/base", LittleFS, "/files").setDefaultFile("a.txt");
+
+  server.begin();
+}
+
+// not needed
+void loop() {
+  delay(100);
+}

Raumtermostat/lib/ESPAsyncWebServer/examples/Templates/Templates.ino

@@ -0,0 +1,99 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+//
+// Shows how to serve a static and dynamic template
+//
+
+#include <Arduino.h>
+#ifdef ESP32
+#include <AsyncTCP.h>
+#include <WiFi.h>
+#elif defined(ESP8266)
+#include <ESP8266WiFi.h>
+#include <ESPAsyncTCP.h>
+#elif defined(TARGET_RP2040) || defined(TARGET_RP2350) || defined(PICO_RP2040) || defined(PICO_RP2350)
+#include <RPAsyncTCP.h>
+#include <WiFi.h>
+#endif
+
+#include <ESPAsyncWebServer.h>
+#include <LittleFS.h>
+
+static AsyncWebServer server(80);
+
+static const char *htmlContent PROGMEM = R"(
+<!DOCTYPE html>
+<html>
+<body>
+    <h1>Hello, %USER%</h1>
+</body>
+</html>
+)";
+
+static const size_t htmlContentLength = strlen_P(htmlContent);
+
+void setup() {
+  Serial.begin(115200);
+
+#ifndef CONFIG_IDF_TARGET_ESP32H2
+  WiFi.mode(WIFI_AP);
+  WiFi.softAP("esp-captive");
+#endif
+
+#ifdef ESP32
+  LittleFS.begin(true);
+#else
+  LittleFS.begin();
+#endif
+
+  {
+    File f = LittleFS.open("/template.html", "w");
+    assert(f);
+    f.print(htmlContent);
+    f.close();
+  }
+
+  // Serve the static template file
+  //
+  // curl -v http://192.168.4.1/template.html
+  server.serveStatic("/template.html", LittleFS, "/template.html");
+
+  // Serve the static template with a template processor
+  //
+  // ServeStatic static is used to serve static output which never changes over time.
+  // This special endpoints automatically adds caching headers.
+  // If a template processor is used, it must ensure that the outputted content will always be the same over time and never changes.
+  // Otherwise, do not use serveStatic.
+  // Example below: IP never changes.
+  //
+  // curl -v http://192.168.4.1/index.html
+  server.serveStatic("/index.html", LittleFS, "/template.html").setTemplateProcessor([](const String &var) -> String {
+    if (var == "USER") {
+      return "Bob";
+    }
+    return emptyString;
+  });
+
+  // Serve a template with dynamic content
+  //
+  // to serve a template with dynamic content (output changes over time), use normal
+  // Example below: content changes over tinme do not use serveStatic.
+  //
+  // curl -v http://192.168.4.1/dynamic.html
+  server.on("/dynamic.html", HTTP_GET, [](AsyncWebServerRequest *request) {
+    request->send(LittleFS, "/template.html", "text/html", false, [](const String &var) -> String {
+      if (var == "USER") {
+        return String("Bob ") + millis();
+      }
+      return emptyString;
+    });
+  });
+
+  server.begin();
+}
+
+// not needed
+void loop() {
+  delay(100);
+}

Raumtermostat/lib/ESPAsyncWebServer/examples/Upload/Upload.ino

@@ -0,0 +1,171 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+//
+// Demo text, binary and file upload
+//
+
+#include <Arduino.h>
+#ifdef ESP32
+#include <AsyncTCP.h>
+#include <WiFi.h>
+#elif defined(ESP8266)
+#include <ESP8266WiFi.h>
+#include <ESPAsyncTCP.h>
+#elif defined(TARGET_RP2040) || defined(TARGET_RP2350) || defined(PICO_RP2040) || defined(PICO_RP2350)
+#include <RPAsyncTCP.h>
+#include <WiFi.h>
+#endif
+
+#include <ESPAsyncWebServer.h>
+#include <StreamString.h>
+#include <LittleFS.h>
+
+static AsyncWebServer server(80);
+
+void setup() {
+  Serial.begin(115200);
+
+  if (!LittleFS.begin()) {
+    LittleFS.format();
+    LittleFS.begin();
+  }
+
+#ifndef CONFIG_IDF_TARGET_ESP32H2
+  WiFi.mode(WIFI_AP);
+  WiFi.softAP("esp-captive");
+#endif
+
+  // 1. Generate a Lorem_ipsum.txt file of about 20KB of text
+  //
+  // 3. Run: curl -v -F "data=@Lorem_ipsum.txt" http://192.168.4.1/upload/text
+  //
+  server.on(
+    "/upload/text", HTTP_POST,
+    [](AsyncWebServerRequest *request) {
+      if (!request->_tempObject) {
+        return request->send(400, "text/plain", "Nothing uploaded");
+      }
+      StreamString *buffer = reinterpret_cast<StreamString *>(request->_tempObject);
+      Serial.printf("Text uploaded:\n%s\n", buffer->c_str());
+      delete buffer;
+      request->_tempObject = nullptr;
+      request->send(200, "text/plain", "OK");
+    },
+    [](AsyncWebServerRequest *request, String filename, size_t index, uint8_t *data, size_t len, bool final) {
+      Serial.printf("Upload[%s]: start=%u, len=%u, final=%d\n", filename.c_str(), index, len, final);
+
+      if (!index) {
+        // first pass
+        StreamString *buffer = new StreamString();
+        size_t size = std::max(4094l, request->header("Content-Length").toInt());
+        Serial.printf("Allocating string buffer of %u bytes\n", size);
+        if (!buffer->reserve(size)) {
+          delete buffer;
+          request->abort();
+        }
+        request->_tempObject = buffer;
+      }
+
+      if (len) {
+        reinterpret_cast<StreamString *>(request->_tempObject)->write(data, len);
+      }
+    }
+  );
+
+  // 1. Generate a Lorem_ipsum.txt file of about 20KB of text
+  //
+  // 3. Run: curl -v -F "data=@Lorem_ipsum.txt" http://192.168.4.1/upload/file
+  //
+  server.on(
+    "/upload/file", HTTP_POST,
+    [](AsyncWebServerRequest *request) {
+      if (request->getResponse()) {
+        // 400 File not available for writing
+        return;
+      }
+
+      if (!LittleFS.exists("/my_file.txt")) {
+        return request->send(400, "text/plain", "Nothing uploaded");
+      }
+
+      // sends back the uploaded file
+      request->send(LittleFS, "/my_file.txt", "text/plain");
+    },
+    [](AsyncWebServerRequest *request, String filename, size_t index, uint8_t *data, size_t len, bool final) {
+      Serial.printf("Upload[%s]: start=%u, len=%u, final=%d\n", filename.c_str(), index, len, final);
+
+      if (!index) {
+        request->_tempFile = LittleFS.open("/my_file.txt", "w");
+
+        if (!request->_tempFile) {
+          request->send(400, "text/plain", "File not available for writing");
+        }
+      }
+      if (len) {
+        request->_tempFile.write(data, len);
+      }
+      if (final) {
+        request->_tempFile.close();
+      }
+    }
+  );
+
+  //
+  // Upload a binary file: curl -v -F "data=@file.mp3" http://192.168.4.1/upload/binary
+  //
+  server.on(
+    "/upload/binary", HTTP_POST,
+    [](AsyncWebServerRequest *request) {
+      // response already set ?
+      if (request->getResponse()) {
+        // 400 No Content-Length
+        return;
+      }
+
+      // nothing uploaded ?
+      if (!request->_tempObject) {
+        return request->send(400, "text/plain", "Nothing uploaded");
+      }
+
+      uint8_t *buffer = reinterpret_cast<uint8_t *>(request->_tempObject);
+      // process the buffer
+
+      delete buffer;
+      request->_tempObject = nullptr;
+
+      request->send(200, "text/plain", "OK");
+    },
+    [](AsyncWebServerRequest *request, String filename, size_t index, uint8_t *data, size_t len, bool final) {
+      Serial.printf("Upload[%s]: start=%u, len=%u, final=%d\n", filename.c_str(), index, len, final);
+
+      // first pass ?
+      if (!index) {
+        size_t size = request->header("Content-Length").toInt();
+        if (!size) {
+          request->send(400, "text/plain", "No Content-Length");
+        } else {
+          Serial.printf("Allocating buffer of %u bytes\n", size);
+          uint8_t *buffer = new (std::nothrow) uint8_t[size];
+          if (!buffer) {
+            // not enough memory
+            request->abort();
+          } else {
+            request->_tempObject = buffer;
+          }
+        }
+      }
+
+      if (len) {
+        memcpy(reinterpret_cast<uint8_t *>(request->_tempObject) + index, data, len);
+      }
+    }
+  );
+
+  server.begin();
+}
+
+// not needed
+void loop() {
+  delay(100);
+}

Raumtermostat/lib/ESPAsyncWebServer/examples/WebSocket/WebSocket.ino

@@ -0,0 +1,115 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+//
+// WebSocket example
+//
+
+#include <Arduino.h>
+#ifdef ESP32
+#include <AsyncTCP.h>
+#include <WiFi.h>
+#elif defined(ESP8266)
+#include <ESP8266WiFi.h>
+#include <ESPAsyncTCP.h>
+#elif defined(TARGET_RP2040) || defined(TARGET_RP2350) || defined(PICO_RP2040) || defined(PICO_RP2350)
+#include <RPAsyncTCP.h>
+#include <WiFi.h>
+#endif
+
+#include <ESPAsyncWebServer.h>
+
+static AsyncWebServer server(80);
+static AsyncWebSocket ws("/ws");
+
+void setup() {
+  Serial.begin(115200);
+
+#ifndef CONFIG_IDF_TARGET_ESP32H2
+  WiFi.mode(WIFI_AP);
+  WiFi.softAP("esp-captive");
+#endif
+
+  //
+  // Run in terminal 1: websocat ws://192.168.4.1/ws => should stream data
+  // Run in terminal 2: websocat ws://192.168.4.1/ws => should stream data
+  // Run in terminal 3: websocat ws://192.168.4.1/ws => should fail:
+  //
+  // To send a message to the WebSocket server:
+  //
+  // echo "Hello!" | websocat ws://192.168.4.1/ws
+  //
+  ws.onEvent([](AsyncWebSocket *server, AsyncWebSocketClient *client, AwsEventType type, void *arg, uint8_t *data, size_t len) {
+    (void)len;
+
+    if (type == WS_EVT_CONNECT) {
+      ws.textAll("new client connected");
+      Serial.println("ws connect");
+      client->setCloseClientOnQueueFull(false);
+      client->ping();
+
+    } else if (type == WS_EVT_DISCONNECT) {
+      ws.textAll("client disconnected");
+      Serial.println("ws disconnect");
+
+    } else if (type == WS_EVT_ERROR) {
+      Serial.println("ws error");
+
+    } else if (type == WS_EVT_PONG) {
+      Serial.println("ws pong");
+
+    } else if (type == WS_EVT_DATA) {
+      AwsFrameInfo *info = (AwsFrameInfo *)arg;
+      Serial.printf("index: %" PRIu64 ", len: %" PRIu64 ", final: %" PRIu8 ", opcode: %" PRIu8 "\n", info->index, info->len, info->final, info->opcode);
+      String msg = "";
+      if (info->final && info->index == 0 && info->len == len) {
+        if (info->opcode == WS_TEXT) {
+          data[len] = 0;
+          Serial.printf("ws text: %s\n", (char *)data);
+        }
+      }
+    }
+  });
+
+  // shows how to prevent a third WS client to connect
+  server.addHandler(&ws).addMiddleware([](AsyncWebServerRequest *request, ArMiddlewareNext next) {
+    // ws.count() is the current count of WS clients: this one is trying to upgrade its HTTP connection
+    if (ws.count() > 1) {
+      // if we have 2 clients or more, prevent the next one to connect
+      request->send(503, "text/plain", "Server is busy");
+    } else {
+      // process next middleware and at the end the handler
+      next();
+    }
+  });
+
+  server.addHandler(&ws);
+
+  server.begin();
+}
+
+static uint32_t lastWS = 0;
+static uint32_t deltaWS = 100;
+
+static uint32_t lastHeap = 0;
+
+void loop() {
+  uint32_t now = millis();
+
+  if (now - lastWS >= deltaWS) {
+    ws.printfAll("kp%.4f", (10.0 / 3.0));
+    lastWS = millis();
+  }
+
+  if (now - lastHeap >= 2000) {
+    Serial.printf("Connected clients: %u / %u total\n", ws.count(), ws.getClients().size());
+
+    // this can be called to also set a soft limit on the number of connected clients
+    ws.cleanupClients(2);  // no more than 2 clients
+
+#ifdef ESP32
+    Serial.printf("Free heap: %" PRIu32 "\n", ESP.getFreeHeap());
+#endif
+    lastHeap = now;
+  }
+}

Raumtermostat/lib/ESPAsyncWebServer/examples/WebSocketEasy/WebSocketEasy.ino

@@ -0,0 +1,124 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+//
+// WebSocket example using the easy to use AsyncWebSocketMessageHandler handler that only supports unfragmented messages
+//
+
+#include <Arduino.h>
+#ifdef ESP32
+#include <AsyncTCP.h>
+#include <WiFi.h>
+#elif defined(ESP8266)
+#include <ESP8266WiFi.h>
+#include <ESPAsyncTCP.h>
+#elif defined(TARGET_RP2040) || defined(TARGET_RP2350) || defined(PICO_RP2040) || defined(PICO_RP2350)
+#include <RPAsyncTCP.h>
+#include <WiFi.h>
+#endif
+
+#include <ESPAsyncWebServer.h>
+
+static AsyncWebServer server(80);
+
+// create an easy-to-use handler
+static AsyncWebSocketMessageHandler wsHandler;
+
+// add it to the websocket server
+static AsyncWebSocket ws("/ws", wsHandler.eventHandler());
+
+// alternatively you can do as usual:
+//
+// static AsyncWebSocket ws("/ws");
+// ws.onEvent(wsHandler.eventHandler());
+
+static const char *htmlContent PROGMEM = R"(
+<!DOCTYPE html>
+<html>
+<head>
+  <title>WebSocket</title>
+</head>
+<body>
+  <h1>WebSocket Example</h1>
+  <>Open your browser console!</p>
+  <input type="text" id="message" placeholder="Type a message">
+  <button onclick='sendMessage()'>Send</button>
+  <script>
+    var ws = new WebSocket('ws://192.168.4.1/ws');
+    ws.onopen = function() {
+      console.log("WebSocket connected");
+    };
+    ws.onmessage = function(event) {
+      console.log("WebSocket message: " + event.data);
+    };
+    ws.onclose = function() {
+      console.log("WebSocket closed");
+    };
+    ws.onerror = function(error) {
+      console.log("WebSocket error: " + error);
+    };
+    function sendMessage() {
+      var message = document.getElementById("message").value;
+      ws.send(message);
+      console.log("WebSocket sent: " + message);
+    }
+  </script>
+</body>
+</html>
+  )";
+static const size_t htmlContentLength = strlen_P(htmlContent);
+
+void setup() {
+  Serial.begin(115200);
+
+#ifndef CONFIG_IDF_TARGET_ESP32H2
+  WiFi.mode(WIFI_AP);
+  WiFi.softAP("esp-captive");
+#endif
+
+  // serves root html page
+  server.on("/", HTTP_GET, [](AsyncWebServerRequest *request) {
+    request->send(200, "text/html", (const uint8_t *)htmlContent, htmlContentLength);
+  });
+
+  wsHandler.onConnect([](AsyncWebSocket *server, AsyncWebSocketClient *client) {
+    Serial.printf("Client %" PRIu32 " connected\n", client->id());
+    server->textAll("New client: " + String(client->id()));
+  });
+
+  wsHandler.onDisconnect([](AsyncWebSocket *server, uint32_t clientId) {
+    Serial.printf("Client %" PRIu32 " disconnected\n", clientId);
+    server->textAll("Client " + String(clientId) + " disconnected");
+  });
+
+  wsHandler.onError([](AsyncWebSocket *server, AsyncWebSocketClient *client, uint16_t errorCode, const char *reason, size_t len) {
+    Serial.printf("Client %" PRIu32 " error: %" PRIu16 ": %s\n", client->id(), errorCode, reason);
+  });
+
+  wsHandler.onMessage([](AsyncWebSocket *server, AsyncWebSocketClient *client, const uint8_t *data, size_t len) {
+    Serial.printf("Client %" PRIu32 " data: %s\n", client->id(), (const char *)data);
+  });
+
+  wsHandler.onFragment([](AsyncWebSocket *server, AsyncWebSocketClient *client, const AwsFrameInfo *frameInfo, const uint8_t *data, size_t len) {
+    Serial.printf("Client %" PRIu32 " fragment %" PRIu32 ": %s\n", client->id(), frameInfo->num, (const char *)data);
+  });
+
+  server.addHandler(&ws);
+  server.begin();
+}
+
+static uint32_t lastWS = 0;
+static uint32_t deltaWS = 2000;
+
+void loop() {
+  uint32_t now = millis();
+
+  if (now - lastWS >= deltaWS) {
+    ws.cleanupClients();
+    ws.printfAll("now: %" PRIu32 "\n", now);
+    lastWS = millis();
+#ifdef ESP32
+    Serial.printf("Free heap: %" PRIu32 "\n", ESP.getFreeHeap());
+#endif
+  }
+}

Raumtermostat/lib/ESPAsyncWebServer/idf_component.yml

@@ -0,0 +1,37 @@
+description: "Async Web Server for ESP32 Arduino"
+url: "https://github.com/ESP32Async/ESPAsyncWebServer"
+license: "LGPL-3.0-or-later"
+tags:
+  - arduino
+files:
+  exclude:
+    - "idf_component_examples/"
+    - "idf_component_examples/**/*"
+    - "docs/"
+    - "docs/*"
+    - "examples/"
+    - "examples/**/*"
+    - ".gitignore"
+    - ".clang-format"
+    - ".gitpod.Dockerfile"
+    - ".gitpod.yml"
+    - ".codespellrc"
+    - ".editorconfig"
+    - ".pre-commit-config.yaml"
+    - "CODE_OF_CONDUCT.md"
+    - "library.json"
+    - "library.properties"
+    - "partitions-4MB.csv"
+    - "platformio.ini"
+    - "pre-commit.requirements.txt"
+dependencies:
+  esp32async/asynctcp:
+    version: "^3.3.8"
+    require: public
+  bblanchon/arduinojson:
+    version: "^7.4.1"
+    require: public
+examples:
+  - path: ./idf_component_examples/catchall
+  - path: ./idf_component_examples/serversentevents
+  - path: ./idf_component_examples/websocket

Raumtermostat/lib/ESPAsyncWebServer/idf_component_examples/catchall/CMakeLists.txt

@@ -0,0 +1,8 @@
+# For more information about build system see
+# https://docs.espressif.com/projects/esp-idf/en/latest/api-guides/build-system.html
+# The following five lines of boilerplate have to be in your project's
+# CMakeLists in this exact order for cmake to work correctly
+cmake_minimum_required(VERSION 3.16)
+
+include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+project(main)

Raumtermostat/lib/ESPAsyncWebServer/idf_component_examples/catchall/README.md

@@ -0,0 +1 @@
+### Basic example to show how to catch all requests and send a 404 Not Found response

Raumtermostat/lib/ESPAsyncWebServer/idf_component_examples/catchall/main/CMakeLists.txt

@@ -0,0 +1,2 @@
+idf_component_register(SRCS "main.cpp"
+                    INCLUDE_DIRS ".")

Raumtermostat/lib/ESPAsyncWebServer/idf_component_examples/catchall/main/idf_component.yml

@@ -0,0 +1,6 @@
+## IDF Component Manager Manifest File
+dependencies:
+  esp32async/espasyncwebserver:
+    version: "*"
+    override_path: "../../../"
+    pre_release: true

Raumtermostat/lib/ESPAsyncWebServer/idf_component_examples/catchall/main/main.cpp

@@ -0,0 +1,125 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+//
+// Shows how to catch all requests and send a 404 Not Found response
+//
+
+#include <Arduino.h>
+#include <AsyncTCP.h>
+#include <WiFi.h>
+
+#include <ESPAsyncWebServer.h>
+
+static AsyncWebServer server(80);
+
+static const char *htmlContent PROGMEM = R"(
+<!DOCTYPE html>
+<html>
+<head>
+    <title>Sample HTML</title>
+</head>
+<body>
+    <h1>Hello, World!</h1>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+</body>
+</html>
+)";
+
+static const size_t htmlContentLength = strlen_P(htmlContent);
+
+void setup() {
+  Serial.begin(115200);
+
+#ifndef CONFIG_IDF_TARGET_ESP32H2
+  WiFi.mode(WIFI_AP);
+  WiFi.softAP("esp-captive");
+#endif
+
+  // curl -v http://192.168.4.1/
+  server.on("/", HTTP_GET, [](AsyncWebServerRequest *request) {
+    // need to cast to uint8_t*
+    // if you do not, the const char* will be copied in a temporary String buffer
+    request->send(200, "text/html", (uint8_t *)htmlContent, htmlContentLength);
+  });
+
+  // catch any request, and send a 404 Not Found response
+  // except for /game_log which is handled by onRequestBody
+  //
+  // curl -v http://192.168.4.1/foo
+  //
+  server.onNotFound([](AsyncWebServerRequest *request) {
+    if (request->url() == "/game_log") {
+      return;  // response object already created by onRequestBody
+    }
+
+    request->send(404, "text/plain", "Not found");
+  });
+
+  // See: https://github.com/ESP32Async/ESPAsyncWebServer/issues/6
+  // catch any POST request and send a 200 OK response
+  //
+  // curl -v -X POST http://192.168.4.1/game_log -H "Content-Type: application/json" -d '{"game": "test"}'
+  //
+  server.onRequestBody([](AsyncWebServerRequest *request, uint8_t *data, size_t len, size_t index, size_t total) {
+    if (request->url() == "/game_log") {
+      request->send(200, "application/json", "{\"status\":\"OK\"}");
+    }
+    // note that there is no else here: the goal is only to prepare a response based on some body content
+    // onNotFound will always be called after this, and will not override the response object if `/game_log` is requested
+  });
+
+  server.begin();
+}
+
+// not needed
+void loop() {
+  delay(100);
+}

Raumtermostat/lib/ESPAsyncWebServer/idf_component_examples/catchall/sdkconfig.defaults

@@ -0,0 +1,12 @@
+#
+# Arduino ESP32
+#
+CONFIG_AUTOSTART_ARDUINO=y
+# end of Arduino ESP32
+
+#
+# FREERTOS
+#
+CONFIG_FREERTOS_HZ=1000
+# end of FREERTOS
+# end of Component config

Raumtermostat/lib/ESPAsyncWebServer/idf_component_examples/serversentevents/CMakeLists.txt

@@ -0,0 +1,8 @@
+# For more information about build system see
+# https://docs.espressif.com/projects/esp-idf/en/latest/api-guides/build-system.html
+# The following five lines of boilerplate have to be in your project's
+# CMakeLists in this exact order for cmake to work correctly
+cmake_minimum_required(VERSION 3.16)
+
+include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+project(main)

Raumtermostat/lib/ESPAsyncWebServer/idf_component_examples/serversentevents/README.md

@@ -0,0 +1 @@
+### Basic example to show how to use ServerSentEvents

Raumtermostat/lib/ESPAsyncWebServer/idf_component_examples/serversentevents/main/CMakeLists.txt

@@ -0,0 +1,2 @@
+idf_component_register(SRCS "main.cpp"
+                    INCLUDE_DIRS ".")

Raumtermostat/lib/ESPAsyncWebServer/idf_component_examples/serversentevents/main/idf_component.yml

@@ -0,0 +1,6 @@
+## IDF Component Manager Manifest File
+dependencies:
+  esp32async/espasyncwebserver:
+    version: "*"
+    override_path: "../../../"
+    pre_release: true

Raumtermostat/lib/ESPAsyncWebServer/idf_component_examples/serversentevents/main/main.cpp

@@ -0,0 +1,95 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+//
+// SSE example
+//
+
+#include <Arduino.h>
+#include <AsyncTCP.h>
+#include <WiFi.h>
+
+#include <ESPAsyncWebServer.h>
+
+static const char *htmlContent PROGMEM = R"(
+<!DOCTYPE html>
+<html>
+<head>
+  <title>Server-Sent Events</title>
+  <script>
+    if (!!window.EventSource) {
+      var source = new EventSource('/events');
+      source.addEventListener('open', function(e) {
+        console.log("Events Connected");
+      }, false);
+      source.addEventListener('error', function(e) {
+        if (e.target.readyState != EventSource.OPEN) {
+          console.log("Events Disconnected");
+        }
+      }, false);
+      source.addEventListener('message', function(e) {
+        console.log("message", e.data);
+      }, false);
+      source.addEventListener('heartbeat', function(e) {
+        console.log("heartbeat", e.data);
+      }, false);
+    }
+  </script>
+</head>
+<body>
+  <h1>Open your browser console!</h1>
+</body>
+</html>
+)";
+
+static const size_t htmlContentLength = strlen_P(htmlContent);
+
+static AsyncWebServer server(80);
+static AsyncEventSource events("/events");
+
+void setup() {
+  Serial.begin(115200);
+
+#ifndef CONFIG_IDF_TARGET_ESP32H2
+  WiFi.mode(WIFI_AP);
+  WiFi.softAP("esp-captive");
+#endif
+
+  // curl -v http://192.168.4.1/
+  server.on("/", HTTP_GET, [](AsyncWebServerRequest *request) {
+    // need to cast to uint8_t*
+    // if you do not, the const char* will be copied in a temporary String buffer
+    request->send(200, "text/html", (uint8_t *)htmlContent, htmlContentLength);
+  });
+
+  events.onConnect([](AsyncEventSourceClient *client) {
+    Serial.printf("SSE Client connected! ID: %" PRIu32 "\n", client->lastId());
+    client->send("hello!", NULL, millis(), 1000);
+  });
+
+  events.onDisconnect([](AsyncEventSourceClient *client) {
+    Serial.printf("SSE Client disconnected! ID: %" PRIu32 "\n", client->lastId());
+  });
+
+  server.addHandler(&events);
+
+  server.begin();
+}
+
+static uint32_t lastSSE = 0;
+static uint32_t deltaSSE = 3000;
+
+static uint32_t lastHeap = 0;
+
+void loop() {
+  uint32_t now = millis();
+  if (now - lastSSE >= deltaSSE) {
+    events.send(String("ping-") + now, "heartbeat", now);
+    lastSSE = millis();
+  }
+
+  if (now - lastHeap >= 2000) {
+    Serial.printf("Free heap: %" PRIu32 "\n", ESP.getFreeHeap());
+    lastHeap = now;
+  }
+}

Raumtermostat/lib/ESPAsyncWebServer/idf_component_examples/serversentevents/sdkconfig.defaults

@@ -0,0 +1,12 @@
+#
+# Arduino ESP32
+#
+CONFIG_AUTOSTART_ARDUINO=y
+# end of Arduino ESP32
+
+#
+# FREERTOS
+#
+CONFIG_FREERTOS_HZ=1000
+# end of FREERTOS
+# end of Component config

Raumtermostat/lib/ESPAsyncWebServer/idf_component_examples/websocket/CMakeLists.txt

@@ -0,0 +1,8 @@
+# For more information about build system see
+# https://docs.espressif.com/projects/esp-idf/en/latest/api-guides/build-system.html
+# The following five lines of boilerplate have to be in your project's
+# CMakeLists in this exact order for cmake to work correctly
+cmake_minimum_required(VERSION 3.16)
+
+include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+project(main)

Raumtermostat/lib/ESPAsyncWebServer/idf_component_examples/websocket/README.md

@@ -0,0 +1 @@
+### Basic example to show how to use WebSockets

Raumtermostat/lib/ESPAsyncWebServer/idf_component_examples/websocket/main/CMakeLists.txt

@@ -0,0 +1,2 @@
+idf_component_register(SRCS "main.cpp"
+                    INCLUDE_DIRS ".")

Raumtermostat/lib/ESPAsyncWebServer/idf_component_examples/websocket/main/idf_component.yml

@@ -0,0 +1,6 @@
+## IDF Component Manager Manifest File
+dependencies:
+  esp32async/espasyncwebserver:
+    version: "*"
+    override_path: "../../../"
+    pre_release: true

Raumtermostat/lib/ESPAsyncWebServer/idf_component_examples/websocket/main/main.cpp

@@ -0,0 +1,102 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+//
+// WebSocket example
+//
+
+#include <Arduino.h>
+#include <AsyncTCP.h>
+#include <WiFi.h>
+
+#include <ESPAsyncWebServer.h>
+
+static AsyncWebServer server(80);
+static AsyncWebSocket ws("/ws");
+
+void setup() {
+  Serial.begin(115200);
+
+#ifndef CONFIG_IDF_TARGET_ESP32H2
+  WiFi.mode(WIFI_AP);
+  WiFi.softAP("esp-captive");
+#endif
+
+  //
+  // Run in terminal 1: websocat ws://192.168.4.1/ws => should stream data
+  // Run in terminal 2: websocat ws://192.168.4.1/ws => should stream data
+  // Run in terminal 3: websocat ws://192.168.4.1/ws => should fail:
+  //
+  // To send a message to the WebSocket server:
+  //
+  // echo "Hello!" | websocat ws://192.168.4.1/ws
+  //
+  ws.onEvent([](AsyncWebSocket *server, AsyncWebSocketClient *client, AwsEventType type, void *arg, uint8_t *data, size_t len) {
+    (void)len;
+
+    if (type == WS_EVT_CONNECT) {
+      ws.textAll("new client connected");
+      Serial.println("ws connect");
+      client->setCloseClientOnQueueFull(false);
+      client->ping();
+
+    } else if (type == WS_EVT_DISCONNECT) {
+      ws.textAll("client disconnected");
+      Serial.println("ws disconnect");
+
+    } else if (type == WS_EVT_ERROR) {
+      Serial.println("ws error");
+
+    } else if (type == WS_EVT_PONG) {
+      Serial.println("ws pong");
+
+    } else if (type == WS_EVT_DATA) {
+      AwsFrameInfo *info = (AwsFrameInfo *)arg;
+      String msg = "";
+      if (info->final && info->index == 0 && info->len == len) {
+        if (info->opcode == WS_TEXT) {
+          data[len] = 0;
+          Serial.printf("ws text: %s\n", (char *)data);
+        }
+      }
+    }
+  });
+
+  // shows how to prevent a third WS client to connect
+  server.addHandler(&ws).addMiddleware([](AsyncWebServerRequest *request, ArMiddlewareNext next) {
+    // ws.count() is the current count of WS clients: this one is trying to upgrade its HTTP connection
+    if (ws.count() > 1) {
+      // if we have 2 clients or more, prevent the next one to connect
+      request->send(503, "text/plain", "Server is busy");
+    } else {
+      // process next middleware and at the end the handler
+      next();
+    }
+  });
+
+  server.addHandler(&ws);
+
+  server.begin();
+}
+
+static uint32_t lastWS = 0;
+static uint32_t deltaWS = 100;
+
+static uint32_t lastHeap = 0;
+
+void loop() {
+  uint32_t now = millis();
+
+  if (now - lastWS >= deltaWS) {
+    ws.printfAll("kp%.4f", (10.0 / 3.0));
+    lastWS = millis();
+  }
+
+  if (now - lastHeap >= 2000) {
+    // cleanup disconnected clients or too many clients
+    ws.cleanupClients();
+
+    Serial.printf("Free heap: %" PRIu32 "\n", ESP.getFreeHeap());
+    lastHeap = now;
+  }
+}

Raumtermostat/lib/ESPAsyncWebServer/idf_component_examples/websocket/sdkconfig.defaults

@@ -0,0 +1,12 @@
+#
+# Arduino ESP32
+#
+CONFIG_AUTOSTART_ARDUINO=y
+# end of Arduino ESP32
+
+#
+# FREERTOS
+#
+CONFIG_FREERTOS_HZ=1000
+# end of FREERTOS
+# end of Component config

Raumtermostat/lib/ESPAsyncWebServer/library.json

@@ -0,0 +1,33 @@
+{
+  "name": "ESPAsyncWebServer",
+  "version": "3.7.6",
+  "description": "Asynchronous HTTP and WebSocket Server Library for ESP32, ESP8266 and RP2040. Supports: WebSocket, SSE, Authentication, Arduino Json 7, File Upload, Static File serving, URL Rewrite, URL Redirect, etc.",
+  "keywords": "http,async,websocket,webserver",
+  "homepage": "https://github.com/ESP32Async/ESPAsyncWebServer",
+  "repository": {
+    "type": "git",
+    "url": "https://github.com/ESP32Async/ESPAsyncWebServer.git"
+  },
+  "authors":
+  {
+    "name": "ESP32Async",
+    "maintainer": true
+  },
+  "license": "LGPL-3.0",
+  "frameworks": "arduino",
+  "platforms": [
+    "espressif32",
+    "espressif8266",
+    "raspberrypi"
+  ],
+  "export": {
+    "include": [
+      "examples",
+      "src",
+      "library.json",
+      "library.properties",
+      "LICENSE",
+      "README.md"
+    ]
+  }
+}

Raumtermostat/lib/ESPAsyncWebServer/library.properties

@@ -0,0 +1,11 @@
+name=ESP Async WebServer
+includes=ESPAsyncWebServer.h
+version=3.7.6
+author=ESP32Async
+maintainer=ESP32Async
+sentence=Asynchronous HTTP and WebSocket Server Library for ESP32, ESP8266 and RP2040
+paragraph=Supports: WebSocket, SSE, Authentication, Arduino Json 7, File Upload, Static File serving, URL Rewrite, URL Redirect, etc
+category=Other
+url=https://github.com/ESP32Async/ESPAsyncWebServer
+architectures=*
+license=LGPL-3.0

Raumtermostat/lib/ESPAsyncWebServer/partitions-4MB.csv

@@ -0,0 +1,7 @@
+# Name   ,Type ,SubType  ,Offset ,Size  ,Flags
+nvs      ,data ,nvs      ,36K    ,20K   ,
+otadata  ,data ,ota      ,56K    ,8K    ,
+app0     ,app  ,ota_0    ,64K    ,1856K  ,
+app1     ,app  ,ota_1    ,1920K  ,1856K ,
+spiffs   ,data ,spiffs   ,3776K  ,256K   ,
+coredump ,data ,coredump ,4032K  ,64K   ,

Raumtermostat/lib/ESPAsyncWebServer/pioarduino_examples/IncreaseMaxSockets/.gitignore

@@ -0,0 +1,11 @@
+.DS_Store
+.lh
+/.pio
+/.vscode
+/logs
+
+/sdkconfig.*
+/CMakeLists.txt
+/dependencies.lock
+/.dummy
+/managed_components

Raumtermostat/lib/ESPAsyncWebServer/pioarduino_examples/IncreaseMaxSockets/platformio.ini

@@ -0,0 +1,26 @@
+[env]
+framework = arduino
+platform = https://github.com/pioarduino/platform-espressif32/releases/download/54.03.20/platform-espressif32.zip
+build_flags =
+  -Og
+  -Wall -Wextra
+  -Wno-unused-parameter
+  -D CORE_DEBUG_LEVEL=ARDUHAL_LOG_LEVEL_VERBOSE
+  ; -D CONFIG_ASYNC_TCP_MAX_ACK_TIME=5000
+  ; -D CONFIG_ASYNC_TCP_PRIORITY=10
+  -D CONFIG_ASYNC_TCP_QUEUE_SIZE=128
+  -D CONFIG_ASYNC_TCP_RUNNING_CORE=1
+  -D CONFIG_ASYNC_TCP_STACK_SIZE=4096
+upload_protocol = esptool
+monitor_speed = 115200
+monitor_filters = esp32_exception_decoder, log2file
+lib_compat_mode = strict
+lib_ldf_mode = chain
+lib_deps =
+  ESP32Async/AsyncTCP @ 3.3.8
+  ESP32Async/ESpAsyncWebServer @ 3.7.0
+
+custom_sdkconfig = CONFIG_LWIP_MAX_ACTIVE_TCP=32
+
+[env:esp32dev]
+board = esp32dev

Raumtermostat/lib/ESPAsyncWebServer/pioarduino_examples/IncreaseMaxSockets/src/main.cpp

@@ -0,0 +1,142 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+//
+// This example demonstrates how to increase the maximum number of active TCP connections
+//
+// in platformo.ini:
+//
+// Use hybrid compilation to set the maximum number of active TCP connections
+//
+// custom_sdkconfig = CONFIG_LWIP_MAX_ACTIVE_TCP=32
+//
+// and increase the queue stack size
+//
+// -D CONFIG_ASYNC_TCP_QUEUE_SIZE=128
+//
+
+#include <Arduino.h>
+#include <AsyncTCP.h>
+#include <WiFi.h>
+#include <ESPAsyncWebServer.h>
+
+static const char *htmlContent PROGMEM = R"(
+<!DOCTYPE html>
+<html>
+<head>
+    <title>Sample HTML</title>
+</head>
+<body>
+    <h1>Hello, World!</h1>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+    <p>Lorem ipsum dolor sit amet, consectetur adipiscing elit. Proin euismod, purus a euismod
+    rhoncus, urna ipsum cursus massa, eu dictum tellus justo ac justo. Quisque ullamcorper
+    arcu nec tortor ullamcorper, vel fermentum justo fermentum. Vivamus sed velit ut elit
+    accumsan congue ut ut enim. Ut eu justo eu lacus varius gravida ut a tellus. Nulla facilisi.
+    Integer auctor consectetur ultricies. Fusce feugiat, mi sit amet bibendum viverra, orci leo
+    dapibus elit, id varius sem dui id lacus.</p>
+</body>
+</html>
+)";
+
+static const size_t htmlContentLength = strlen_P(htmlContent);
+
+static AsyncWebServer server(80);
+static AsyncEventSource events("/events");
+
+static volatile size_t requests = 0;
+
+void setup() {
+  Serial.begin(115200);
+
+  Serial.println("============================");
+  Serial.printf("CONFIG_LWIP_MAX_ACTIVE_TCP %d\n", CONFIG_LWIP_MAX_ACTIVE_TCP);
+  Serial.println("============================");
+
+  WiFi.mode(WIFI_STA);
+  WiFi.begin("IoT", "");
+
+  while (WiFi.status() != WL_CONNECTED) {
+    delay(500);
+    Serial.println("Connecting to WiFi...");
+  }
+
+  // HTTP endpoint
+  //
+  // > autocannon -c 32 -d 20 -t 30 --renderStatusCodes http://192.168.125.146/
+  //
+  server.on("/", HTTP_GET, [](AsyncWebServerRequest *request) {
+    requests++;
+    request->send(200, "text/html", (uint8_t *)htmlContent, htmlContentLength);
+  });
+
+  // SSS endpoint
+  //
+  // launch 32 concurrent workers for 30 seconds
+  // > for i in {1..32}; do ( count=$(gtimeout 30 curl -s -N -H "Accept: text/event-stream" http://192.168.125.146/events 2>&1 | grep -c "^data:"); echo "Total: $count events, $(echo "$count / 4" | bc -l) events / second" ) & done;
+  //
+  server.addHandler(&events);
+
+  server.begin();
+}
+
+static uint32_t lastSSE = 0;
+static uint32_t deltaSSE = 10;
+
+static uint32_t lastHeap = 0;
+
+void loop() {
+  uint32_t now = millis();
+  if (now - lastSSE >= deltaSSE) {
+    events.send(String("ping-") + now, "heartbeat", now);
+    lastSSE = millis();
+  }
+
+#ifdef ESP32
+  if (now - lastHeap >= 2000) {
+    Serial.printf("Uptime: %3lu s, requests: %3u, Free heap: %" PRIu32 "\n", millis() / 1000, requests, ESP.getFreeHeap());
+    lastHeap = now;
+  }
+#endif
+}

Raumtermostat/lib/ESPAsyncWebServer/platformio.ini

@@ -0,0 +1,155 @@
+[platformio]
+default_envs = arduino-2, arduino-3, esp8266, raspberrypi
+lib_dir = .
+; src_dir = examples/AsyncResponseStream
+; src_dir = examples/Auth
+; src_dir = examples/CaptivePortal
+; src_dir = examples/CatchAllHandler
+; src_dir = examples/ChunkResponse
+; src_dir = examples/ChunkRetryResponse
+; src_dir = examples/CORS
+; src_dir = examples/EndBegin
+; src_dir = examples/Filters
+; src_dir = examples/FlashResponse
+; src_dir = examples/HeaderManipulation
+; src_dir = examples/Json
+; src_dir = examples/Logging
+; src_dir = examples/MessagePack
+; src_dir = examples/Middleware
+; src_dir = examples/Params
+; src_dir = examples/PartitionDownloader
+src_dir = examples/PerfTests
+; src_dir = examples/RateLimit
+; src_dir = examples/Redirect
+; src_dir = examples/RequestContinuation
+; src_dir = examples/RequestContinuationComplete
+; src_dir = examples/ResumableDownload
+; src_dir = examples/Rewrite
+; src_dir = examples/ServerSentEvents
+; src_dir = examples/ServerState
+; src_dir = examples/SkipServerMiddleware
+; src_dir = examples/SlowChunkResponse
+; src_dir = examples/StaticFile
+; src_dir = examples/Templates
+; src_dir = examples/Upload
+; src_dir = examples/WebSocket
+; src_dir = examples/WebSocketEasy
+
+[env]
+framework = arduino
+platform = https://github.com/pioarduino/platform-espressif32/releases/download/54.03.20/platform-espressif32.zip
+board = esp32dev
+build_flags =
+  -Og
+  -Wall -Wextra
+  -Wno-unused-parameter
+  ; -D CONFIG_ARDUHAL_LOG_COLORS
+  -D CORE_DEBUG_LEVEL=ARDUHAL_LOG_LEVEL_VERBOSE
+  -D CONFIG_ASYNC_TCP_MAX_ACK_TIME=5000
+  -D CONFIG_ASYNC_TCP_PRIORITY=10
+  -D CONFIG_ASYNC_TCP_QUEUE_SIZE=64
+  -D CONFIG_ASYNC_TCP_RUNNING_CORE=1
+  -D CONFIG_ASYNC_TCP_STACK_SIZE=4096
+  ; -D CONFIG_ASYNC_TCP_USE_WDT=0
+upload_protocol = esptool
+monitor_speed = 115200
+monitor_filters = esp32_exception_decoder, log2file
+; monitor_filters = esp8266_exception_decoder, log2file
+lib_compat_mode = strict
+lib_ldf_mode = chain
+lib_deps =
+  bblanchon/ArduinoJson @ 7.4.1
+  ESP32Async/AsyncTCP @ 3.3.8
+board_build.partitions = partitions-4MB.csv
+board_build.filesystem = littlefs
+
+[env:arduino-2]
+platform = espressif32@6.10.0
+
+[env:arduino-3]
+
+[env:arduino-3-latest]
+platform = https://github.com/pioarduino/platform-espressif32/releases/download/54.03.20-rc2/platform-espressif32.zip
+
+[env:arduino-3-no-json]
+lib_deps =
+  ESP32Async/AsyncTCP @ 3.3.8
+
+[env:arduino-3-latest-asynctcp]
+lib_deps =
+  https://github.com/ESP32Async/AsyncTCP
+
+[env:arduino-3-no-chunk-inflight]
+build_flags = ${env.build_flags}
+  -D ASYNCWEBSERVER_USE_CHUNK_INFLIGHT=0
+
+[env:AsyncTCPSock]
+lib_deps =
+  https://github.com/ESP32Async/AsyncTCPSock/archive/refs/tags/v1.0.3-dev.zip
+build_flags = ${env.build_flags}
+
+[env:esp8266]
+platform = espressif8266
+; board = huzzah
+board = d1_mini
+lib_deps =
+  bblanchon/ArduinoJson @ 7.4.1
+  ESP32Async/ESPAsyncTCP @ 2.0.0
+
+[env:raspberrypi]
+platform = https://github.com/maxgerhardt/platform-raspberrypi.git#c7502925e3b08af70e9f924d54ab9d00a7e64781
+board = rpipicow
+board_build.core = earlephilhower
+lib_deps =
+  bblanchon/ArduinoJson @ 7.3.0
+  ayushsharma82/RPAsyncTCP@^1.3.2
+lib_ignore =
+  lwIP_ESPHost
+build_flags = ${env.build_flags}
+  -Wno-missing-field-initializers
+
+;  CI
+
+[env:ci-arduino-2]
+platform = espressif32@6.10.0
+board = ${sysenv.PIO_BOARD}
+
+[env:ci-arduino-3]
+board = ${sysenv.PIO_BOARD}
+
+[env:ci-arduino-3-latest]
+platform = https://github.com/pioarduino/platform-espressif32/releases/download/54.03.20-rc2/platform-espressif32.zip
+board = ${sysenv.PIO_BOARD}
+
+[env:ci-arduino-3-no-json]
+board = ${sysenv.PIO_BOARD}
+lib_deps =
+  ESP32Async/AsyncTCP @ 3.3.8
+
+[env:ci-arduino-3-latest-asynctcp]
+lib_deps =
+  https://github.com/ESP32Async/AsyncTCP
+
+[env:ci-arduino-3-no-chunk-inflight]
+board = ${sysenv.PIO_BOARD}
+build_flags = ${env.build_flags}
+  -D ASYNCWEBSERVER_USE_CHUNK_INFLIGHT=1
+
+[env:ci-esp8266]
+platform = espressif8266
+board = ${sysenv.PIO_BOARD}
+lib_deps =
+  bblanchon/ArduinoJson @ 7.4.1
+  ESP32Async/ESPAsyncTCP @ 2.0.0
+
+[env:ci-raspberrypi]
+platform = https://github.com/maxgerhardt/platform-raspberrypi.git#c7502925e3b08af70e9f924d54ab9d00a7e64781
+board = ${sysenv.PIO_BOARD}
+board_build.core = earlephilhower
+lib_deps =
+  bblanchon/ArduinoJson @ 7.3.0
+  ayushsharma82/RPAsyncTCP@^1.3.2
+lib_ignore =
+  lwIP_ESPHost
+build_flags = ${env.build_flags}
+  -Wno-missing-field-initializers

Raumtermostat/lib/ESPAsyncWebServer/pre-commit.requirements.txt

@@ -0,0 +1 @@
+pre-commit==4.1.0

Raumtermostat/lib/ESPAsyncWebServer/src/AsyncEventSource.cpp

@@ -0,0 +1,507 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+#include "Arduino.h"
+#if defined(ESP32)
+#include <rom/ets_sys.h>
+#endif
+#include "AsyncEventSource.h"
+
+#define ASYNC_SSE_NEW_LINE_CHAR (char)0xa
+
+using namespace asyncsrv;
+
+static String generateEventMessage(const char *message, const char *event, uint32_t id, uint32_t reconnect) {
+  String str;
+  size_t len{0};
+  if (message) {
+    len += strlen(message);
+  }
+
+  if (event) {
+    len += strlen(event);
+  }
+
+  len += 42;  // give it some overhead
+
+  if (!str.reserve(len)) {
+#ifdef ESP32
+    log_e("Failed to allocate");
+#endif
+    return emptyString;
+  }
+
+  if (reconnect) {
+    str += T_retry_;
+    str += reconnect;
+    str += ASYNC_SSE_NEW_LINE_CHAR;  // '\n'
+  }
+
+  if (id) {
+    str += T_id__;
+    str += id;
+    str += ASYNC_SSE_NEW_LINE_CHAR;  // '\n'
+  }
+
+  if (event != NULL) {
+    str += T_event_;
+    str += event;
+    str += ASYNC_SSE_NEW_LINE_CHAR;  // '\n'
+  }
+
+  if (!message) {
+    return str;
+  }
+
+  size_t messageLen = strlen(message);
+  char *lineStart = (char *)message;
+  char *lineEnd;
+  do {
+    char *nextN = strchr(lineStart, '\n');
+    char *nextR = strchr(lineStart, '\r');
+    if (nextN == NULL && nextR == NULL) {
+      // a message is a single-line string
+      str += T_data_;
+      str += message;
+      str += T_nn;
+      return str;
+    }
+
+    // a message is a multi-line string
+    char *nextLine = NULL;
+    if (nextN != NULL && nextR != NULL) {  // windows line-ending \r\n
+      if (nextR + 1 == nextN) {
+        // normal \r\n sequence
+        lineEnd = nextR;
+        nextLine = nextN + 1;
+      } else {
+        // some abnormal \n \r mixed sequence
+        lineEnd = std::min(nextR, nextN);
+        nextLine = lineEnd + 1;
+      }
+    } else if (nextN != NULL) {  // Unix/Mac OS X LF
+      lineEnd = nextN;
+      nextLine = nextN + 1;
+    } else {  // some ancient garbage
+      lineEnd = nextR;
+      nextLine = nextR + 1;
+    }
+
+    str += T_data_;
+    str.concat(lineStart, lineEnd - lineStart);
+    str += ASYNC_SSE_NEW_LINE_CHAR;  // \n
+
+    lineStart = nextLine;
+  } while (lineStart < ((char *)message + messageLen));
+
+  // append another \n to terminate message
+  str += ASYNC_SSE_NEW_LINE_CHAR;  // '\n'
+
+  return str;
+}
+
+// Message
+
+size_t AsyncEventSourceMessage::ack(size_t len, __attribute__((unused)) uint32_t time) {
+  // If the whole message is now acked...
+  if (_acked + len > _data->length()) {
+    // Return the number of extra bytes acked (they will be carried on to the next message)
+    const size_t extra = _acked + len - _data->length();
+    _acked = _data->length();
+    return extra;
+  }
+  // Return that no extra bytes left.
+  _acked += len;
+  return 0;
+}
+
+size_t AsyncEventSourceMessage::write(AsyncClient *client) {
+  if (!client) {
+    return 0;
+  }
+
+  if (_sent >= _data->length() || !client->canSend()) {
+    return 0;
+  }
+
+  size_t len = std::min(_data->length() - _sent, client->space());
+  /*
+    add() would call lwip's tcp_write() under the AsyncTCP hood with apiflags argument.
+    By default apiflags=ASYNC_WRITE_FLAG_COPY
+    we could have used apiflags with this flag unset to pass data by reference and avoid copy to socket buffer,
+    but looks like it does not work for Arduino's lwip in ESP32/IDF
+    it is enforced in https://github.com/espressif/esp-lwip/blob/0606eed9d8b98a797514fdf6eabb4daf1c8c8cd9/src/core/tcp_out.c#L422C5-L422C30
+    if LWIP_NETIF_TX_SINGLE_PBUF is set, and it is set indeed in IDF
+    https://github.com/espressif/esp-idf/blob/a0f798cfc4bbd624aab52b2c194d219e242d80c1/components/lwip/port/include/lwipopts.h#L744
+
+    So let's just keep it enforced ASYNC_WRITE_FLAG_COPY and keep in mind that there is no zero-copy
+  */
+  size_t written = client->add(_data->c_str() + _sent, len, ASYNC_WRITE_FLAG_COPY);  //  ASYNC_WRITE_FLAG_MORE
+  _sent += written;
+  return written;
+}
+
+size_t AsyncEventSourceMessage::send(AsyncClient *client) {
+  size_t sent = write(client);
+  return sent && client->send() ? sent : 0;
+}
+
+// Client
+
+AsyncEventSourceClient::AsyncEventSourceClient(AsyncWebServerRequest *request, AsyncEventSource *server) : _client(request->client()), _server(server) {
+
+  if (request->hasHeader(T_Last_Event_ID)) {
+    _lastId = atoi(request->getHeader(T_Last_Event_ID)->value().c_str());
+  }
+
+  _client->setRxTimeout(0);
+  _client->onError(NULL, NULL);
+  _client->onAck(
+    [](void *r, AsyncClient *c, size_t len, uint32_t time) {
+      (void)c;
+      static_cast<AsyncEventSourceClient *>(r)->_onAck(len, time);
+    },
+    this
+  );
+  _client->onPoll(
+    [](void *r, AsyncClient *c) {
+      (void)c;
+      static_cast<AsyncEventSourceClient *>(r)->_onPoll();
+    },
+    this
+  );
+  _client->onData(NULL, NULL);
+  _client->onTimeout(
+    [this](void *r, AsyncClient *c __attribute__((unused)), uint32_t time) {
+      static_cast<AsyncEventSourceClient *>(r)->_onTimeout(time);
+    },
+    this
+  );
+  _client->onDisconnect(
+    [this](void *r, AsyncClient *c) {
+      static_cast<AsyncEventSourceClient *>(r)->_onDisconnect();
+      delete c;
+    },
+    this
+  );
+
+  _server->_addClient(this);
+  delete request;
+
+  _client->setNoDelay(true);
+}
+
+AsyncEventSourceClient::~AsyncEventSourceClient() {
+#ifdef ESP32
+  std::lock_guard<std::recursive_mutex> lock(_lockmq);
+#endif
+  _messageQueue.clear();
+  close();
+}
+
+bool AsyncEventSourceClient::_queueMessage(const char *message, size_t len) {
+  if (_messageQueue.size() >= SSE_MAX_QUEUED_MESSAGES) {
+#ifdef ESP8266
+    ets_printf(String(F("ERROR: Too many messages queued\n")).c_str());
+#elif defined(ESP32)
+    log_e("Event message queue overflow: discard message");
+#endif
+    return false;
+  }
+
+#ifdef ESP32
+  // length() is not thread-safe, thus acquiring the lock before this call..
+  std::lock_guard<std::recursive_mutex> lock(_lockmq);
+#endif
+
+  _messageQueue.emplace_back(message, len);
+
+  /*
+    throttle queue run
+    if Q is filled for >25% then network/CPU is congested, since there is no zero-copy mode for socket buff
+    forcing Q run will only eat more heap ram and blow the buffer, let's just keep data in our own queue
+    the queue will be processed at least on each onAck()/onPoll() call from AsyncTCP
+  */
+  if (_messageQueue.size() < SSE_MAX_QUEUED_MESSAGES >> 2 && _client->canSend()) {
+    _runQueue();
+  }
+
+  return true;
+}
+
+bool AsyncEventSourceClient::_queueMessage(AsyncEvent_SharedData_t &&msg) {
+  if (_messageQueue.size() >= SSE_MAX_QUEUED_MESSAGES) {
+#ifdef ESP8266
+    ets_printf(String(F("ERROR: Too many messages queued\n")).c_str());
+#elif defined(ESP32)
+    log_e("Event message queue overflow: discard message");
+#endif
+    return false;
+  }
+
+#ifdef ESP32
+  // length() is not thread-safe, thus acquiring the lock before this call..
+  std::lock_guard<std::recursive_mutex> lock(_lockmq);
+#endif
+
+  _messageQueue.emplace_back(std::move(msg));
+
+  /*
+    throttle queue run
+    if Q is filled for >25% then network/CPU is congested, since there is no zero-copy mode for socket buff
+    forcing Q run will only eat more heap ram and blow the buffer, let's just keep data in our own queue
+    the queue will be processed at least on each onAck()/onPoll() call from AsyncTCP
+  */
+  if (_messageQueue.size() < SSE_MAX_QUEUED_MESSAGES >> 2 && _client->canSend()) {
+    _runQueue();
+  }
+  return true;
+}
+
+void AsyncEventSourceClient::_onAck(size_t len __attribute__((unused)), uint32_t time __attribute__((unused))) {
+#ifdef ESP32
+  // Same here, acquiring the lock early
+  std::lock_guard<std::recursive_mutex> lock(_lockmq);
+#endif
+
+  // adjust in-flight len
+  if (len < _inflight) {
+    _inflight -= len;
+  } else {
+    _inflight = 0;
+  }
+
+  // acknowledge as much messages's data as we got confirmed len from a AsyncTCP
+  while (len && _messageQueue.size()) {
+    len = _messageQueue.front().ack(len);
+    if (_messageQueue.front().finished()) {
+      // now we could release full ack'ed messages, we were keeping it unless send confirmed from AsyncTCP
+      _messageQueue.pop_front();
+    }
+  }
+
+  // try to send another batch of data
+  if (_messageQueue.size()) {
+    _runQueue();
+  }
+}
+
+void AsyncEventSourceClient::_onPoll() {
+  if (_messageQueue.size()) {
+#ifdef ESP32
+    // Same here, acquiring the lock early
+    std::lock_guard<std::recursive_mutex> lock(_lockmq);
+#endif
+    _runQueue();
+  }
+}
+
+void AsyncEventSourceClient::_onTimeout(uint32_t time __attribute__((unused))) {
+  if (_client) {
+    _client->close(true);
+  }
+}
+
+void AsyncEventSourceClient::_onDisconnect() {
+  if (!_client) {
+    return;
+  }
+  _client = nullptr;
+  _server->_handleDisconnect(this);
+}
+
+void AsyncEventSourceClient::close() {
+  if (_client) {
+    _client->close();
+  }
+}
+
+bool AsyncEventSourceClient::send(const char *message, const char *event, uint32_t id, uint32_t reconnect) {
+  if (!connected()) {
+    return false;
+  }
+  return _queueMessage(std::make_shared<String>(generateEventMessage(message, event, id, reconnect)));
+}
+
+void AsyncEventSourceClient::_runQueue() {
+  if (!_client) {
+    return;
+  }
+
+  // there is no need to lock the mutex here, 'cause all the calls to this method must be already lock'ed
+  size_t total_bytes_written = 0;
+  for (auto i = _messageQueue.begin(); i != _messageQueue.end(); ++i) {
+    if (!i->sent()) {
+      const size_t bytes_written = i->write(_client);
+      total_bytes_written += bytes_written;
+      _inflight += bytes_written;
+      if (bytes_written == 0 || _inflight > _max_inflight) {
+        // Serial.print("_");
+        break;
+      }
+    }
+  }
+
+  // flush socket
+  if (total_bytes_written) {
+    _client->send();
+  }
+}
+
+void AsyncEventSourceClient::set_max_inflight_bytes(size_t value) {
+  if (value >= SSE_MIN_INFLIGH && value <= SSE_MAX_INFLIGH) {
+    _max_inflight = value;
+  }
+}
+
+/*  AsyncEventSource  */
+
+void AsyncEventSource::authorizeConnect(ArAuthorizeConnectHandler cb) {
+  AsyncAuthorizationMiddleware *m = new AsyncAuthorizationMiddleware(401, cb);
+  m->_freeOnRemoval = true;
+  addMiddleware(m);
+}
+
+void AsyncEventSource::_addClient(AsyncEventSourceClient *client) {
+  if (!client) {
+    return;
+  }
+#ifdef ESP32
+  std::lock_guard<std::recursive_mutex> lock(_client_queue_lock);
+#endif
+  _clients.emplace_back(client);
+  if (_connectcb) {
+    _connectcb(client);
+  }
+
+  _adjust_inflight_window();
+}
+
+void AsyncEventSource::_handleDisconnect(AsyncEventSourceClient *client) {
+  if (_disconnectcb) {
+    _disconnectcb(client);
+  }
+#ifdef ESP32
+  std::lock_guard<std::recursive_mutex> lock(_client_queue_lock);
+#endif
+  for (auto i = _clients.begin(); i != _clients.end(); ++i) {
+    if (i->get() == client) {
+      _clients.erase(i);
+      break;
+    }
+  }
+  _adjust_inflight_window();
+}
+
+void AsyncEventSource::close() {
+  // While the whole loop is not done, the linked list is locked and so the
+  // iterator should remain valid even when AsyncEventSource::_handleDisconnect()
+  // is called very early
+#ifdef ESP32
+  std::lock_guard<std::recursive_mutex> lock(_client_queue_lock);
+#endif
+  for (const auto &c : _clients) {
+    if (c->connected()) {
+      /**
+       * @brief: Fix self-deadlock by using recursive_mutex instead.
+       * Due to c->close() shall call the callback function _onDisconnect()
+       * The calling flow _onDisconnect() --> _handleDisconnect() --> deadlock
+      */
+      c->close();
+    }
+  }
+}
+
+// pmb fix
+size_t AsyncEventSource::avgPacketsWaiting() const {
+  size_t aql = 0;
+  uint32_t nConnectedClients = 0;
+#ifdef ESP32
+  std::lock_guard<std::recursive_mutex> lock(_client_queue_lock);
+#endif
+  if (!_clients.size()) {
+    return 0;
+  }
+
+  for (const auto &c : _clients) {
+    if (c->connected()) {
+      aql += c->packetsWaiting();
+      ++nConnectedClients;
+    }
+  }
+  return ((aql) + (nConnectedClients / 2)) / (nConnectedClients);  // round up
+}
+
+AsyncEventSource::SendStatus AsyncEventSource::send(const char *message, const char *event, uint32_t id, uint32_t reconnect) {
+  AsyncEvent_SharedData_t shared_msg = std::make_shared<String>(generateEventMessage(message, event, id, reconnect));
+#ifdef ESP32
+  std::lock_guard<std::recursive_mutex> lock(_client_queue_lock);
+#endif
+  size_t hits = 0;
+  size_t miss = 0;
+  for (const auto &c : _clients) {
+    if (c->write(shared_msg)) {
+      ++hits;
+    } else {
+      ++miss;
+    }
+  }
+  return hits == 0 ? DISCARDED : (miss == 0 ? ENQUEUED : PARTIALLY_ENQUEUED);
+}
+
+size_t AsyncEventSource::count() const {
+#ifdef ESP32
+  std::lock_guard<std::recursive_mutex> lock(_client_queue_lock);
+#endif
+  size_t n_clients{0};
+  for (const auto &i : _clients) {
+    if (i->connected()) {
+      ++n_clients;
+    }
+  }
+
+  return n_clients;
+}
+
+bool AsyncEventSource::canHandle(AsyncWebServerRequest *request) const {
+  return request->isSSE() && request->url().equals(_url);
+}
+
+void AsyncEventSource::handleRequest(AsyncWebServerRequest *request) {
+  request->send(new AsyncEventSourceResponse(this));
+}
+
+void AsyncEventSource::_adjust_inflight_window() {
+  if (_clients.size()) {
+    size_t inflight = SSE_MAX_INFLIGH / _clients.size();
+    for (const auto &c : _clients) {
+      c->set_max_inflight_bytes(inflight);
+    }
+    // Serial.printf("adjusted inflight to: %u\n", inflight);
+  }
+}
+
+/*  Response  */
+
+AsyncEventSourceResponse::AsyncEventSourceResponse(AsyncEventSource *server) {
+  _server = server;
+  _code = 200;
+  _contentType = T_text_event_stream;
+  _sendContentLength = false;
+  addHeader(T_Cache_Control, T_no_cache);
+  addHeader(T_Connection, T_keep_alive);
+}
+
+void AsyncEventSourceResponse::_respond(AsyncWebServerRequest *request) {
+  String out;
+  _assembleHead(out, request->version());
+  request->client()->write(out.c_str(), _headLength);
+  _state = RESPONSE_WAIT_ACK;
+}
+
+size_t AsyncEventSourceResponse::_ack(AsyncWebServerRequest *request, size_t len, uint32_t time __attribute__((unused))) {
+  if (len) {
+    new AsyncEventSourceClient(request, _server);
+  }
+  return 0;
+}

Raumtermostat/lib/ESPAsyncWebServer/src/AsyncEventSource.h

@@ -0,0 +1,320 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+#ifndef ASYNCEVENTSOURCE_H_
+#define ASYNCEVENTSOURCE_H_
+
+#include <Arduino.h>
+
+#ifdef ESP32
+#include <AsyncTCP.h>
+#include <mutex>
+#ifndef SSE_MAX_QUEUED_MESSAGES
+#define SSE_MAX_QUEUED_MESSAGES 32
+#endif
+#define SSE_MIN_INFLIGH 2 * 1460   // allow 2 MSS packets
+#define SSE_MAX_INFLIGH 16 * 1024  // but no more than 16k, no need to blow it, since same data is kept in local Q
+#elif defined(ESP8266)
+#include <ESPAsyncTCP.h>
+#ifndef SSE_MAX_QUEUED_MESSAGES
+#define SSE_MAX_QUEUED_MESSAGES 8
+#endif
+#define SSE_MIN_INFLIGH 2 * 1460  // allow 2 MSS packets
+#define SSE_MAX_INFLIGH 8 * 1024  // but no more than 8k, no need to blow it, since same data is kept in local Q
+#elif defined(TARGET_RP2040) || defined(TARGET_RP2350) || defined(PICO_RP2040) || defined(PICO_RP2350)
+#include <RPAsyncTCP.h>
+#ifndef SSE_MAX_QUEUED_MESSAGES
+#define SSE_MAX_QUEUED_MESSAGES 32
+#endif
+#define SSE_MIN_INFLIGH 2 * 1460   // allow 2 MSS packets
+#define SSE_MAX_INFLIGH 16 * 1024  // but no more than 16k, no need to blow it, since same data is kept in local Q
+#endif
+
+#include <ESPAsyncWebServer.h>
+
+#ifdef ESP8266
+#include <Hash.h>
+#ifdef CRYPTO_HASH_h  // include Hash.h from espressif framework if the first include was from the crypto library
+#include <../src/Hash.h>
+#endif
+#endif
+
+class AsyncEventSource;
+class AsyncEventSourceResponse;
+class AsyncEventSourceClient;
+using ArEventHandlerFunction = std::function<void(AsyncEventSourceClient *client)>;
+using ArAuthorizeConnectHandler = ArAuthorizeFunction;
+// shared message object container
+using AsyncEvent_SharedData_t = std::shared_ptr<String>;
+
+/**
+ * @brief Async Event Message container with shared message content data
+ *
+ */
+class AsyncEventSourceMessage {
+
+private:
+  const AsyncEvent_SharedData_t _data;
+  size_t _sent{0};   // num of bytes already sent
+  size_t _acked{0};  // num of bytes acked
+
+public:
+  AsyncEventSourceMessage(AsyncEvent_SharedData_t data) : _data(data){};
+#if defined(ESP32)
+  AsyncEventSourceMessage(const char *data, size_t len) : _data(std::make_shared<String>(data, len)){};
+#elif defined(TARGET_RP2040) || defined(TARGET_RP2350) || defined(PICO_RP2040) || defined(PICO_RP2350)
+  AsyncEventSourceMessage(const char *data, size_t len) : _data(std::make_shared<String>()) {
+    if (data && len > 0) {
+      _data->concat(data, len);
+    }
+  };
+#else
+  // esp8266's String does not have constructor with data/length arguments. Use a concat method here
+  AsyncEventSourceMessage(const char *data, size_t len) {
+    _data->concat(data, len);
+  };
+#endif
+
+  /**
+     * @brief acknowledge sending len bytes of data
+     * @note if num of bytes to ack is larger then the unacknowledged message length the number of carried over bytes are returned
+     *
+     * @param len bytes to acknowledge
+     * @param time
+     * @return size_t number of extra bytes carried over
+     */
+  size_t ack(size_t len, uint32_t time = 0);
+
+  /**
+     * @brief write message data to client's buffer
+     * @note this method does NOT call client's send
+     *
+     * @param client
+     * @return size_t number of bytes written
+     */
+  size_t write(AsyncClient *client);
+
+  /**
+     * @brief writes message data to client's buffer and calls client's send method
+     *
+     * @param client
+     * @return size_t returns num of bytes the clien was able to send()
+     */
+  size_t send(AsyncClient *client);
+
+  // returns true if full message's length were acked
+  bool finished() {
+    return _acked == _data->length();
+  }
+
+  /**
+     * @brief returns true if all data has been sent already
+     *
+     */
+  bool sent() {
+    return _sent == _data->length();
+  }
+};
+
+/**
+ * @brief class holds a sse messages queue for a particular client's connection
+ *
+ */
+class AsyncEventSourceClient {
+private:
+  AsyncClient *_client;
+  AsyncEventSource *_server;
+  uint32_t _lastId{0};
+  size_t _inflight{0};                    // num of unacknowledged bytes that has been written to socket buffer
+  size_t _max_inflight{SSE_MAX_INFLIGH};  // max num of unacknowledged bytes that could be written to socket buffer
+  std::list<AsyncEventSourceMessage> _messageQueue;
+#ifdef ESP32
+  mutable std::recursive_mutex _lockmq;
+#endif
+  bool _queueMessage(const char *message, size_t len);
+  bool _queueMessage(AsyncEvent_SharedData_t &&msg);
+  void _runQueue();
+
+public:
+  AsyncEventSourceClient(AsyncWebServerRequest *request, AsyncEventSource *server);
+  ~AsyncEventSourceClient();
+
+  /**
+     * @brief Send an SSE message to client
+     * it will craft an SSE message and place it to client's message queue
+     *
+     * @param message body string, could be single or multi-line string sepprated by \n, \r, \r\n
+     * @param event body string, a sinle line string
+     * @param id sequence id
+     * @param reconnect client's reconnect timeout
+     * @return true if message was placed in a queue
+     * @return false if queue is full
+     */
+  bool send(const char *message, const char *event = NULL, uint32_t id = 0, uint32_t reconnect = 0);
+  bool send(const String &message, const String &event, uint32_t id = 0, uint32_t reconnect = 0) {
+    return send(message.c_str(), event.c_str(), id, reconnect);
+  }
+  bool send(const String &message, const char *event, uint32_t id = 0, uint32_t reconnect = 0) {
+    return send(message.c_str(), event, id, reconnect);
+  }
+
+  /**
+     * @brief place supplied preformatted SSE message to the message queue
+     * @note message must a properly formatted SSE string according to https://developer.mozilla.org/en-US/docs/Web/API/Server-sent_events/Using_server-sent_events
+     *
+     * @param message data
+     * @return true on success
+     * @return false on queue overflow or no client connected
+     */
+  bool write(AsyncEvent_SharedData_t message) {
+    return connected() && _queueMessage(std::move(message));
+  };
+
+  [[deprecated("Use _write(AsyncEvent_SharedData_t message) instead to share same data with multiple SSE clients")]]
+  bool write(const char *message, size_t len) {
+    return connected() && _queueMessage(message, len);
+  };
+
+  // close client's connection
+  void close();
+
+  // getters
+
+  AsyncClient *client() {
+    return _client;
+  }
+  bool connected() const {
+    return _client && _client->connected();
+  }
+  uint32_t lastId() const {
+    return _lastId;
+  }
+  size_t packetsWaiting() const {
+    return _messageQueue.size();
+  };
+
+  /**
+     * @brief Sets max amount of bytes that could be written to client's socket while awaiting delivery acknowledge
+     * used to throttle message delivery length to tradeoff memory consumption
+     * @note actual amount of data written could possible be a bit larger but no more than available socket buff space
+     *
+     * @param value
+     */
+  void set_max_inflight_bytes(size_t value);
+
+  /**
+     * @brief Get current max inflight bytes value
+     *
+     * @return size_t
+     */
+  size_t get_max_inflight_bytes() const {
+    return _max_inflight;
+  }
+
+  // system callbacks (do not call if from user code!)
+  void _onAck(size_t len, uint32_t time);
+  void _onPoll();
+  void _onTimeout(uint32_t time);
+  void _onDisconnect();
+};
+
+/**
+ * @brief a class that maintains all connected HTTP clients subscribed to SSE delivery
+ * dispatches supplied messages to the client's queues
+ *
+ */
+class AsyncEventSource : public AsyncWebHandler {
+private:
+  String _url;
+  std::list<std::unique_ptr<AsyncEventSourceClient>> _clients;
+#ifdef ESP32
+  // Same as for individual messages, protect mutations of _clients list
+  // since simultaneous access from different tasks is possible
+  mutable std::recursive_mutex _client_queue_lock;
+#endif
+  ArEventHandlerFunction _connectcb = nullptr;
+  ArEventHandlerFunction _disconnectcb = nullptr;
+
+  // this method manipulates in-fligh data size for connected client depending on number of active connections
+  void _adjust_inflight_window();
+
+public:
+  typedef enum {
+    DISCARDED = 0,
+    ENQUEUED = 1,
+    PARTIALLY_ENQUEUED = 2,
+  } SendStatus;
+
+  AsyncEventSource(const char *url) : _url(url){};
+  AsyncEventSource(const String &url) : _url(url){};
+  ~AsyncEventSource() {
+    close();
+  };
+
+  const char *url() const {
+    return _url.c_str();
+  }
+  // close all connected clients
+  void close();
+
+  /**
+     * @brief set on-connect callback for the client
+     * used to deliver messages to client on first connect
+     *
+     * @param cb
+     */
+  void onConnect(ArEventHandlerFunction cb) {
+    _connectcb = cb;
+  }
+
+  /**
+     * @brief Send an SSE message to client
+     * it will craft an SSE message and place it to all connected client's message queues
+     *
+     * @param message body string, could be single or multi-line string sepprated by \n, \r, \r\n
+     * @param event body string, a sinle line string
+     * @param id sequence id
+     * @param reconnect client's reconnect timeout
+     * @return SendStatus if message was placed in any/all/part of the client's queues
+     */
+  SendStatus send(const char *message, const char *event = NULL, uint32_t id = 0, uint32_t reconnect = 0);
+  SendStatus send(const String &message, const String &event, uint32_t id = 0, uint32_t reconnect = 0) {
+    return send(message.c_str(), event.c_str(), id, reconnect);
+  }
+  SendStatus send(const String &message, const char *event, uint32_t id = 0, uint32_t reconnect = 0) {
+    return send(message.c_str(), event, id, reconnect);
+  }
+
+  // The client pointer sent to the callback is only for reference purposes. DO NOT CALL ANY METHOD ON IT !
+  void onDisconnect(ArEventHandlerFunction cb) {
+    _disconnectcb = cb;
+  }
+  void authorizeConnect(ArAuthorizeConnectHandler cb);
+
+  // returns number of connected clients
+  size_t count() const;
+
+  // returns average number of messages pending in all client's queues
+  size_t avgPacketsWaiting() const;
+
+  // system callbacks (do not call from user code!)
+  void _addClient(AsyncEventSourceClient *client);
+  void _handleDisconnect(AsyncEventSourceClient *client);
+  bool canHandle(AsyncWebServerRequest *request) const override final;
+  void handleRequest(AsyncWebServerRequest *request) override final;
+};
+
+class AsyncEventSourceResponse : public AsyncWebServerResponse {
+private:
+  AsyncEventSource *_server;
+
+public:
+  AsyncEventSourceResponse(AsyncEventSource *server);
+  void _respond(AsyncWebServerRequest *request);
+  size_t _ack(AsyncWebServerRequest *request, size_t len, uint32_t time);
+  bool _sourceValid() const {
+    return true;
+  }
+};
+
+#endif /* ASYNCEVENTSOURCE_H_ */

Raumtermostat/lib/ESPAsyncWebServer/src/AsyncJson.cpp

@@ -0,0 +1,167 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+#include "AsyncJson.h"
+
+#if ASYNC_JSON_SUPPORT == 1
+
+#if ARDUINOJSON_VERSION_MAJOR == 5
+AsyncJsonResponse::AsyncJsonResponse(bool isArray) : _isValid{false} {
+  _code = 200;
+  _contentType = asyncsrv::T_application_json;
+  if (isArray) {
+    _root = _jsonBuffer.createArray();
+  } else {
+    _root = _jsonBuffer.createObject();
+  }
+}
+#elif ARDUINOJSON_VERSION_MAJOR == 6
+AsyncJsonResponse::AsyncJsonResponse(bool isArray, size_t maxJsonBufferSize) : _jsonBuffer(maxJsonBufferSize), _isValid{false} {
+  _code = 200;
+  _contentType = asyncsrv::T_application_json;
+  if (isArray) {
+    _root = _jsonBuffer.createNestedArray();
+  } else {
+    _root = _jsonBuffer.createNestedObject();
+  }
+}
+#else
+AsyncJsonResponse::AsyncJsonResponse(bool isArray) : _isValid{false} {
+  _code = 200;
+  _contentType = asyncsrv::T_application_json;
+  if (isArray) {
+    _root = _jsonBuffer.add<JsonArray>();
+  } else {
+    _root = _jsonBuffer.add<JsonObject>();
+  }
+}
+#endif
+
+size_t AsyncJsonResponse::setLength() {
+#if ARDUINOJSON_VERSION_MAJOR == 5
+  _contentLength = _root.measureLength();
+#else
+  _contentLength = measureJson(_root);
+#endif
+  if (_contentLength) {
+    _isValid = true;
+  }
+  return _contentLength;
+}
+
+size_t AsyncJsonResponse::_fillBuffer(uint8_t *data, size_t len) {
+  ChunkPrint dest(data, _sentLength, len);
+#if ARDUINOJSON_VERSION_MAJOR == 5
+  _root.printTo(dest);
+#else
+  serializeJson(_root, dest);
+#endif
+  return len;
+}
+
+#if ARDUINOJSON_VERSION_MAJOR == 6
+PrettyAsyncJsonResponse::PrettyAsyncJsonResponse(bool isArray, size_t maxJsonBufferSize) : AsyncJsonResponse{isArray, maxJsonBufferSize} {}
+#else
+PrettyAsyncJsonResponse::PrettyAsyncJsonResponse(bool isArray) : AsyncJsonResponse{isArray} {}
+#endif
+
+size_t PrettyAsyncJsonResponse::setLength() {
+#if ARDUINOJSON_VERSION_MAJOR == 5
+  _contentLength = _root.measurePrettyLength();
+#else
+  _contentLength = measureJsonPretty(_root);
+#endif
+  if (_contentLength) {
+    _isValid = true;
+  }
+  return _contentLength;
+}
+
+size_t PrettyAsyncJsonResponse::_fillBuffer(uint8_t *data, size_t len) {
+  ChunkPrint dest(data, _sentLength, len);
+#if ARDUINOJSON_VERSION_MAJOR == 5
+  _root.prettyPrintTo(dest);
+#else
+  serializeJsonPretty(_root, dest);
+#endif
+  return len;
+}
+
+#if ARDUINOJSON_VERSION_MAJOR == 6
+AsyncCallbackJsonWebHandler::AsyncCallbackJsonWebHandler(const String &uri, ArJsonRequestHandlerFunction onRequest, size_t maxJsonBufferSize)
+  : _uri(uri), _method(HTTP_GET | HTTP_POST | HTTP_PUT | HTTP_PATCH), _onRequest(onRequest), maxJsonBufferSize(maxJsonBufferSize), _maxContentLength(16384) {}
+#else
+AsyncCallbackJsonWebHandler::AsyncCallbackJsonWebHandler(const String &uri, ArJsonRequestHandlerFunction onRequest)
+  : _uri(uri), _method(HTTP_GET | HTTP_POST | HTTP_PUT | HTTP_PATCH), _onRequest(onRequest), _maxContentLength(16384) {}
+#endif
+
+bool AsyncCallbackJsonWebHandler::canHandle(AsyncWebServerRequest *request) const {
+  if (!_onRequest || !request->isHTTP() || !(_method & request->method())) {
+    return false;
+  }
+
+  if (_uri.length() && (_uri != request->url() && !request->url().startsWith(_uri + "/"))) {
+    return false;
+  }
+
+  if (request->method() != HTTP_GET && !request->contentType().equalsIgnoreCase(asyncsrv::T_application_json)) {
+    return false;
+  }
+
+  return true;
+}
+
+void AsyncCallbackJsonWebHandler::handleRequest(AsyncWebServerRequest *request) {
+  if (_onRequest) {
+    if (request->method() == HTTP_GET) {
+      JsonVariant json;
+      _onRequest(request, json);
+      return;
+    } else if (request->_tempObject != NULL) {
+
+#if ARDUINOJSON_VERSION_MAJOR == 5
+      DynamicJsonBuffer jsonBuffer;
+      JsonVariant json = jsonBuffer.parse((uint8_t *)(request->_tempObject));
+      if (json.success()) {
+#elif ARDUINOJSON_VERSION_MAJOR == 6
+      DynamicJsonDocument jsonBuffer(this->maxJsonBufferSize);
+      DeserializationError error = deserializeJson(jsonBuffer, (uint8_t *)(request->_tempObject));
+      if (!error) {
+        JsonVariant json = jsonBuffer.as<JsonVariant>();
+#else
+      JsonDocument jsonBuffer;
+      DeserializationError error = deserializeJson(jsonBuffer, (uint8_t *)(request->_tempObject));
+      if (!error) {
+        JsonVariant json = jsonBuffer.as<JsonVariant>();
+#endif
+
+        _onRequest(request, json);
+        return;
+      }
+    }
+    request->send(_contentLength > _maxContentLength ? 413 : 400);
+  } else {
+    request->send(500);
+  }
+}
+
+void AsyncCallbackJsonWebHandler::handleBody(AsyncWebServerRequest *request, uint8_t *data, size_t len, size_t index, size_t total) {
+  if (_onRequest) {
+    _contentLength = total;
+    if (total > 0 && request->_tempObject == NULL && total < _maxContentLength) {
+      request->_tempObject = malloc(total);
+      if (request->_tempObject == NULL) {
+#ifdef ESP32
+        log_e("Failed to allocate");
+#endif
+        request->abort();
+        return;
+      }
+    }
+    if (request->_tempObject != NULL) {
+      memcpy((uint8_t *)(request->_tempObject) + index, data, len);
+    }
+  }
+}
+
+#endif  // ASYNC_JSON_SUPPORT

Raumtermostat/lib/ESPAsyncWebServer/src/AsyncJson.h

@@ -0,0 +1,119 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+#ifndef ASYNC_JSON_H_
+#define ASYNC_JSON_H_
+
+#if __has_include("ArduinoJson.h")
+#include <ArduinoJson.h>
+#if ARDUINOJSON_VERSION_MAJOR >= 5
+#define ASYNC_JSON_SUPPORT 1
+#else
+#define ASYNC_JSON_SUPPORT 0
+#endif  // ARDUINOJSON_VERSION_MAJOR >= 5
+#endif  // __has_include("ArduinoJson.h")
+
+#if ASYNC_JSON_SUPPORT == 1
+#include <ESPAsyncWebServer.h>
+
+#include "ChunkPrint.h"
+
+#if ARDUINOJSON_VERSION_MAJOR == 6
+#ifndef DYNAMIC_JSON_DOCUMENT_SIZE
+#define DYNAMIC_JSON_DOCUMENT_SIZE 1024
+#endif
+#endif
+
+class AsyncJsonResponse : public AsyncAbstractResponse {
+protected:
+#if ARDUINOJSON_VERSION_MAJOR == 5
+  DynamicJsonBuffer _jsonBuffer;
+#elif ARDUINOJSON_VERSION_MAJOR == 6
+  DynamicJsonDocument _jsonBuffer;
+#else
+  JsonDocument _jsonBuffer;
+#endif
+
+  JsonVariant _root;
+  bool _isValid;
+
+public:
+#if ARDUINOJSON_VERSION_MAJOR == 6
+  AsyncJsonResponse(bool isArray = false, size_t maxJsonBufferSize = DYNAMIC_JSON_DOCUMENT_SIZE);
+#else
+  AsyncJsonResponse(bool isArray = false);
+#endif
+  JsonVariant &getRoot() {
+    return _root;
+  }
+  bool _sourceValid() const {
+    return _isValid;
+  }
+  size_t setLength();
+  size_t getSize() const {
+    return _jsonBuffer.size();
+  }
+  size_t _fillBuffer(uint8_t *data, size_t len);
+#if ARDUINOJSON_VERSION_MAJOR >= 6
+  bool overflowed() const {
+    return _jsonBuffer.overflowed();
+  }
+#endif
+};
+
+class PrettyAsyncJsonResponse : public AsyncJsonResponse {
+public:
+#if ARDUINOJSON_VERSION_MAJOR == 6
+  PrettyAsyncJsonResponse(bool isArray = false, size_t maxJsonBufferSize = DYNAMIC_JSON_DOCUMENT_SIZE);
+#else
+  PrettyAsyncJsonResponse(bool isArray = false);
+#endif
+  size_t setLength();
+  size_t _fillBuffer(uint8_t *data, size_t len);
+};
+
+typedef std::function<void(AsyncWebServerRequest *request, JsonVariant &json)> ArJsonRequestHandlerFunction;
+
+class AsyncCallbackJsonWebHandler : public AsyncWebHandler {
+protected:
+  String _uri;
+  WebRequestMethodComposite _method;
+  ArJsonRequestHandlerFunction _onRequest;
+  size_t _contentLength;
+#if ARDUINOJSON_VERSION_MAJOR == 6
+  size_t maxJsonBufferSize;
+#endif
+  size_t _maxContentLength;
+
+public:
+#if ARDUINOJSON_VERSION_MAJOR == 6
+  AsyncCallbackJsonWebHandler(const String &uri, ArJsonRequestHandlerFunction onRequest = nullptr, size_t maxJsonBufferSize = DYNAMIC_JSON_DOCUMENT_SIZE);
+#else
+  AsyncCallbackJsonWebHandler(const String &uri, ArJsonRequestHandlerFunction onRequest = nullptr);
+#endif
+
+  void setMethod(WebRequestMethodComposite method) {
+    _method = method;
+  }
+  void setMaxContentLength(int maxContentLength) {
+    _maxContentLength = maxContentLength;
+  }
+  void onRequest(ArJsonRequestHandlerFunction fn) {
+    _onRequest = fn;
+  }
+
+  bool canHandle(AsyncWebServerRequest *request) const override final;
+  void handleRequest(AsyncWebServerRequest *request) override final;
+  void handleUpload(
+    __unused AsyncWebServerRequest *request, __unused const String &filename, __unused size_t index, __unused uint8_t *data, __unused size_t len,
+    __unused bool final
+  ) override final {}
+  void handleBody(AsyncWebServerRequest *request, uint8_t *data, size_t len, size_t index, size_t total) override final;
+  bool isRequestHandlerTrivial() const override final {
+    return !_onRequest;
+  }
+};
+
+#endif  // ASYNC_JSON_SUPPORT == 1
+
+#endif  // ASYNC_JSON_H_

Raumtermostat/lib/ESPAsyncWebServer/src/AsyncMessagePack.cpp

@@ -0,0 +1,119 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+#include "AsyncMessagePack.h"
+
+#if ASYNC_MSG_PACK_SUPPORT == 1
+
+#if ARDUINOJSON_VERSION_MAJOR == 6
+AsyncMessagePackResponse::AsyncMessagePackResponse(bool isArray, size_t maxJsonBufferSize) : _jsonBuffer(maxJsonBufferSize), _isValid{false} {
+  _code = 200;
+  _contentType = asyncsrv::T_application_msgpack;
+  if (isArray) {
+    _root = _jsonBuffer.createNestedArray();
+  } else {
+    _root = _jsonBuffer.createNestedObject();
+  }
+}
+#else
+AsyncMessagePackResponse::AsyncMessagePackResponse(bool isArray) : _isValid{false} {
+  _code = 200;
+  _contentType = asyncsrv::T_application_msgpack;
+  if (isArray) {
+    _root = _jsonBuffer.add<JsonArray>();
+  } else {
+    _root = _jsonBuffer.add<JsonObject>();
+  }
+}
+#endif
+
+size_t AsyncMessagePackResponse::setLength() {
+  _contentLength = measureMsgPack(_root);
+  if (_contentLength) {
+    _isValid = true;
+  }
+  return _contentLength;
+}
+
+size_t AsyncMessagePackResponse::_fillBuffer(uint8_t *data, size_t len) {
+  ChunkPrint dest(data, _sentLength, len);
+  serializeMsgPack(_root, dest);
+  return len;
+}
+
+#if ARDUINOJSON_VERSION_MAJOR == 6
+AsyncCallbackMessagePackWebHandler::AsyncCallbackMessagePackWebHandler(
+  const String &uri, ArMessagePackRequestHandlerFunction onRequest, size_t maxJsonBufferSize
+)
+  : _uri(uri), _method(HTTP_GET | HTTP_POST | HTTP_PUT | HTTP_PATCH), _onRequest(onRequest), maxJsonBufferSize(maxJsonBufferSize), _maxContentLength(16384) {}
+#else
+AsyncCallbackMessagePackWebHandler::AsyncCallbackMessagePackWebHandler(const String &uri, ArMessagePackRequestHandlerFunction onRequest)
+  : _uri(uri), _method(HTTP_GET | HTTP_POST | HTTP_PUT | HTTP_PATCH), _onRequest(onRequest), _maxContentLength(16384) {}
+#endif
+
+bool AsyncCallbackMessagePackWebHandler::canHandle(AsyncWebServerRequest *request) const {
+  if (!_onRequest || !request->isHTTP() || !(_method & request->method())) {
+    return false;
+  }
+
+  if (_uri.length() && (_uri != request->url() && !request->url().startsWith(_uri + "/"))) {
+    return false;
+  }
+
+  if (request->method() != HTTP_GET && !request->contentType().equalsIgnoreCase(asyncsrv::T_application_msgpack)) {
+    return false;
+  }
+
+  return true;
+}
+
+void AsyncCallbackMessagePackWebHandler::handleRequest(AsyncWebServerRequest *request) {
+  if (_onRequest) {
+    if (request->method() == HTTP_GET) {
+      JsonVariant json;
+      _onRequest(request, json);
+      return;
+    } else if (request->_tempObject != NULL) {
+
+#if ARDUINOJSON_VERSION_MAJOR == 6
+      DynamicJsonDocument jsonBuffer(this->maxJsonBufferSize);
+      DeserializationError error = deserializeMsgPack(jsonBuffer, (uint8_t *)(request->_tempObject));
+      if (!error) {
+        JsonVariant json = jsonBuffer.as<JsonVariant>();
+#else
+      JsonDocument jsonBuffer;
+      DeserializationError error = deserializeMsgPack(jsonBuffer, (uint8_t *)(request->_tempObject));
+      if (!error) {
+        JsonVariant json = jsonBuffer.as<JsonVariant>();
+#endif
+
+        _onRequest(request, json);
+        return;
+      }
+    }
+    request->send(_contentLength > _maxContentLength ? 413 : 400);
+  } else {
+    request->send(500);
+  }
+}
+
+void AsyncCallbackMessagePackWebHandler::handleBody(AsyncWebServerRequest *request, uint8_t *data, size_t len, size_t index, size_t total) {
+  if (_onRequest) {
+    _contentLength = total;
+    if (total > 0 && request->_tempObject == NULL && total < _maxContentLength) {
+      request->_tempObject = malloc(total);
+      if (request->_tempObject == NULL) {
+#ifdef ESP32
+        log_e("Failed to allocate");
+#endif
+        request->abort();
+        return;
+      }
+    }
+    if (request->_tempObject != NULL) {
+      memcpy((uint8_t *)(request->_tempObject) + index, data, len);
+    }
+  }
+}
+
+#endif  // ASYNC_MSG_PACK_SUPPORT

Raumtermostat/lib/ESPAsyncWebServer/src/AsyncMessagePack.h

@@ -0,0 +1,126 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+#pragma once
+
+/*
+   server.on("/msg_pack", HTTP_ANY, [](AsyncWebServerRequest * request) {
+    AsyncMessagePackResponse * response = new AsyncMessagePackResponse();
+    JsonObject& root = response->getRoot();
+    root["key1"] = "key number one";
+    JsonObject& nested = root.createNestedObject("nested");
+    nested["key1"] = "key number one";
+    response->setLength();
+    request->send(response);
+  });
+
+  --------------------
+
+  AsyncCallbackMessagePackWebHandler* handler = new AsyncCallbackMessagePackWebHandler("/msg_pack/endpoint");
+  handler->onRequest([](AsyncWebServerRequest *request, JsonVariant &json) {
+    JsonObject jsonObj = json.as<JsonObject>();
+    // ...
+  });
+  server.addHandler(handler);
+*/
+
+#if __has_include("ArduinoJson.h")
+#include <ArduinoJson.h>
+#if ARDUINOJSON_VERSION_MAJOR >= 6
+#define ASYNC_MSG_PACK_SUPPORT 1
+#else
+#define ASYNC_MSG_PACK_SUPPORT 0
+#endif  // ARDUINOJSON_VERSION_MAJOR >= 6
+#endif  // __has_include("ArduinoJson.h")
+
+#if ASYNC_MSG_PACK_SUPPORT == 1
+#include <ESPAsyncWebServer.h>
+
+#include "ChunkPrint.h"
+
+#if ARDUINOJSON_VERSION_MAJOR == 6
+#ifndef DYNAMIC_JSON_DOCUMENT_SIZE
+#define DYNAMIC_JSON_DOCUMENT_SIZE 1024
+#endif
+#endif
+
+class AsyncMessagePackResponse : public AsyncAbstractResponse {
+protected:
+#if ARDUINOJSON_VERSION_MAJOR == 6
+  DynamicJsonDocument _jsonBuffer;
+#else
+  JsonDocument _jsonBuffer;
+#endif
+
+  JsonVariant _root;
+  bool _isValid;
+
+public:
+#if ARDUINOJSON_VERSION_MAJOR == 6
+  AsyncMessagePackResponse(bool isArray = false, size_t maxJsonBufferSize = DYNAMIC_JSON_DOCUMENT_SIZE);
+#else
+  AsyncMessagePackResponse(bool isArray = false);
+#endif
+  JsonVariant &getRoot() {
+    return _root;
+  }
+  bool _sourceValid() const {
+    return _isValid;
+  }
+  size_t setLength();
+  size_t getSize() const {
+    return _jsonBuffer.size();
+  }
+  size_t _fillBuffer(uint8_t *data, size_t len);
+#if ARDUINOJSON_VERSION_MAJOR >= 6
+  bool overflowed() const {
+    return _jsonBuffer.overflowed();
+  }
+#endif
+};
+
+typedef std::function<void(AsyncWebServerRequest *request, JsonVariant &json)> ArMessagePackRequestHandlerFunction;
+
+class AsyncCallbackMessagePackWebHandler : public AsyncWebHandler {
+protected:
+  String _uri;
+  WebRequestMethodComposite _method;
+  ArMessagePackRequestHandlerFunction _onRequest;
+  size_t _contentLength;
+#if ARDUINOJSON_VERSION_MAJOR == 6
+  size_t maxJsonBufferSize;
+#endif
+  size_t _maxContentLength;
+
+public:
+#if ARDUINOJSON_VERSION_MAJOR == 6
+  AsyncCallbackMessagePackWebHandler(
+    const String &uri, ArMessagePackRequestHandlerFunction onRequest = nullptr, size_t maxJsonBufferSize = DYNAMIC_JSON_DOCUMENT_SIZE
+  );
+#else
+  AsyncCallbackMessagePackWebHandler(const String &uri, ArMessagePackRequestHandlerFunction onRequest = nullptr);
+#endif
+
+  void setMethod(WebRequestMethodComposite method) {
+    _method = method;
+  }
+  void setMaxContentLength(int maxContentLength) {
+    _maxContentLength = maxContentLength;
+  }
+  void onRequest(ArMessagePackRequestHandlerFunction fn) {
+    _onRequest = fn;
+  }
+
+  bool canHandle(AsyncWebServerRequest *request) const override final;
+  void handleRequest(AsyncWebServerRequest *request) override final;
+  void handleUpload(
+    __unused AsyncWebServerRequest *request, __unused const String &filename, __unused size_t index, __unused uint8_t *data, __unused size_t len,
+    __unused bool final
+  ) override final {}
+  void handleBody(AsyncWebServerRequest *request, uint8_t *data, size_t len, size_t index, size_t total) override final;
+  bool isRequestHandlerTrivial() const override final {
+    return !_onRequest;
+  }
+};
+
+#endif  // ASYNC_MSG_PACK_SUPPORT == 1

Raumtermostat/lib/ESPAsyncWebServer/src/AsyncWebHeader.cpp

@@ -0,0 +1,32 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+#include <ESPAsyncWebServer.h>
+
+AsyncWebHeader::AsyncWebHeader(const String &data) {
+  if (!data) {
+    return;
+  }
+  int index = data.indexOf(':');
+  if (index < 0) {
+    return;
+  }
+  _name = data.substring(0, index);
+  _value = data.substring(index + 2);
+}
+
+String AsyncWebHeader::toString() const {
+  String str;
+  if (str.reserve(_name.length() + _value.length() + 2)) {
+    str.concat(_name);
+    str.concat((char)0x3a);
+    str.concat((char)0x20);
+    str.concat(_value);
+    str.concat(asyncsrv::T_rn);
+  } else {
+#ifdef ESP32
+    log_e("Failed to allocate");
+#endif
+  }
+  return str;
+}

Raumtermostat/lib/ESPAsyncWebServer/src/AsyncWebServerVersion.h

@@ -0,0 +1,40 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+#pragma once
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/** Major version number (X.x.x) */
+#define ASYNCWEBSERVER_VERSION_MAJOR 3
+/** Minor version number (x.X.x) */
+#define ASYNCWEBSERVER_VERSION_MINOR 7
+/** Patch version number (x.x.X) */
+#define ASYNCWEBSERVER_VERSION_PATCH 6
+
+/**
+ * Macro to convert version number into an integer
+ *
+ * To be used in comparisons, such as ASYNCWEBSERVER_VERSION >= ASYNCWEBSERVER_VERSION_VAL(2, 0, 0)
+ */
+#define ASYNCWEBSERVER_VERSION_VAL(major, minor, patch) ((major << 16) | (minor << 8) | (patch))
+
+/**
+ * Current version, as an integer
+ *
+ * To be used in comparisons, such as ASYNCWEBSERVER_VERSION_NUM >= ASYNCWEBSERVER_VERSION_VAL(2, 0, 0)
+ */
+#define ASYNCWEBSERVER_VERSION_NUM ASYNCWEBSERVER_VERSION_VAL(ASYNCWEBSERVER_VERSION_MAJOR, ASYNCWEBSERVER_VERSION_MINOR, ASYNCWEBSERVER_VERSION_PATCH)
+
+/**
+ * Current version, as string
+ */
+#define df2xstr(s)             #s
+#define df2str(s)              df2xstr(s)
+#define ASYNCWEBSERVER_VERSION df2str(ASYNCWEBSERVER_VERSION_MAJOR) "." df2str(ASYNCWEBSERVER_VERSION_MINOR) "." df2str(ASYNCWEBSERVER_VERSION_PATCH)
+
+#ifdef __cplusplus
+}
+#endif

Raumtermostat/lib/ESPAsyncWebServer/src/AsyncWebSocket.h

@@ -0,0 +1,499 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+#ifndef ASYNCWEBSOCKET_H_
+#define ASYNCWEBSOCKET_H_
+
+#include <Arduino.h>
+#ifdef ESP32
+#include <AsyncTCP.h>
+#include <mutex>
+#ifndef WS_MAX_QUEUED_MESSAGES
+#define WS_MAX_QUEUED_MESSAGES 32
+#endif
+#elif defined(ESP8266)
+#include <ESPAsyncTCP.h>
+#ifndef WS_MAX_QUEUED_MESSAGES
+#define WS_MAX_QUEUED_MESSAGES 8
+#endif
+#elif defined(TARGET_RP2040) || defined(TARGET_RP2350) || defined(PICO_RP2040) || defined(PICO_RP2350)
+#include <RPAsyncTCP.h>
+#ifndef WS_MAX_QUEUED_MESSAGES
+#define WS_MAX_QUEUED_MESSAGES 32
+#endif
+#endif
+
+#include <ESPAsyncWebServer.h>
+
+#include <memory>
+
+#ifdef ESP8266
+#include <Hash.h>
+#ifdef CRYPTO_HASH_h  // include Hash.h from espressif framework if the first include was from the crypto library
+#include <../src/Hash.h>
+#endif
+#endif
+
+#ifndef DEFAULT_MAX_WS_CLIENTS
+#ifdef ESP32
+#define DEFAULT_MAX_WS_CLIENTS 8
+#else
+#define DEFAULT_MAX_WS_CLIENTS 4
+#endif
+#endif
+
+using AsyncWebSocketSharedBuffer = std::shared_ptr<std::vector<uint8_t>>;
+
+class AsyncWebSocket;
+class AsyncWebSocketResponse;
+class AsyncWebSocketClient;
+class AsyncWebSocketControl;
+
+typedef struct {
+  /** Message type as defined by enum AwsFrameType.
+     * Note: Applications will only see WS_TEXT and WS_BINARY.
+     * All other types are handled by the library. */
+  uint8_t message_opcode;
+  /** Frame number of a fragmented message. */
+  uint32_t num;
+  /** Is this the last frame in a fragmented message ?*/
+  uint8_t final;
+  /** Is this frame masked? */
+  uint8_t masked;
+  /** Message type as defined by enum AwsFrameType.
+     * This value is the same as message_opcode for non-fragmented
+     * messages, but may also be WS_CONTINUATION in a fragmented message. */
+  uint8_t opcode;
+  /** Length of the current frame.
+     * This equals the total length of the message if num == 0 && final == true */
+  uint64_t len;
+  /** Mask key */
+  uint8_t mask[4];
+  /** Offset of the data inside the current frame. */
+  uint64_t index;
+} AwsFrameInfo;
+
+typedef enum {
+  WS_DISCONNECTED,
+  WS_CONNECTED,
+  WS_DISCONNECTING
+} AwsClientStatus;
+typedef enum {
+  WS_CONTINUATION,
+  WS_TEXT,
+  WS_BINARY,
+  WS_DISCONNECT = 0x08,
+  WS_PING,
+  WS_PONG
+} AwsFrameType;
+typedef enum {
+  WS_MSG_SENDING,
+  WS_MSG_SENT,
+  WS_MSG_ERROR
+} AwsMessageStatus;
+typedef enum {
+  WS_EVT_CONNECT,
+  WS_EVT_DISCONNECT,
+  WS_EVT_PING,
+  WS_EVT_PONG,
+  WS_EVT_ERROR,
+  WS_EVT_DATA
+} AwsEventType;
+
+class AsyncWebSocketMessageBuffer {
+  friend AsyncWebSocket;
+  friend AsyncWebSocketClient;
+
+private:
+  AsyncWebSocketSharedBuffer _buffer;
+
+public:
+  AsyncWebSocketMessageBuffer() {}
+  explicit AsyncWebSocketMessageBuffer(size_t size);
+  AsyncWebSocketMessageBuffer(const uint8_t *data, size_t size);
+  //~AsyncWebSocketMessageBuffer();
+  bool reserve(size_t size);
+  uint8_t *get() {
+    return _buffer->data();
+  }
+  size_t length() const {
+    return _buffer->size();
+  }
+};
+
+class AsyncWebSocketMessage {
+private:
+  AsyncWebSocketSharedBuffer _WSbuffer;
+  uint8_t _opcode{WS_TEXT};
+  bool _mask{false};
+  AwsMessageStatus _status{WS_MSG_ERROR};
+  size_t _sent{};
+  size_t _ack{};
+  size_t _acked{};
+
+public:
+  AsyncWebSocketMessage(AsyncWebSocketSharedBuffer buffer, uint8_t opcode = WS_TEXT, bool mask = false);
+
+  bool finished() const {
+    return _status != WS_MSG_SENDING;
+  }
+  bool betweenFrames() const {
+    return _acked == _ack;
+  }
+
+  void ack(size_t len, uint32_t time);
+  size_t send(AsyncClient *client);
+};
+
+class AsyncWebSocketClient {
+private:
+  AsyncClient *_client;
+  AsyncWebSocket *_server;
+  uint32_t _clientId;
+  AwsClientStatus _status;
+#ifdef ESP32
+  mutable std::recursive_mutex _lock;
+#endif
+  std::deque<AsyncWebSocketControl> _controlQueue;
+  std::deque<AsyncWebSocketMessage> _messageQueue;
+  bool closeWhenFull = true;
+
+  uint8_t _pstate;
+  AwsFrameInfo _pinfo;
+
+  uint32_t _lastMessageTime;
+  uint32_t _keepAlivePeriod;
+
+  bool _queueControl(uint8_t opcode, const uint8_t *data = NULL, size_t len = 0, bool mask = false);
+  bool _queueMessage(AsyncWebSocketSharedBuffer buffer, uint8_t opcode = WS_TEXT, bool mask = false);
+  void _runQueue();
+  void _clearQueue();
+
+public:
+  void *_tempObject;
+
+  AsyncWebSocketClient(AsyncWebServerRequest *request, AsyncWebSocket *server);
+  ~AsyncWebSocketClient();
+
+  // client id increments for the given server
+  uint32_t id() const {
+    return _clientId;
+  }
+  AwsClientStatus status() const {
+    return _status;
+  }
+  AsyncClient *client() {
+    return _client;
+  }
+  const AsyncClient *client() const {
+    return _client;
+  }
+  AsyncWebSocket *server() {
+    return _server;
+  }
+  const AsyncWebSocket *server() const {
+    return _server;
+  }
+  AwsFrameInfo const &pinfo() const {
+    return _pinfo;
+  }
+
+  //  - If "true" (default), the connection will be closed if the message queue is full.
+  // This is the default behavior in yubox-node-org, which is not silently discarding messages but instead closes the connection.
+  // The big issue with this behavior is  that is can cause the UI to automatically re-create a new WS connection, which can be filled again,
+  // and so on, causing a resource exhaustion.
+  //
+  // - If "false", the incoming message will be discarded if the queue is full.
+  // This is the default behavior in the original ESPAsyncWebServer library from me-no-dev.
+  // This behavior allows the best performance at the expense of unreliable message delivery in case the queue is full (some messages may be lost).
+  //
+  // - In any case, when the queue is full, a message is logged.
+  // - IT is recommended to use the methods queueIsFull(), availableForWriteAll(), availableForWrite(clientId) to check if the queue is full before sending a message.
+  //
+  // Usage:
+  //  - can be set in the onEvent listener when connecting (event type is: WS_EVT_CONNECT)
+  //
+  // Use cases:,
+  // - if using websocket to send logging messages, maybe some loss is acceptable.
+  // - But if using websocket to send UI update messages, maybe the connection should be closed and the UI redrawn.
+  void setCloseClientOnQueueFull(bool close) {
+    closeWhenFull = close;
+  }
+  bool willCloseClientOnQueueFull() const {
+    return closeWhenFull;
+  }
+
+  IPAddress remoteIP() const;
+  uint16_t remotePort() const;
+
+  bool shouldBeDeleted() const {
+    return !_client;
+  }
+
+  // control frames
+  void close(uint16_t code = 0, const char *message = NULL);
+  bool ping(const uint8_t *data = NULL, size_t len = 0);
+
+  // set auto-ping period in seconds. disabled if zero (default)
+  void keepAlivePeriod(uint16_t seconds) {
+    _keepAlivePeriod = seconds * 1000;
+  }
+  uint16_t keepAlivePeriod() {
+    return (uint16_t)(_keepAlivePeriod / 1000);
+  }
+
+  // data packets
+  void message(AsyncWebSocketSharedBuffer buffer, uint8_t opcode = WS_TEXT, bool mask = false) {
+    _queueMessage(buffer, opcode, mask);
+  }
+  bool queueIsFull() const;
+  size_t queueLen() const;
+
+  size_t printf(const char *format, ...) __attribute__((format(printf, 2, 3)));
+
+  bool text(AsyncWebSocketSharedBuffer buffer);
+  bool text(const uint8_t *message, size_t len);
+  bool text(const char *message, size_t len);
+  bool text(const char *message);
+  bool text(const String &message);
+  bool text(AsyncWebSocketMessageBuffer *buffer);
+
+  bool binary(AsyncWebSocketSharedBuffer buffer);
+  bool binary(const uint8_t *message, size_t len);
+  bool binary(const char *message, size_t len);
+  bool binary(const char *message);
+  bool binary(const String &message);
+  bool binary(AsyncWebSocketMessageBuffer *buffer);
+
+  bool canSend() const;
+
+  // system callbacks (do not call)
+  void _onAck(size_t len, uint32_t time);
+  void _onError(int8_t);
+  void _onPoll();
+  void _onTimeout(uint32_t time);
+  void _onDisconnect();
+  void _onData(void *pbuf, size_t plen);
+
+#ifdef ESP8266
+  size_t printf_P(PGM_P formatP, ...) __attribute__((format(printf, 2, 3)));
+  bool text(const __FlashStringHelper *message);
+  bool binary(const __FlashStringHelper *message, size_t len);
+#endif
+};
+
+using AwsHandshakeHandler = std::function<bool(AsyncWebServerRequest *request)>;
+using AwsEventHandler = std::function<void(AsyncWebSocket *server, AsyncWebSocketClient *client, AwsEventType type, void *arg, uint8_t *data, size_t len)>;
+
+// WebServer Handler implementation that plays the role of a socket server
+class AsyncWebSocket : public AsyncWebHandler {
+private:
+  String _url;
+  std::list<AsyncWebSocketClient> _clients;
+  uint32_t _cNextId;
+  AwsEventHandler _eventHandler;
+  AwsHandshakeHandler _handshakeHandler;
+  bool _enabled;
+#ifdef ESP32
+  mutable std::mutex _lock;
+#endif
+
+public:
+  typedef enum {
+    DISCARDED = 0,
+    ENQUEUED = 1,
+    PARTIALLY_ENQUEUED = 2,
+  } SendStatus;
+
+  explicit AsyncWebSocket(const char *url, AwsEventHandler handler = nullptr) : _url(url), _cNextId(1), _eventHandler(handler), _enabled(true) {}
+  AsyncWebSocket(const String &url, AwsEventHandler handler = nullptr) : _url(url), _cNextId(1), _eventHandler(handler), _enabled(true) {}
+  ~AsyncWebSocket(){};
+  const char *url() const {
+    return _url.c_str();
+  }
+  void enable(bool e) {
+    _enabled = e;
+  }
+  bool enabled() const {
+    return _enabled;
+  }
+  bool availableForWriteAll();
+  bool availableForWrite(uint32_t id);
+
+  size_t count() const;
+  AsyncWebSocketClient *client(uint32_t id);
+  bool hasClient(uint32_t id) {
+    return client(id) != nullptr;
+  }
+
+  void close(uint32_t id, uint16_t code = 0, const char *message = NULL);
+  void closeAll(uint16_t code = 0, const char *message = NULL);
+  void cleanupClients(uint16_t maxClients = DEFAULT_MAX_WS_CLIENTS);
+
+  bool ping(uint32_t id, const uint8_t *data = NULL, size_t len = 0);
+  SendStatus pingAll(const uint8_t *data = NULL, size_t len = 0);  //  done
+
+  bool text(uint32_t id, const uint8_t *message, size_t len);
+  bool text(uint32_t id, const char *message, size_t len);
+  bool text(uint32_t id, const char *message);
+  bool text(uint32_t id, const String &message);
+  bool text(uint32_t id, AsyncWebSocketMessageBuffer *buffer);
+  bool text(uint32_t id, AsyncWebSocketSharedBuffer buffer);
+
+  SendStatus textAll(const uint8_t *message, size_t len);
+  SendStatus textAll(const char *message, size_t len);
+  SendStatus textAll(const char *message);
+  SendStatus textAll(const String &message);
+  SendStatus textAll(AsyncWebSocketMessageBuffer *buffer);
+  SendStatus textAll(AsyncWebSocketSharedBuffer buffer);
+
+  bool binary(uint32_t id, const uint8_t *message, size_t len);
+  bool binary(uint32_t id, const char *message, size_t len);
+  bool binary(uint32_t id, const char *message);
+  bool binary(uint32_t id, const String &message);
+  bool binary(uint32_t id, AsyncWebSocketMessageBuffer *buffer);
+  bool binary(uint32_t id, AsyncWebSocketSharedBuffer buffer);
+
+  SendStatus binaryAll(const uint8_t *message, size_t len);
+  SendStatus binaryAll(const char *message, size_t len);
+  SendStatus binaryAll(const char *message);
+  SendStatus binaryAll(const String &message);
+  SendStatus binaryAll(AsyncWebSocketMessageBuffer *buffer);
+  SendStatus binaryAll(AsyncWebSocketSharedBuffer buffer);
+
+  size_t printf(uint32_t id, const char *format, ...) __attribute__((format(printf, 3, 4)));
+  size_t printfAll(const char *format, ...) __attribute__((format(printf, 2, 3)));
+
+#ifdef ESP8266
+  bool text(uint32_t id, const __FlashStringHelper *message);
+  SendStatus textAll(const __FlashStringHelper *message);
+  bool binary(uint32_t id, const __FlashStringHelper *message, size_t len);
+  SendStatus binaryAll(const __FlashStringHelper *message, size_t len);
+  size_t printf_P(uint32_t id, PGM_P formatP, ...) __attribute__((format(printf, 3, 4)));
+  size_t printfAll_P(PGM_P formatP, ...) __attribute__((format(printf, 2, 3)));
+#endif
+
+  void onEvent(AwsEventHandler handler) {
+    _eventHandler = handler;
+  }
+  void handleHandshake(AwsHandshakeHandler handler) {
+    _handshakeHandler = handler;
+  }
+
+  // system callbacks (do not call)
+  uint32_t _getNextId() {
+    return _cNextId++;
+  }
+  AsyncWebSocketClient *_newClient(AsyncWebServerRequest *request);
+  void _handleDisconnect(AsyncWebSocketClient *client);
+  void _handleEvent(AsyncWebSocketClient *client, AwsEventType type, void *arg, uint8_t *data, size_t len);
+  bool canHandle(AsyncWebServerRequest *request) const override final;
+  void handleRequest(AsyncWebServerRequest *request) override final;
+
+  //  messagebuffer functions/objects.
+  AsyncWebSocketMessageBuffer *makeBuffer(size_t size = 0);
+  AsyncWebSocketMessageBuffer *makeBuffer(const uint8_t *data, size_t size);
+
+  std::list<AsyncWebSocketClient> &getClients() {
+    return _clients;
+  }
+};
+
+// WebServer response to authenticate the socket and detach the tcp client from the web server request
+class AsyncWebSocketResponse : public AsyncWebServerResponse {
+private:
+  String _content;
+  AsyncWebSocket *_server;
+
+public:
+  AsyncWebSocketResponse(const String &key, AsyncWebSocket *server);
+  void _respond(AsyncWebServerRequest *request);
+  size_t _ack(AsyncWebServerRequest *request, size_t len, uint32_t time);
+  bool _sourceValid() const {
+    return true;
+  }
+};
+
+class AsyncWebSocketMessageHandler {
+public:
+  AwsEventHandler eventHandler() const {
+    return _handler;
+  }
+
+  void onConnect(std::function<void(AsyncWebSocket *server, AsyncWebSocketClient *client)> onConnect) {
+    _onConnect = onConnect;
+  }
+
+  void onDisconnect(std::function<void(AsyncWebSocket *server, uint32_t clientId)> onDisconnect) {
+    _onDisconnect = onDisconnect;
+  }
+
+  /**
+   * Error callback
+   * @param reason null-terminated string
+   * @param len length of the string
+   */
+  void onError(std::function<void(AsyncWebSocket *server, AsyncWebSocketClient *client, uint16_t errorCode, const char *reason, size_t len)> onError) {
+    _onError = onError;
+  }
+
+  /**
+   * Complete message callback
+   * @param data pointer to the data (binary or null-terminated string). This handler expects the user to know which data type he uses.
+   */
+  void onMessage(std::function<void(AsyncWebSocket *server, AsyncWebSocketClient *client, const uint8_t *data, size_t len)> onMessage) {
+    _onMessage = onMessage;
+  }
+
+  /**
+   * Fragmented message callback
+   * @param data pointer to the data (binary or null-terminated string), will be null-terminated. This handler expects the user to know which data type he uses.
+   */
+  // clang-format off
+  void onFragment(std::function<void(AsyncWebSocket *server, AsyncWebSocketClient *client, const AwsFrameInfo *frameInfo, const uint8_t *data, size_t len)> onFragment) {
+    _onFragment = onFragment;
+  }
+  // clang-format on
+
+private:
+  // clang-format off
+  std::function<void(AsyncWebSocket *server, AsyncWebSocketClient *client)> _onConnect;
+  std::function<void(AsyncWebSocket *server, AsyncWebSocketClient *client, uint16_t errorCode, const char *reason, size_t len)> _onError;
+  std::function<void(AsyncWebSocket *server, AsyncWebSocketClient *client, const uint8_t *data, size_t len)> _onMessage;
+  std::function<void(AsyncWebSocket *server, AsyncWebSocketClient *client, const AwsFrameInfo *frameInfo, const uint8_t *data, size_t len)> _onFragment;
+  std::function<void(AsyncWebSocket *server, uint32_t clientId)> _onDisconnect;
+  // clang-format on
+
+  // this handler is meant to only support 1-frame messages (== unfragmented messages)
+  AwsEventHandler _handler = [this](AsyncWebSocket *server, AsyncWebSocketClient *client, AwsEventType type, void *arg, uint8_t *data, size_t len) {
+    if (type == WS_EVT_CONNECT) {
+      if (_onConnect) {
+        _onConnect(server, client);
+      }
+    } else if (type == WS_EVT_DISCONNECT) {
+      if (_onDisconnect) {
+        _onDisconnect(server, client->id());
+      }
+    } else if (type == WS_EVT_ERROR) {
+      if (_onError) {
+        _onError(server, client, *((uint16_t *)arg), (const char *)data, len);
+      }
+    } else if (type == WS_EVT_DATA) {
+      AwsFrameInfo *info = (AwsFrameInfo *)arg;
+      if (info->opcode == WS_TEXT) {
+        data[len] = 0;
+      }
+      if (info->final && info->index == 0 && info->len == len) {
+        if (_onMessage) {
+          _onMessage(server, client, data, len);
+        }
+      } else {
+        if (_onFragment) {
+          _onFragment(server, client, info, data, len);
+        }
+      }
+    }
+  };
+};
+
+#endif /* ASYNCWEBSOCKET_H_ */

Raumtermostat/lib/ESPAsyncWebServer/src/BackPort_SHA1Builder.cpp

@@ -0,0 +1,284 @@
+/*
+ *  FIPS-180-1 compliant SHA-1 implementation
+ *
+ *  Copyright (C) 2006-2015, ARM Limited, All Rights Reserved
+ *  SPDX-License-Identifier: Apache-2.0
+ *
+ *  Licensed under the Apache License, Version 2.0 (the "License"); you may
+ *  not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ *  WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ *  See the License for the specific language governing permissions and
+ *  limitations under the License.
+ *
+ *  This file is part of mbed TLS (https://tls.mbed.org)
+ *  Modified for esp32 by Lucas Saavedra Vaz on 11 Jan 2024
+ */
+
+#include <Arduino.h>
+#if ESP_IDF_VERSION_MAJOR < 5
+
+#include "BackPort_SHA1Builder.h"
+
+// 32-bit integer manipulation macros (big endian)
+
+#ifndef GET_UINT32_BE
+#define GET_UINT32_BE(n, b, i) \
+  { (n) = ((uint32_t)(b)[(i)] << 24) | ((uint32_t)(b)[(i) + 1] << 16) | ((uint32_t)(b)[(i) + 2] << 8) | ((uint32_t)(b)[(i) + 3]); }
+#endif
+
+#ifndef PUT_UINT32_BE
+#define PUT_UINT32_BE(n, b, i)           \
+  {                                      \
+    (b)[(i)] = (uint8_t)((n) >> 24);     \
+    (b)[(i) + 1] = (uint8_t)((n) >> 16); \
+    (b)[(i) + 2] = (uint8_t)((n) >> 8);  \
+    (b)[(i) + 3] = (uint8_t)((n));       \
+  }
+#endif
+
+// Constants
+
+static const uint8_t sha1_padding[64] = {0x80, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+                                         0,    0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
+
+// Private methods
+
+void SHA1Builder::process(const uint8_t *data) {
+  uint32_t temp, W[16], A, B, C, D, E;
+
+  GET_UINT32_BE(W[0], data, 0);
+  GET_UINT32_BE(W[1], data, 4);
+  GET_UINT32_BE(W[2], data, 8);
+  GET_UINT32_BE(W[3], data, 12);
+  GET_UINT32_BE(W[4], data, 16);
+  GET_UINT32_BE(W[5], data, 20);
+  GET_UINT32_BE(W[6], data, 24);
+  GET_UINT32_BE(W[7], data, 28);
+  GET_UINT32_BE(W[8], data, 32);
+  GET_UINT32_BE(W[9], data, 36);
+  GET_UINT32_BE(W[10], data, 40);
+  GET_UINT32_BE(W[11], data, 44);
+  GET_UINT32_BE(W[12], data, 48);
+  GET_UINT32_BE(W[13], data, 52);
+  GET_UINT32_BE(W[14], data, 56);
+  GET_UINT32_BE(W[15], data, 60);
+
+#define sha1_S(x, n) ((x << n) | ((x & 0xFFFFFFFF) >> (32 - n)))
+
+#define sha1_R(t) (temp = W[(t - 3) & 0x0F] ^ W[(t - 8) & 0x0F] ^ W[(t - 14) & 0x0F] ^ W[t & 0x0F], (W[t & 0x0F] = sha1_S(temp, 1)))
+
+#define sha1_P(a, b, c, d, e, x)                      \
+  {                                                   \
+    e += sha1_S(a, 5) + sha1_F(b, c, d) + sha1_K + x; \
+    b = sha1_S(b, 30);                                \
+  }
+
+  A = state[0];
+  B = state[1];
+  C = state[2];
+  D = state[3];
+  E = state[4];
+
+#define sha1_F(x, y, z) (z ^ (x & (y ^ z)))
+#define sha1_K          0x5A827999
+
+  sha1_P(A, B, C, D, E, W[0]);
+  sha1_P(E, A, B, C, D, W[1]);
+  sha1_P(D, E, A, B, C, W[2]);
+  sha1_P(C, D, E, A, B, W[3]);
+  sha1_P(B, C, D, E, A, W[4]);
+  sha1_P(A, B, C, D, E, W[5]);
+  sha1_P(E, A, B, C, D, W[6]);
+  sha1_P(D, E, A, B, C, W[7]);
+  sha1_P(C, D, E, A, B, W[8]);
+  sha1_P(B, C, D, E, A, W[9]);
+  sha1_P(A, B, C, D, E, W[10]);
+  sha1_P(E, A, B, C, D, W[11]);
+  sha1_P(D, E, A, B, C, W[12]);
+  sha1_P(C, D, E, A, B, W[13]);
+  sha1_P(B, C, D, E, A, W[14]);
+  sha1_P(A, B, C, D, E, W[15]);
+  sha1_P(E, A, B, C, D, sha1_R(16));
+  sha1_P(D, E, A, B, C, sha1_R(17));
+  sha1_P(C, D, E, A, B, sha1_R(18));
+  sha1_P(B, C, D, E, A, sha1_R(19));
+
+#undef sha1_K
+#undef sha1_F
+
+#define sha1_F(x, y, z) (x ^ y ^ z)
+#define sha1_K          0x6ED9EBA1
+
+  sha1_P(A, B, C, D, E, sha1_R(20));
+  sha1_P(E, A, B, C, D, sha1_R(21));
+  sha1_P(D, E, A, B, C, sha1_R(22));
+  sha1_P(C, D, E, A, B, sha1_R(23));
+  sha1_P(B, C, D, E, A, sha1_R(24));
+  sha1_P(A, B, C, D, E, sha1_R(25));
+  sha1_P(E, A, B, C, D, sha1_R(26));
+  sha1_P(D, E, A, B, C, sha1_R(27));
+  sha1_P(C, D, E, A, B, sha1_R(28));
+  sha1_P(B, C, D, E, A, sha1_R(29));
+  sha1_P(A, B, C, D, E, sha1_R(30));
+  sha1_P(E, A, B, C, D, sha1_R(31));
+  sha1_P(D, E, A, B, C, sha1_R(32));
+  sha1_P(C, D, E, A, B, sha1_R(33));
+  sha1_P(B, C, D, E, A, sha1_R(34));
+  sha1_P(A, B, C, D, E, sha1_R(35));
+  sha1_P(E, A, B, C, D, sha1_R(36));
+  sha1_P(D, E, A, B, C, sha1_R(37));
+  sha1_P(C, D, E, A, B, sha1_R(38));
+  sha1_P(B, C, D, E, A, sha1_R(39));
+
+#undef sha1_K
+#undef sha1_F
+
+#define sha1_F(x, y, z) ((x & y) | (z & (x | y)))
+#define sha1_K          0x8F1BBCDC
+
+  sha1_P(A, B, C, D, E, sha1_R(40));
+  sha1_P(E, A, B, C, D, sha1_R(41));
+  sha1_P(D, E, A, B, C, sha1_R(42));
+  sha1_P(C, D, E, A, B, sha1_R(43));
+  sha1_P(B, C, D, E, A, sha1_R(44));
+  sha1_P(A, B, C, D, E, sha1_R(45));
+  sha1_P(E, A, B, C, D, sha1_R(46));
+  sha1_P(D, E, A, B, C, sha1_R(47));
+  sha1_P(C, D, E, A, B, sha1_R(48));
+  sha1_P(B, C, D, E, A, sha1_R(49));
+  sha1_P(A, B, C, D, E, sha1_R(50));
+  sha1_P(E, A, B, C, D, sha1_R(51));
+  sha1_P(D, E, A, B, C, sha1_R(52));
+  sha1_P(C, D, E, A, B, sha1_R(53));
+  sha1_P(B, C, D, E, A, sha1_R(54));
+  sha1_P(A, B, C, D, E, sha1_R(55));
+  sha1_P(E, A, B, C, D, sha1_R(56));
+  sha1_P(D, E, A, B, C, sha1_R(57));
+  sha1_P(C, D, E, A, B, sha1_R(58));
+  sha1_P(B, C, D, E, A, sha1_R(59));
+
+#undef sha1_K
+#undef sha1_F
+
+#define sha1_F(x, y, z) (x ^ y ^ z)
+#define sha1_K          0xCA62C1D6
+
+  sha1_P(A, B, C, D, E, sha1_R(60));
+  sha1_P(E, A, B, C, D, sha1_R(61));
+  sha1_P(D, E, A, B, C, sha1_R(62));
+  sha1_P(C, D, E, A, B, sha1_R(63));
+  sha1_P(B, C, D, E, A, sha1_R(64));
+  sha1_P(A, B, C, D, E, sha1_R(65));
+  sha1_P(E, A, B, C, D, sha1_R(66));
+  sha1_P(D, E, A, B, C, sha1_R(67));
+  sha1_P(C, D, E, A, B, sha1_R(68));
+  sha1_P(B, C, D, E, A, sha1_R(69));
+  sha1_P(A, B, C, D, E, sha1_R(70));
+  sha1_P(E, A, B, C, D, sha1_R(71));
+  sha1_P(D, E, A, B, C, sha1_R(72));
+  sha1_P(C, D, E, A, B, sha1_R(73));
+  sha1_P(B, C, D, E, A, sha1_R(74));
+  sha1_P(A, B, C, D, E, sha1_R(75));
+  sha1_P(E, A, B, C, D, sha1_R(76));
+  sha1_P(D, E, A, B, C, sha1_R(77));
+  sha1_P(C, D, E, A, B, sha1_R(78));
+  sha1_P(B, C, D, E, A, sha1_R(79));
+
+#undef sha1_K
+#undef sha1_F
+
+  state[0] += A;
+  state[1] += B;
+  state[2] += C;
+  state[3] += D;
+  state[4] += E;
+}
+
+// Public methods
+
+void SHA1Builder::begin() {
+  total[0] = 0;
+  total[1] = 0;
+
+  state[0] = 0x67452301;
+  state[1] = 0xEFCDAB89;
+  state[2] = 0x98BADCFE;
+  state[3] = 0x10325476;
+  state[4] = 0xC3D2E1F0;
+
+  memset(buffer, 0x00, sizeof(buffer));
+  memset(hash, 0x00, sizeof(hash));
+}
+
+void SHA1Builder::add(const uint8_t *data, size_t len) {
+  size_t fill;
+  uint32_t left;
+
+  if (len == 0) {
+    return;
+  }
+
+  left = total[0] & 0x3F;
+  fill = 64 - left;
+
+  total[0] += (uint32_t)len;
+  total[0] &= 0xFFFFFFFF;
+
+  if (total[0] < (uint32_t)len) {
+    total[1]++;
+  }
+
+  if (left && len >= fill) {
+    memcpy((void *)(buffer + left), data, fill);
+    process(buffer);
+    data += fill;
+    len -= fill;
+    left = 0;
+  }
+
+  while (len >= 64) {
+    process(data);
+    data += 64;
+    len -= 64;
+  }
+
+  if (len > 0) {
+    memcpy((void *)(buffer + left), data, len);
+  }
+}
+
+void SHA1Builder::calculate(void) {
+  uint32_t last, padn;
+  uint32_t high, low;
+  uint8_t msglen[8];
+
+  high = (total[0] >> 29) | (total[1] << 3);
+  low = (total[0] << 3);
+
+  PUT_UINT32_BE(high, msglen, 0);
+  PUT_UINT32_BE(low, msglen, 4);
+
+  last = total[0] & 0x3F;
+  padn = (last < 56) ? (56 - last) : (120 - last);
+
+  add((uint8_t *)sha1_padding, padn);
+  add(msglen, 8);
+
+  PUT_UINT32_BE(state[0], hash, 0);
+  PUT_UINT32_BE(state[1], hash, 4);
+  PUT_UINT32_BE(state[2], hash, 8);
+  PUT_UINT32_BE(state[3], hash, 12);
+  PUT_UINT32_BE(state[4], hash, 16);
+}
+
+void SHA1Builder::getBytes(uint8_t *output) {
+  memcpy(output, hash, SHA1_HASH_SIZE);
+}
+
+#endif  // ESP_IDF_VERSION_MAJOR < 5

Raumtermostat/lib/ESPAsyncWebServer/src/BackPort_SHA1Builder.h

@@ -0,0 +1,44 @@
+// Copyright 2024 Espressif Systems (Shanghai) PTE LTD
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <Arduino.h>
+#if ESP_IDF_VERSION_MAJOR < 5
+
+#ifndef SHA1Builder_h
+#define SHA1Builder_h
+
+#include <Stream.h>
+#include <WString.h>
+
+#define SHA1_HASH_SIZE 20
+
+class SHA1Builder {
+private:
+  uint32_t total[2];            /* number of bytes processed  */
+  uint32_t state[5];            /* intermediate digest state  */
+  unsigned char buffer[64];     /* data block being processed */
+  uint8_t hash[SHA1_HASH_SIZE]; /* SHA-1 result               */
+
+  void process(const uint8_t *data);
+
+public:
+  void begin();
+  void add(const uint8_t *data, size_t len);
+  void calculate();
+  void getBytes(uint8_t *output);
+};
+
+#endif  // SHA1Builder_h
+
+#endif  // ESP_IDF_VERSION_MAJOR < 5

Raumtermostat/lib/ESPAsyncWebServer/src/ChunkPrint.cpp

@@ -0,0 +1,18 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+#include <ChunkPrint.h>
+
+ChunkPrint::ChunkPrint(uint8_t *destination, size_t from, size_t len) : _destination(destination), _to_skip(from), _to_write(len), _pos{0} {}
+
+size_t ChunkPrint::write(uint8_t c) {
+  if (_to_skip > 0) {
+    _to_skip--;
+    return 1;
+  } else if (_to_write > 0) {
+    _to_write--;
+    _destination[_pos++] = c;
+    return 1;
+  }
+  return 0;
+}

Raumtermostat/lib/ESPAsyncWebServer/src/ChunkPrint.h

@@ -0,0 +1,23 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+#ifndef CHUNKPRINT_H
+#define CHUNKPRINT_H
+
+#include <Print.h>
+
+class ChunkPrint : public Print {
+private:
+  uint8_t *_destination;
+  size_t _to_skip;
+  size_t _to_write;
+  size_t _pos;
+
+public:
+  ChunkPrint(uint8_t *destination, size_t from, size_t len);
+  size_t write(uint8_t c);
+  size_t write(const uint8_t *buffer, size_t size) {
+    return this->Print::write(buffer, size);
+  }
+};
+#endif

Raumtermostat/lib/ESPAsyncWebServer/src/Middleware.cpp

@@ -0,0 +1,287 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+#include "WebAuthentication.h"
+#include <ESPAsyncWebServer.h>
+
+AsyncMiddlewareChain::~AsyncMiddlewareChain() {
+  for (AsyncMiddleware *m : _middlewares) {
+    if (m->_freeOnRemoval) {
+      delete m;
+    }
+  }
+}
+
+void AsyncMiddlewareChain::addMiddleware(ArMiddlewareCallback fn) {
+  AsyncMiddlewareFunction *m = new AsyncMiddlewareFunction(fn);
+  m->_freeOnRemoval = true;
+  _middlewares.emplace_back(m);
+}
+
+void AsyncMiddlewareChain::addMiddleware(AsyncMiddleware *middleware) {
+  if (middleware) {
+    _middlewares.emplace_back(middleware);
+  }
+}
+
+void AsyncMiddlewareChain::addMiddlewares(std::vector<AsyncMiddleware *> middlewares) {
+  for (AsyncMiddleware *m : middlewares) {
+    addMiddleware(m);
+  }
+}
+
+bool AsyncMiddlewareChain::removeMiddleware(AsyncMiddleware *middleware) {
+  // remove all middlewares from _middlewares vector being equal to middleware, delete them having _freeOnRemoval flag to true and resize the vector.
+  const size_t size = _middlewares.size();
+  _middlewares.erase(
+    std::remove_if(
+      _middlewares.begin(), _middlewares.end(),
+      [middleware](AsyncMiddleware *m) {
+        if (m == middleware) {
+          if (m->_freeOnRemoval) {
+            delete m;
+          }
+          return true;
+        }
+        return false;
+      }
+    ),
+    _middlewares.end()
+  );
+  return size != _middlewares.size();
+}
+
+void AsyncMiddlewareChain::_runChain(AsyncWebServerRequest *request, ArMiddlewareNext finalizer) {
+  if (!_middlewares.size()) {
+    return finalizer();
+  }
+  ArMiddlewareNext next;
+  std::list<AsyncMiddleware *>::iterator it = _middlewares.begin();
+  next = [this, &next, &it, request, finalizer]() {
+    if (it == _middlewares.end()) {
+      return finalizer();
+    }
+    AsyncMiddleware *m = *it;
+    it++;
+    return m->run(request, next);
+  };
+  return next();
+}
+
+void AsyncAuthenticationMiddleware::setUsername(const char *username) {
+  _username = username;
+  _hasCreds = _username.length() && _credentials.length();
+}
+
+void AsyncAuthenticationMiddleware::setPassword(const char *password) {
+  _credentials = password;
+  _hash = false;
+  _hasCreds = _username.length() && _credentials.length();
+}
+
+void AsyncAuthenticationMiddleware::setPasswordHash(const char *hash) {
+  _credentials = hash;
+  _hash = _credentials.length();
+  _hasCreds = _username.length() && _credentials.length();
+}
+
+bool AsyncAuthenticationMiddleware::generateHash() {
+  // ensure we have all the necessary data
+  if (!_hasCreds) {
+    return false;
+  }
+
+  // if we already have a hash, do nothing
+  if (_hash) {
+    return false;
+  }
+
+  switch (_authMethod) {
+    case AsyncAuthType::AUTH_DIGEST:
+      _credentials = generateDigestHash(_username.c_str(), _credentials.c_str(), _realm.c_str());
+      if (_credentials.length()) {
+        _hash = true;
+        return true;
+      } else {
+        return false;
+      }
+
+    case AsyncAuthType::AUTH_BASIC:
+      _credentials = generateBasicHash(_username.c_str(), _credentials.c_str());
+      if (_credentials.length()) {
+        _hash = true;
+        return true;
+      } else {
+        return false;
+      }
+
+    default: return false;
+  }
+}
+
+bool AsyncAuthenticationMiddleware::allowed(AsyncWebServerRequest *request) const {
+  if (_authMethod == AsyncAuthType::AUTH_NONE) {
+    return true;
+  }
+
+  if (_authMethod == AsyncAuthType::AUTH_DENIED) {
+    return false;
+  }
+
+  if (!_hasCreds) {
+    return true;
+  }
+
+  return request->authenticate(_username.c_str(), _credentials.c_str(), _realm.c_str(), _hash);
+}
+
+void AsyncAuthenticationMiddleware::run(AsyncWebServerRequest *request, ArMiddlewareNext next) {
+  return allowed(request) ? next() : request->requestAuthentication(_authMethod, _realm.c_str(), _authFailMsg.c_str());
+}
+
+void AsyncHeaderFreeMiddleware::run(AsyncWebServerRequest *request, ArMiddlewareNext next) {
+  std::list<const char *> toRemove;
+  for (auto &h : request->getHeaders()) {
+    bool keep = false;
+    for (const char *k : _toKeep) {
+      if (strcasecmp(h.name().c_str(), k) == 0) {
+        keep = true;
+        break;
+      }
+    }
+    if (!keep) {
+      toRemove.push_back(h.name().c_str());
+    }
+  }
+  for (const char *h : toRemove) {
+    request->removeHeader(h);
+  }
+  next();
+}
+
+void AsyncHeaderFilterMiddleware::run(AsyncWebServerRequest *request, ArMiddlewareNext next) {
+  for (auto it = _toRemove.begin(); it != _toRemove.end(); ++it) {
+    request->removeHeader(*it);
+  }
+  next();
+}
+
+void AsyncLoggingMiddleware::run(AsyncWebServerRequest *request, ArMiddlewareNext next) {
+  if (!isEnabled()) {
+    next();
+    return;
+  }
+  _out->print(F("* Connection from "));
+  _out->print(request->client()->remoteIP().toString());
+  _out->print(':');
+  _out->println(request->client()->remotePort());
+  _out->print('>');
+  _out->print(' ');
+  _out->print(request->methodToString());
+  _out->print(' ');
+  _out->print(request->url().c_str());
+  _out->print(F(" HTTP/1."));
+  _out->println(request->version());
+  for (auto &h : request->getHeaders()) {
+    if (h.value().length()) {
+      _out->print('>');
+      _out->print(' ');
+      _out->print(h.name());
+      _out->print(':');
+      _out->print(' ');
+      _out->println(h.value());
+    }
+  }
+  _out->println(F(">"));
+  uint32_t elapsed = millis();
+  next();
+  elapsed = millis() - elapsed;
+  AsyncWebServerResponse *response = request->getResponse();
+  if (response) {
+    _out->print(F("* Processed in "));
+    _out->print(elapsed);
+    _out->println(F(" ms"));
+    _out->print('<');
+    _out->print(F(" HTTP/1."));
+    _out->print(request->version());
+    _out->print(' ');
+    _out->print(response->code());
+    _out->print(' ');
+    _out->println(AsyncWebServerResponse::responseCodeToString(response->code()));
+    for (auto &h : response->getHeaders()) {
+      if (h.value().length()) {
+        _out->print('<');
+        _out->print(' ');
+        _out->print(h.name());
+        _out->print(':');
+        _out->print(' ');
+        _out->println(h.value());
+      }
+    }
+    _out->println('<');
+  } else {
+    _out->println(F("* Connection closed!"));
+  }
+}
+
+void AsyncCorsMiddleware::addCORSHeaders(AsyncWebServerResponse *response) {
+  response->addHeader(asyncsrv::T_CORS_ACAO, _origin.c_str());
+  response->addHeader(asyncsrv::T_CORS_ACAM, _methods.c_str());
+  response->addHeader(asyncsrv::T_CORS_ACAH, _headers.c_str());
+  response->addHeader(asyncsrv::T_CORS_ACAC, _credentials ? asyncsrv::T_TRUE : asyncsrv::T_FALSE);
+  response->addHeader(asyncsrv::T_CORS_ACMA, String(_maxAge).c_str());
+}
+
+void AsyncCorsMiddleware::run(AsyncWebServerRequest *request, ArMiddlewareNext next) {
+  // Origin header ? => CORS handling
+  if (request->hasHeader(asyncsrv::T_CORS_O)) {
+    // check if this is a preflight request => handle it and return
+    if (request->method() == HTTP_OPTIONS) {
+      AsyncWebServerResponse *response = request->beginResponse(200);
+      addCORSHeaders(response);
+      request->send(response);
+      return;
+    }
+
+    // CORS request, no options => let the request pass and add CORS headers after
+    next();
+    AsyncWebServerResponse *response = request->getResponse();
+    if (response) {
+      addCORSHeaders(response);
+    }
+
+  } else {
+    // NO Origin header => no CORS handling
+    next();
+  }
+}
+
+bool AsyncRateLimitMiddleware::isRequestAllowed(uint32_t &retryAfterSeconds) {
+  uint32_t now = millis();
+
+  while (!_requestTimes.empty() && _requestTimes.front() <= now - _windowSizeMillis) {
+    _requestTimes.pop_front();
+  }
+
+  _requestTimes.push_back(now);
+
+  if (_requestTimes.size() > _maxRequests) {
+    _requestTimes.pop_front();
+    retryAfterSeconds = (_windowSizeMillis - (now - _requestTimes.front())) / 1000 + 1;
+    return false;
+  }
+
+  retryAfterSeconds = 0;
+  return true;
+}
+
+void AsyncRateLimitMiddleware::run(AsyncWebServerRequest *request, ArMiddlewareNext next) {
+  uint32_t retryAfterSeconds;
+  if (isRequestAllowed(retryAfterSeconds)) {
+    next();
+  } else {
+    AsyncWebServerResponse *response = request->beginResponse(429);
+    response->addHeader(asyncsrv::T_retry_after, retryAfterSeconds);
+    request->send(response);
+  }
+}

Raumtermostat/lib/ESPAsyncWebServer/src/WebAuthentication.cpp

@@ -0,0 +1,247 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+#include "WebAuthentication.h"
+#include <libb64/cencode.h>
+#if defined(ESP32) || defined(TARGET_RP2040) || defined(TARGET_RP2350) || defined(PICO_RP2040) || defined(PICO_RP2350)
+#include <MD5Builder.h>
+#else
+#include "md5.h"
+#endif
+#include "literals.h"
+
+using namespace asyncsrv;
+
+// Basic Auth hash = base64("username:password")
+
+bool checkBasicAuthentication(const char *hash, const char *username, const char *password) {
+  if (username == NULL || password == NULL || hash == NULL) {
+    return false;
+  }
+  return generateBasicHash(username, password).equalsIgnoreCase(hash);
+}
+
+String generateBasicHash(const char *username, const char *password) {
+  if (username == NULL || password == NULL) {
+    return emptyString;
+  }
+
+  size_t toencodeLen = strlen(username) + strlen(password) + 1;
+
+  char *toencode = new char[toencodeLen + 1];
+  if (toencode == NULL) {
+    return emptyString;
+  }
+  char *encoded = new char[base64_encode_expected_len(toencodeLen) + 1];
+  if (encoded == NULL) {
+    delete[] toencode;
+    return emptyString;
+  }
+  sprintf_P(toencode, PSTR("%s:%s"), username, password);
+  if (base64_encode_chars(toencode, toencodeLen, encoded) > 0) {
+    String res = String(encoded);
+    delete[] toencode;
+    delete[] encoded;
+    return res;
+  }
+  delete[] toencode;
+  delete[] encoded;
+  return emptyString;
+}
+
+static bool getMD5(uint8_t *data, uint16_t len, char *output) {  // 33 bytes or more
+#if defined(ESP32) || defined(TARGET_RP2040) || defined(TARGET_RP2350) || defined(PICO_RP2040) || defined(PICO_RP2350)
+  MD5Builder md5;
+  md5.begin();
+  md5.add(data, len);
+  md5.calculate();
+  md5.getChars(output);
+#else
+  md5_context_t _ctx;
+
+  uint8_t *_buf = (uint8_t *)malloc(16);
+  if (_buf == NULL) {
+    return false;
+  }
+  memset(_buf, 0x00, 16);
+
+  MD5Init(&_ctx);
+  MD5Update(&_ctx, data, len);
+  MD5Final(_buf, &_ctx);
+
+  for (uint8_t i = 0; i < 16; i++) {
+    sprintf_P(output + (i * 2), PSTR("%02x"), _buf[i]);
+  }
+
+  free(_buf);
+#endif
+  return true;
+}
+
+String genRandomMD5() {
+#ifdef ESP8266
+  uint32_t r = RANDOM_REG32;
+#else
+  uint32_t r = rand();
+#endif
+  char *out = (char *)malloc(33);
+  if (out == NULL || !getMD5((uint8_t *)(&r), 4, out)) {
+#ifdef ESP32
+    log_e("Failed to allocate");
+#endif
+    return emptyString;
+  }
+  String res = String(out);
+  free(out);
+  return res;
+}
+
+static String stringMD5(const String &in) {
+  char *out = (char *)malloc(33);
+  if (out == NULL || !getMD5((uint8_t *)(in.c_str()), in.length(), out)) {
+#ifdef ESP32
+    log_e("Failed to allocate");
+#endif
+    return emptyString;
+  }
+  String res = String(out);
+  free(out);
+  return res;
+}
+
+String generateDigestHash(const char *username, const char *password, const char *realm) {
+  if (username == NULL || password == NULL || realm == NULL) {
+    return emptyString;
+  }
+  char *out = (char *)malloc(33);
+  if (out == NULL) {
+#ifdef ESP32
+    log_e("Failed to allocate");
+#endif
+    return emptyString;
+  }
+
+  String in;
+  if (!in.reserve(strlen(username) + strlen(realm) + strlen(password) + 2)) {
+#ifdef ESP32
+    log_e("Failed to allocate");
+#endif
+    free(out);
+    return emptyString;
+  }
+
+  in.concat(username);
+  in.concat(':');
+  in.concat(realm);
+  in.concat(':');
+  in.concat(password);
+
+  if (!getMD5((uint8_t *)(in.c_str()), in.length(), out)) {
+#ifdef ESP32
+    log_e("Failed to allocate");
+#endif
+    free(out);
+    return emptyString;
+  }
+
+  in = String(out);
+  free(out);
+  return in;
+}
+
+bool checkDigestAuthentication(
+  const char *header, const char *method, const char *username, const char *password, const char *realm, bool passwordIsHash, const char *nonce,
+  const char *opaque, const char *uri
+) {
+  if (username == NULL || password == NULL || header == NULL || method == NULL) {
+    // os_printf("AUTH FAIL: missing required fields\n");
+    return false;
+  }
+
+  String myHeader(header);
+  int nextBreak = myHeader.indexOf(',');
+  if (nextBreak < 0) {
+    // os_printf("AUTH FAIL: no variables\n");
+    return false;
+  }
+
+  String myUsername;
+  String myRealm;
+  String myNonce;
+  String myUri;
+  String myResponse;
+  String myQop;
+  String myNc;
+  String myCnonce;
+
+  myHeader += (char)0x2c;  // ','
+  myHeader += (char)0x20;  // ' '
+  do {
+    String avLine(myHeader.substring(0, nextBreak));
+    avLine.trim();
+    myHeader = myHeader.substring(nextBreak + 1);
+    nextBreak = myHeader.indexOf(',');
+
+    int eqSign = avLine.indexOf('=');
+    if (eqSign < 0) {
+      // os_printf("AUTH FAIL: no = sign\n");
+      return false;
+    }
+    String varName(avLine.substring(0, eqSign));
+    avLine = avLine.substring(eqSign + 1);
+    if (avLine.startsWith(String('"'))) {
+      avLine = avLine.substring(1, avLine.length() - 1);
+    }
+
+    if (varName.equals(T_username)) {
+      if (!avLine.equals(username)) {
+        // os_printf("AUTH FAIL: username\n");
+        return false;
+      }
+      myUsername = avLine;
+    } else if (varName.equals(T_realm)) {
+      if (realm != NULL && !avLine.equals(realm)) {
+        // os_printf("AUTH FAIL: realm\n");
+        return false;
+      }
+      myRealm = avLine;
+    } else if (varName.equals(T_nonce)) {
+      if (nonce != NULL && !avLine.equals(nonce)) {
+        // os_printf("AUTH FAIL: nonce\n");
+        return false;
+      }
+      myNonce = avLine;
+    } else if (varName.equals(T_opaque)) {
+      if (opaque != NULL && !avLine.equals(opaque)) {
+        // os_printf("AUTH FAIL: opaque\n");
+        return false;
+      }
+    } else if (varName.equals(T_uri)) {
+      if (uri != NULL && !avLine.equals(uri)) {
+        // os_printf("AUTH FAIL: uri\n");
+        return false;
+      }
+      myUri = avLine;
+    } else if (varName.equals(T_response)) {
+      myResponse = avLine;
+    } else if (varName.equals(T_qop)) {
+      myQop = avLine;
+    } else if (varName.equals(T_nc)) {
+      myNc = avLine;
+    } else if (varName.equals(T_cnonce)) {
+      myCnonce = avLine;
+    }
+  } while (nextBreak > 0);
+
+  String ha1 = passwordIsHash ? password : stringMD5(myUsername + ':' + myRealm + ':' + password).c_str();
+  String ha2 = stringMD5(String(method) + ':' + myUri);
+  String response = ha1 + ':' + myNonce + ':' + myNc + ':' + myCnonce + ':' + myQop + ':' + ha2;
+
+  if (myResponse.equals(stringMD5(response))) {
+    // os_printf("AUTH SUCCESS\n");
+    return true;
+  }
+
+  // os_printf("AUTH FAIL: password\n");
+  return false;
+}

Raumtermostat/lib/ESPAsyncWebServer/src/WebAuthentication.h

@@ -0,0 +1,23 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+#ifndef WEB_AUTHENTICATION_H_
+#define WEB_AUTHENTICATION_H_
+
+#include "Arduino.h"
+
+bool checkBasicAuthentication(const char *header, const char *username, const char *password);
+
+bool checkDigestAuthentication(
+  const char *header, const char *method, const char *username, const char *password, const char *realm, bool passwordIsHash, const char *nonce,
+  const char *opaque, const char *uri
+);
+
+// for storing hashed versions on the device that can be authenticated against
+String generateDigestHash(const char *username, const char *password, const char *realm);
+
+String generateBasicHash(const char *username, const char *password);
+
+String genRandomMD5();
+
+#endif

Raumtermostat/lib/ESPAsyncWebServer/src/WebHandlerImpl.h

@@ -0,0 +1,93 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+#ifndef ASYNCWEBSERVERHANDLERIMPL_H_
+#define ASYNCWEBSERVERHANDLERIMPL_H_
+
+#include <string>
+#ifdef ASYNCWEBSERVER_REGEX
+#include <regex>
+#endif
+
+#include "stddef.h"
+#include <time.h>
+
+class AsyncStaticWebHandler : public AsyncWebHandler {
+  using File = fs::File;
+  using FS = fs::FS;
+
+private:
+  bool _getFile(AsyncWebServerRequest *request) const;
+  bool _searchFile(AsyncWebServerRequest *request, const String &path);
+
+protected:
+  FS _fs;
+  String _uri;
+  String _path;
+  String _default_file;
+  String _cache_control;
+  String _last_modified;
+  AwsTemplateProcessor _callback;
+  bool _isDir;
+  bool _tryGzipFirst = true;
+
+public:
+  AsyncStaticWebHandler(const char *uri, FS &fs, const char *path, const char *cache_control);
+  bool canHandle(AsyncWebServerRequest *request) const override final;
+  void handleRequest(AsyncWebServerRequest *request) override final;
+  AsyncStaticWebHandler &setTryGzipFirst(bool value);
+  AsyncStaticWebHandler &setIsDir(bool isDir);
+  AsyncStaticWebHandler &setDefaultFile(const char *filename);
+  AsyncStaticWebHandler &setCacheControl(const char *cache_control);
+
+  /**
+     * @brief Set the Last-Modified time for the object
+     *
+     * @param last_modified
+     * @return AsyncStaticWebHandler&
+     */
+  AsyncStaticWebHandler &setLastModified(const char *last_modified);
+  AsyncStaticWebHandler &setLastModified(struct tm *last_modified);
+  AsyncStaticWebHandler &setLastModified(time_t last_modified);
+  // sets to current time. Make sure sntp is running and time is updated
+  AsyncStaticWebHandler &setLastModified();
+
+  AsyncStaticWebHandler &setTemplateProcessor(AwsTemplateProcessor newCallback);
+};
+
+class AsyncCallbackWebHandler : public AsyncWebHandler {
+private:
+protected:
+  String _uri;
+  WebRequestMethodComposite _method;
+  ArRequestHandlerFunction _onRequest;
+  ArUploadHandlerFunction _onUpload;
+  ArBodyHandlerFunction _onBody;
+  bool _isRegex;
+
+public:
+  AsyncCallbackWebHandler() : _uri(), _method(HTTP_ANY), _onRequest(NULL), _onUpload(NULL), _onBody(NULL), _isRegex(false) {}
+  void setUri(const String &uri);
+  void setMethod(WebRequestMethodComposite method) {
+    _method = method;
+  }
+  void onRequest(ArRequestHandlerFunction fn) {
+    _onRequest = fn;
+  }
+  void onUpload(ArUploadHandlerFunction fn) {
+    _onUpload = fn;
+  }
+  void onBody(ArBodyHandlerFunction fn) {
+    _onBody = fn;
+  }
+
+  bool canHandle(AsyncWebServerRequest *request) const override final;
+  void handleRequest(AsyncWebServerRequest *request) override final;
+  void handleUpload(AsyncWebServerRequest *request, const String &filename, size_t index, uint8_t *data, size_t len, bool final) override final;
+  void handleBody(AsyncWebServerRequest *request, uint8_t *data, size_t len, size_t index, size_t total) override final;
+  bool isRequestHandlerTrivial() const override final {
+    return !_onRequest;
+  }
+};
+
+#endif /* ASYNCWEBSERVERHANDLERIMPL_H_ */

Raumtermostat/lib/ESPAsyncWebServer/src/WebHandlers.cpp

@@ -0,0 +1,326 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+#include "ESPAsyncWebServer.h"
+#include "WebHandlerImpl.h"
+
+using namespace asyncsrv;
+
+AsyncWebHandler &AsyncWebHandler::setFilter(ArRequestFilterFunction fn) {
+  _filter = fn;
+  return *this;
+}
+AsyncWebHandler &AsyncWebHandler::setAuthentication(const char *username, const char *password, AsyncAuthType authMethod) {
+  if (!_authMiddleware) {
+    _authMiddleware = new AsyncAuthenticationMiddleware();
+    _authMiddleware->_freeOnRemoval = true;
+    addMiddleware(_authMiddleware);
+  }
+  _authMiddleware->setUsername(username);
+  _authMiddleware->setPassword(password);
+  _authMiddleware->setAuthType(authMethod);
+  return *this;
+};
+
+AsyncStaticWebHandler::AsyncStaticWebHandler(const char *uri, FS &fs, const char *path, const char *cache_control)
+  : _fs(fs), _uri(uri), _path(path), _default_file(F("index.htm")), _cache_control(cache_control), _last_modified(), _callback(nullptr) {
+  // Ensure leading '/'
+  if (_uri.length() == 0 || _uri[0] != '/') {
+    _uri = String('/') + _uri;
+  }
+  if (_path.length() == 0 || _path[0] != '/') {
+    _path = String('/') + _path;
+  }
+
+  // If path ends with '/' we assume a hint that this is a directory to improve performance.
+  // However - if it does not end with '/' we, can't assume a file, path can still be a directory.
+  _isDir = _path[_path.length() - 1] == '/';
+
+  // Remove the trailing '/' so we can handle default file
+  // Notice that root will be "" not "/"
+  if (_uri[_uri.length() - 1] == '/') {
+    _uri = _uri.substring(0, _uri.length() - 1);
+  }
+  if (_path[_path.length() - 1] == '/') {
+    _path = _path.substring(0, _path.length() - 1);
+  }
+}
+
+AsyncStaticWebHandler &AsyncStaticWebHandler::setTryGzipFirst(bool value) {
+  _tryGzipFirst = value;
+  return *this;
+}
+
+AsyncStaticWebHandler &AsyncStaticWebHandler::setIsDir(bool isDir) {
+  _isDir = isDir;
+  return *this;
+}
+
+AsyncStaticWebHandler &AsyncStaticWebHandler::setDefaultFile(const char *filename) {
+  _default_file = filename;
+  return *this;
+}
+
+AsyncStaticWebHandler &AsyncStaticWebHandler::setCacheControl(const char *cache_control) {
+  _cache_control = cache_control;
+  return *this;
+}
+
+AsyncStaticWebHandler &AsyncStaticWebHandler::setLastModified(const char *last_modified) {
+  _last_modified = last_modified;
+  return *this;
+}
+
+AsyncStaticWebHandler &AsyncStaticWebHandler::setLastModified(struct tm *last_modified) {
+  char result[30];
+#ifdef ESP8266
+  auto formatP = PSTR("%a, %d %b %Y %H:%M:%S GMT");
+  char format[strlen_P(formatP) + 1];
+  strcpy_P(format, formatP);
+#else
+  static constexpr const char *format = "%a, %d %b %Y %H:%M:%S GMT";
+#endif
+
+  strftime(result, sizeof(result), format, last_modified);
+  _last_modified = result;
+  return *this;
+}
+
+AsyncStaticWebHandler &AsyncStaticWebHandler::setLastModified(time_t last_modified) {
+  return setLastModified((struct tm *)gmtime(&last_modified));
+}
+
+AsyncStaticWebHandler &AsyncStaticWebHandler::setLastModified() {
+  time_t last_modified;
+  if (time(&last_modified) == 0) {  // time is not yet set
+    return *this;
+  }
+  return setLastModified(last_modified);
+}
+
+bool AsyncStaticWebHandler::canHandle(AsyncWebServerRequest *request) const {
+  return request->isHTTP() && request->method() == HTTP_GET && request->url().startsWith(_uri) && _getFile(request);
+}
+
+bool AsyncStaticWebHandler::_getFile(AsyncWebServerRequest *request) const {
+  // Remove the found uri
+  String path = request->url().substring(_uri.length());
+
+  // We can skip the file check and look for default if request is to the root of a directory or that request path ends with '/'
+  bool canSkipFileCheck = (_isDir && path.length() == 0) || (path.length() && path[path.length() - 1] == '/');
+
+  path = _path + path;
+
+  // Do we have a file or .gz file
+  if (!canSkipFileCheck && const_cast<AsyncStaticWebHandler *>(this)->_searchFile(request, path)) {
+    return true;
+  }
+
+  // Can't handle if not default file
+  if (_default_file.length() == 0) {
+    return false;
+  }
+
+  // Try to add default file, ensure there is a trailing '/' to the path.
+  if (path.length() == 0 || path[path.length() - 1] != '/') {
+    path += String('/');
+  }
+  path += _default_file;
+
+  return const_cast<AsyncStaticWebHandler *>(this)->_searchFile(request, path);
+}
+
+#ifdef ESP32
+#define FILE_IS_REAL(f) (f == true && !f.isDirectory())
+#else
+#define FILE_IS_REAL(f) (f == true)
+#endif
+
+bool AsyncStaticWebHandler::_searchFile(AsyncWebServerRequest *request, const String &path) {
+  bool fileFound = false;
+  bool gzipFound = false;
+
+  String gzip = path + T__gz;
+
+  if (_tryGzipFirst) {
+    if (_fs.exists(gzip)) {
+      request->_tempFile = _fs.open(gzip, fs::FileOpenMode::read);
+      gzipFound = FILE_IS_REAL(request->_tempFile);
+    }
+    if (!gzipFound) {
+      if (_fs.exists(path)) {
+        request->_tempFile = _fs.open(path, fs::FileOpenMode::read);
+        fileFound = FILE_IS_REAL(request->_tempFile);
+      }
+    }
+  } else {
+    if (_fs.exists(path)) {
+      request->_tempFile = _fs.open(path, fs::FileOpenMode::read);
+      fileFound = FILE_IS_REAL(request->_tempFile);
+    }
+    if (!fileFound) {
+      if (_fs.exists(gzip)) {
+        request->_tempFile = _fs.open(gzip, fs::FileOpenMode::read);
+        gzipFound = FILE_IS_REAL(request->_tempFile);
+      }
+    }
+  }
+
+  bool found = fileFound || gzipFound;
+
+  if (found) {
+    // Extract the file name from the path and keep it in _tempObject
+    size_t pathLen = path.length();
+    char *_tempPath = (char *)malloc(pathLen + 1);
+    if (_tempPath == NULL) {
+#ifdef ESP32
+      log_e("Failed to allocate");
+#endif
+      request->abort();
+      request->_tempFile.close();
+      return false;
+    }
+    snprintf_P(_tempPath, pathLen + 1, PSTR("%s"), path.c_str());
+    request->_tempObject = (void *)_tempPath;
+  }
+
+  return found;
+}
+
+void AsyncStaticWebHandler::handleRequest(AsyncWebServerRequest *request) {
+  // Get the filename from request->_tempObject and free it
+  String filename((char *)request->_tempObject);
+  free(request->_tempObject);
+  request->_tempObject = NULL;
+
+  if (request->_tempFile != true) {
+    request->send(404);
+    return;
+  }
+
+  time_t lw = request->_tempFile.getLastWrite();  // get last file mod time (if supported by FS)
+  // set etag to lastmod timestamp if available, otherwise to size
+  String etag;
+  if (lw) {
+    setLastModified(lw);
+#if defined(TARGET_RP2040) || defined(TARGET_RP2350) || defined(PICO_RP2040) || defined(PICO_RP2350)
+    // time_t == long long int
+    constexpr size_t len = 1 + 8 * sizeof(time_t);
+    char buf[len];
+    char *ret = lltoa(lw ^ request->_tempFile.size(), buf, len, 10);
+    etag = ret ? String(ret) : String(request->_tempFile.size());
+#else
+    etag = lw ^ request->_tempFile.size();  // etag combines file size and lastmod timestamp
+#endif
+  } else {
+#if defined(TARGET_RP2040) || defined(TARGET_RP2350) || defined(PICO_RP2040) || defined(PICO_RP2350)
+    etag = String(request->_tempFile.size());
+#else
+    etag = request->_tempFile.size();
+#endif
+  }
+
+  bool not_modified = false;
+
+  // if-none-match has precedence over if-modified-since
+  if (request->hasHeader(T_INM)) {
+    not_modified = request->header(T_INM).equals(etag);
+  } else if (_last_modified.length()) {
+    not_modified = request->header(T_IMS).equals(_last_modified);
+  }
+
+  AsyncWebServerResponse *response;
+
+  if (not_modified) {
+    request->_tempFile.close();
+    response = new AsyncBasicResponse(304);  // Not modified
+  } else {
+    response = new AsyncFileResponse(request->_tempFile, filename, emptyString, false, _callback);
+  }
+
+  if (!response) {
+#ifdef ESP32
+    log_e("Failed to allocate");
+#endif
+    request->abort();
+    return;
+  }
+
+  response->addHeader(T_ETag, etag.c_str());
+
+  if (_last_modified.length()) {
+    response->addHeader(T_Last_Modified, _last_modified.c_str());
+  }
+  if (_cache_control.length()) {
+    response->addHeader(T_Cache_Control, _cache_control.c_str());
+  }
+
+  request->send(response);
+}
+
+AsyncStaticWebHandler &AsyncStaticWebHandler::setTemplateProcessor(AwsTemplateProcessor newCallback) {
+  _callback = newCallback;
+  return *this;
+}
+
+void AsyncCallbackWebHandler::setUri(const String &uri) {
+  _uri = uri;
+  _isRegex = uri.startsWith("^") && uri.endsWith("$");
+}
+
+bool AsyncCallbackWebHandler::canHandle(AsyncWebServerRequest *request) const {
+  if (!_onRequest || !request->isHTTP() || !(_method & request->method())) {
+    return false;
+  }
+
+#ifdef ASYNCWEBSERVER_REGEX
+  if (_isRegex) {
+    std::regex pattern(_uri.c_str());
+    std::smatch matches;
+    std::string s(request->url().c_str());
+    if (std::regex_search(s, matches, pattern)) {
+      for (size_t i = 1; i < matches.size(); ++i) {  // start from 1
+        request->_addPathParam(matches[i].str().c_str());
+      }
+    } else {
+      return false;
+    }
+  } else
+#endif
+    if (_uri.length() && _uri.startsWith("/*.")) {
+    String uriTemplate = String(_uri);
+    uriTemplate = uriTemplate.substring(uriTemplate.lastIndexOf("."));
+    if (!request->url().endsWith(uriTemplate)) {
+      return false;
+    }
+  } else if (_uri.length() && _uri.endsWith("*")) {
+    String uriTemplate = String(_uri);
+    uriTemplate = uriTemplate.substring(0, uriTemplate.length() - 1);
+    if (!request->url().startsWith(uriTemplate)) {
+      return false;
+    }
+  } else if (_uri.length() && (_uri != request->url() && !request->url().startsWith(_uri + "/"))) {
+    return false;
+  }
+
+  return true;
+}
+
+void AsyncCallbackWebHandler::handleRequest(AsyncWebServerRequest *request) {
+  if (_onRequest) {
+    _onRequest(request);
+  } else {
+    request->send(404, T_text_plain, "Not found");
+  }
+}
+void AsyncCallbackWebHandler::handleUpload(AsyncWebServerRequest *request, const String &filename, size_t index, uint8_t *data, size_t len, bool final) {
+  if (_onUpload) {
+    _onUpload(request, filename, index, data, len, final);
+  }
+}
+void AsyncCallbackWebHandler::handleBody(AsyncWebServerRequest *request, uint8_t *data, size_t len, size_t index, size_t total) {
+  // ESP_LOGD("AsyncWebServer", "AsyncCallbackWebHandler::handleBody");
+  if (_onBody) {
+    _onBody(request, data, len, index, total);
+  }
+}

Raumtermostat/lib/ESPAsyncWebServer/src/WebResponseImpl.h

@@ -0,0 +1,180 @@
+// SPDX-License-Identifier: LGPL-3.0-or-later
+// Copyright 2016-2025 Hristo Gochkov, Mathieu Carbou, Emil Muratov
+
+#ifndef ASYNCWEBSERVERRESPONSEIMPL_H_
+#define ASYNCWEBSERVERRESPONSEIMPL_H_
+
+#ifdef Arduino_h
+// arduino is not compatible with std::vector
+#undef min
+#undef max
+#endif
+#include "literals.h"
+#include <cbuf.h>
+#include <memory>
+#include <vector>
+
+// It is possible to restore these defines, but one can use _min and _max instead. Or std::min, std::max.
+
+class AsyncBasicResponse : public AsyncWebServerResponse {
+private:
+  String _content;
+
+public:
+  explicit AsyncBasicResponse(int code, const char *contentType = asyncsrv::empty, const char *content = asyncsrv::empty);
+  AsyncBasicResponse(int code, const String &contentType, const String &content = emptyString)
+    : AsyncBasicResponse(code, contentType.c_str(), content.c_str()) {}
+  void _respond(AsyncWebServerRequest *request) override final;
+  size_t _ack(AsyncWebServerRequest *request, size_t len, uint32_t time) override final;
+  bool _sourceValid() const override final {
+    return true;
+  }
+};
+
+class AsyncAbstractResponse : public AsyncWebServerResponse {
+private:
+#if ASYNCWEBSERVER_USE_CHUNK_INFLIGHT
+  // amount of response data in-flight, i.e. sent, but not acked yet
+  size_t _in_flight{0};
+  // in-flight queue credits
+  size_t _in_flight_credit{2};
+#endif
+  String _head;
+  // Data is inserted into cache at begin().
+  // This is inefficient with vector, but if we use some other container,
+  // we won't be able to access it as contiguous array of bytes when reading from it,
+  // so by gaining performance in one place, we'll lose it in another.
+  std::vector<uint8_t> _cache;
+  size_t _readDataFromCacheOrContent(uint8_t *data, const size_t len);
+  size_t _fillBufferAndProcessTemplates(uint8_t *buf, size_t maxLen);
+
+protected:
+  AwsTemplateProcessor _callback;
+
+public:
+  AsyncAbstractResponse(AwsTemplateProcessor callback = nullptr);
+  virtual ~AsyncAbstractResponse() {}
+  void _respond(AsyncWebServerRequest *request) override final;
+  size_t _ack(AsyncWebServerRequest *request, size_t len, uint32_t time) override final;
+  virtual bool _sourceValid() const {
+    return false;
+  }
+  virtual size_t _fillBuffer(uint8_t *buf __attribute__((unused)), size_t maxLen __attribute__((unused))) {
+    return 0;
+  }
+};
+
+#ifndef TEMPLATE_PLACEHOLDER
+#define TEMPLATE_PLACEHOLDER '%'
+#endif
+
+#define TEMPLATE_PARAM_NAME_LENGTH 32
+class AsyncFileResponse : public AsyncAbstractResponse {
+  using File = fs::File;
+  using FS = fs::FS;
+
+private:
+  File _content;
+  String _path;
+  void _setContentTypeFromPath(const String &path);
+
+public:
+  AsyncFileResponse(FS &fs, const String &path, const char *contentType = asyncsrv::empty, bool download = false, AwsTemplateProcessor callback = nullptr);
+  AsyncFileResponse(FS &fs, const String &path, const String &contentType, bool download = false, AwsTemplateProcessor callback = nullptr)
+    : AsyncFileResponse(fs, path, contentType.c_str(), download, callback) {}
+  AsyncFileResponse(
+    File content, const String &path, const char *contentType = asyncsrv::empty, bool download = false, AwsTemplateProcessor callback = nullptr
+  );
+  AsyncFileResponse(File content, const String &path, const String &contentType, bool download = false, AwsTemplateProcessor callback = nullptr)
+    : AsyncFileResponse(content, path, contentType.c_str(), download, callback) {}
+  ~AsyncFileResponse() {
+    _content.close();
+  }
+  bool _sourceValid() const override final {
+    return !!(_content);
+  }
+  size_t _fillBuffer(uint8_t *buf, size_t maxLen) override final;
+};
+
+class AsyncStreamResponse : public AsyncAbstractResponse {
+private:
+  Stream *_content;
+
+public:
+  AsyncStreamResponse(Stream &stream, const char *contentType, size_t len, AwsTemplateProcessor callback = nullptr);
+  AsyncStreamResponse(Stream &stream, const String &contentType, size_t len, AwsTemplateProcessor callback = nullptr)
+    : AsyncStreamResponse(stream, contentType.c_str(), len, callback) {}
+  bool _sourceValid() const override final {
+    return !!(_content);
+  }
+  size_t _fillBuffer(uint8_t *buf, size_t maxLen) override final;
+};
+
+class AsyncCallbackResponse : public AsyncAbstractResponse {
+private:
+  AwsResponseFiller _content;
+  size_t _filledLength;
+
+public:
+  AsyncCallbackResponse(const char *contentType, size_t len, AwsResponseFiller callback, AwsTemplateProcessor templateCallback = nullptr);
+  AsyncCallbackResponse(const String &contentType, size_t len, AwsResponseFiller callback, AwsTemplateProcessor templateCallback = nullptr)
+    : AsyncCallbackResponse(contentType.c_str(), len, callback, templateCallback) {}
+  bool _sourceValid() const override final {
+    return !!(_content);
+  }
+  size_t _fillBuffer(uint8_t *buf, size_t maxLen) override final;
+};
+
+class AsyncChunkedResponse : public AsyncAbstractResponse {
+private:
+  AwsResponseFiller _content;
+  size_t _filledLength;
+
+public:
+  AsyncChunkedResponse(const char *contentType, AwsResponseFiller callback, AwsTemplateProcessor templateCallback = nullptr);
+  AsyncChunkedResponse(const String &contentType, AwsResponseFiller callback, AwsTemplateProcessor templateCallback = nullptr)
+    : AsyncChunkedResponse(contentType.c_str(), callback, templateCallback) {}
+  bool _sourceValid() const override final {
+    return !!(_content);
+  }
+  size_t _fillBuffer(uint8_t *buf, size_t maxLen) override final;
+};
+
+class AsyncProgmemResponse : public AsyncAbstractResponse {
+private:
+  const uint8_t *_content;
+  size_t _readLength;
+
+public:
+  AsyncProgmemResponse(int code, const char *contentType, const uint8_t *content, size_t len, AwsTemplateProcessor callback = nullptr);
+  AsyncProgmemResponse(int code, const String &contentType, const uint8_t *content, size_t len, AwsTemplateProcessor callback = nullptr)
+    : AsyncProgmemResponse(code, contentType.c_str(), content, len, callback) {}
+  bool _sourceValid() const override final {
+    return true;
+  }
+  size_t _fillBuffer(uint8_t *buf, size_t maxLen) override final;
+};
+
+class AsyncResponseStream : public AsyncAbstractResponse, public Print {
+private:
+  std::unique_ptr<cbuf> _content;
+
+public:
+  AsyncResponseStream(const char *contentType, size_t bufferSize);
+  AsyncResponseStream(const String &contentType, size_t bufferSize) : AsyncResponseStream(contentType.c_str(), bufferSize) {}
+  bool _sourceValid() const override final {
+    return (_state < RESPONSE_END);
+  }
+  size_t _fillBuffer(uint8_t *buf, size_t maxLen) override final;
+  size_t write(const uint8_t *data, size_t len);
+  size_t write(uint8_t data);
+  /**
+   * @brief Returns the number of bytes available in the stream.
+   */
+  size_t available() const {
+    return _content->available();
+  }
+  using Print::write;
+};
+
+#endif /* ASYNCWEBSERVERRESPONSEIMPL_H_ */