feature(matter): New ESP32 Arduino as idf component Matter WiFi Only Example

idf_component_examples/Arduino_ESP_Matter_over_Wifi/CMakeLists.txt

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+# The following lines of boilerplate have to be in your project's
+# CMakeLists in this exact order for cmake to work correctly
+cmake_minimum_required(VERSION 3.5)
+
+include($ENV{IDF_PATH}/tools/cmake/project.cmake)
+
+#target_compile_options(espressif__esp_matter PUBLIC
+#    -DCHIP_ADDRESS_RESOLVE_IMPL_INCLUDE_HEADER=<lib/address_resolve/AddressResolve_DefaultImpl.h>
+#    -DCHIP_HAVE_CONFIG_H)
+#list(APPEND compile_definitions "CHIP_HAVE_CONFIG_H=1")
+#list(APPEND compile_definitions "CHIP_ADDRESS_RESOLVE_IMPL_INCLUDE_HEADER=<lib/address_resolve/AddressResolve_DefaultImpl.h>")
+
+project(Matter_Thread_Light)
+
+idf_build_set_property(CXX_COMPILE_OPTIONS "-std=gnu++2a;-Os;-DCHIP_HAVE_CONFIG_H" APPEND)
+idf_build_set_property(C_COMPILE_OPTIONS "-Os" APPEND)
+# For RISCV chips, project_include.cmake sets -Wno-format, but does not clear various
+# flags that depend on -Wformat
+idf_build_set_property(COMPILE_OPTIONS "-Wno-format-nonliteral;-Wno-format-security" APPEND)

idf_component_examples/Arduino_ESP_Matter_over_Wifi/README.md

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+| Supported Targets | ESP32-C5 | ESP32-C6 |
+| ----------------- | -------- | -------- |
+
+# Arduino ESP-Matter over Wi-Fi example using ESP32-C5 and ESP32-C6
+This is an Arduino as IDF Project to build an ESP-Matter over Wi-Fi RGB Light using ESP32-C5/C6 and ESP-Matter Arduino API \
+This example shall work with Arduino 3.3.2+ and also IDF 5.5.1+\
+It is necessary to make sure that the IDF version matches with the one used to release the Arduino Core version.\
+This can be done looking into release information in https://github.com/espressif/arduino-esp32/releases \
+
+**Important Note for ESP32-C5:**
+The precompiled Matter library configuration distributed within Arduino IDE enables ESP32-C5 Matter over Thread only, with no option to use Wi-Fi (including 5 GHz Wi-Fi support). This project allows you to build Matter over Wi-Fi for ESP32-C5, enabling access to its full Wi-Fi capabilities including 2.4 GHz and 5 GHz support.
+
+Any example from [ESP32 Matter Library examples](https://github.com/espressif/arduino-esp32/tree/master/libraries/Matter/examples)
+can be used to build the application.\
+Feel free to create your own Arduino Matter sketch!\
+Do not forget to rename the `sketch_file_name.ino` to `sketch_file_name.cpp` in `main` folder.
+
+The `main/idf_component.yml` file holds the ESP-Matter component version and Arduino Core version.\
+Edit this file to set the target versions, if necessary.
+
+# General Instructions:
+
+1- Install the required IDF version into your computer. It can be done following the guide in
+https://docs.espressif.com/projects/esp-idf/en/stable/esp32c6/get-started/index.html
+
+For Windows: https://docs.espressif.com/projects/esp-idf/en/stable/esp32c6/get-started/index.html \
+For Linux or macOS: https://docs.espressif.com/projects/esp-idf/en/stable/esp32c6/get-started/linux-macos-setup.html
+
+2- Test IDF with `idf.py --version` to check if it is installed and configured correctly.
+
+3- To create a ESP-IDF project from this example with the latest release of Arduino-esp32, you can simply run command:
+`idf.py create-project-from-example "espressif/arduino-esp32:Arduino_ESP_Matter_over_Wifi"`
+ESP-IDF will download all dependencies needed from the component registry and setup the project for you.
+
+4- Open an IDF terminal and execute `idf.py set-target esp32c5` or `idf.py set-target esp32c6` (ESP32-C5 and ESP32-C6 are the supported targets)
+
+5- Execute `idf.py -p <your COM or /dev/tty port connected to the ESP32-C5/C6> flash monitor`
+
+6- It will build, upload and show the UART0 output in the screen.
+
+7- Try to add the new Matter device to your local Matter environment.

idf_component_examples/Arduino_ESP_Matter_over_Wifi/ci.yml

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+targets:
+  esp32c2: false
+  esp32p4: false
+requires:
+  - CONFIG_ESP_MATTER_ENABLE_DATA_MODEL=y
+  - CONFIG_MBEDTLS_HKDF_C=y

idf_component_examples/Arduino_ESP_Matter_over_Wifi/main/CMakeLists.txt

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+idf_component_register(SRC_DIRS          "."
+                       INCLUDE_DIRS      ".")

idf_component_examples/Arduino_ESP_Matter_over_Wifi/main/MatterEnhancedColorLight.cpp

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+// Copyright 2025 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.
+
+// Matter Manager
+#include <Matter.h>
+#include <Preferences.h>
+
+// List of Matter Endpoints for this Node
+// Color Light Endpoint
+MatterEnhancedColorLight EnhancedColorLight;
+
+// It will use HSV color to control all Matter Attribute Changes
+HsvColor_t currentHSVColor = {0, 0, 0};
+
+// it will keep last OnOff & HSV Color state stored, using Preferences
+Preferences matterPref;
+const char *onOffPrefKey = "OnOff";
+const char *hsvColorPrefKey = "HSV";
+
+// set your board RGB LED pin here
+#ifdef RGB_BUILTIN
+const uint8_t ledPin = RGB_BUILTIN;
+#else
+const uint8_t ledPin = 2;  // Set your pin here if your board has not defined LED_BUILTIN
+#warning "Do not forget to set the RGB LED pin"
+#endif
+
+// set your board USER BUTTON pin here
+const uint8_t buttonPin = BOOT_PIN;  // Set your pin here. Using BOOT Button.
+
+// Button control
+uint32_t button_time_stamp = 0;                // debouncing control
+bool button_state = false;                     // false = released | true = pressed
+const uint32_t debounceTime = 250;             // button debouncing time (ms)
+const uint32_t decommissioningTimeout = 5000;  // keep the button pressed for 5s, or longer, to decommission
+
+// Set the RGB LED Light based on the current state of the Enhanced Color Light
+bool setLightState(bool state, espHsvColor_t colorHSV, uint8_t brightness, uint16_t temperature_Mireds) {
+
+  if (state) {
+#ifdef RGB_BUILTIN
+    // currentHSVColor keeps final color result
+    espRgbColor_t rgbColor = espHsvColorToRgbColor(currentHSVColor);
+    // set the RGB LED
+    rgbLedWrite(ledPin, rgbColor.r, rgbColor.g, rgbColor.b);
+#else
+    // No Color RGB LED, just use the HSV value (brightness) to control the LED
+    analogWrite(ledPin, colorHSV.v);
+#endif
+  } else {
+#ifndef RGB_BUILTIN
+    // after analogWrite(), it is necessary to set the GPIO to digital mode first
+    pinMode(ledPin, OUTPUT);
+#endif
+    digitalWrite(ledPin, LOW);
+  }
+  // store last HSV Color and OnOff state for when the Light is restarted / power goes off
+  matterPref.putBool(onOffPrefKey, state);
+  matterPref.putUInt(hsvColorPrefKey, currentHSVColor.h << 16 | currentHSVColor.s << 8 | currentHSVColor.v);
+  // This callback must return the success state to Matter core
+  return true;
+}
+
+void setup() {
+  // Initialize the USER BUTTON (Boot button) GPIO that will act as a toggle switch
+  pinMode(buttonPin, INPUT_PULLUP);
+  // Initialize the LED (light) GPIO and Matter End Point
+  pinMode(ledPin, OUTPUT);
+
+  Serial.begin(115200);
+
+  // Initialize Matter EndPoint
+  matterPref.begin("MatterPrefs", false);
+  // default OnOff state is ON if not stored before
+  bool lastOnOffState = matterPref.getBool(onOffPrefKey, true);
+  // default HSV color is (21, 216, 25) - Warm White Color at 10% intensity
+  uint32_t prefHsvColor = matterPref.getUInt(hsvColorPrefKey, 21 << 16 | 216 << 8 | 25);
+  currentHSVColor = {uint8_t(prefHsvColor >> 16), uint8_t(prefHsvColor >> 8), uint8_t(prefHsvColor)};
+  EnhancedColorLight.begin(lastOnOffState, currentHSVColor);
+  // set the callback function to handle the Light state change
+  EnhancedColorLight.onChange(setLightState);
+
+  // lambda functions are used to set the attribute change callbacks
+  EnhancedColorLight.onChangeOnOff([](bool state) {
+    Serial.printf("Light OnOff changed to %s\r\n", state ? "ON" : "OFF");
+    return true;
+  });
+  EnhancedColorLight.onChangeColorTemperature([](uint16_t colorTemperature) {
+    Serial.printf("Light Color Temperature changed to %d\r\n", colorTemperature);
+    // get correspondent Hue and Saturation of the color temperature
+    HsvColor_t hsvTemperature = espRgbColorToHsvColor(espCTToRgbColor(colorTemperature));
+    // keep previous the brightness and just change the Hue and Saturation
+    currentHSVColor.h = hsvTemperature.h;
+    currentHSVColor.s = hsvTemperature.s;
+    return true;
+  });
+  EnhancedColorLight.onChangeBrightness([](uint8_t brightness) {
+    Serial.printf("Light brightness changed to %d\r\n", brightness);
+    // change current brightness (HSV value)
+    currentHSVColor.v = brightness;
+    return true;
+  });
+  EnhancedColorLight.onChangeColorHSV([](HsvColor_t hsvColor) {
+    Serial.printf("Light HSV Color changed to (%d,%d,%d)\r\n", hsvColor.h, hsvColor.s, hsvColor.v);
+    // keep the current brightness and just change Hue and Saturation
+    currentHSVColor.h = hsvColor.h;
+    currentHSVColor.s = hsvColor.s;
+    return true;
+  });
+
+  // Matter beginning - Last step, after all EndPoints are initialized
+  Matter.begin();
+  // This may be a restart of a already commissioned Matter accessory
+  if (Matter.isDeviceCommissioned()) {
+    Serial.println("Matter Node is commissioned and connected to the network. Ready for use.");
+    Serial.printf(
+      "Initial state: %s | RGB Color: (%d,%d,%d) \r\n", EnhancedColorLight ? "ON" : "OFF", EnhancedColorLight.getColorRGB().r,
+      EnhancedColorLight.getColorRGB().g, EnhancedColorLight.getColorRGB().b
+    );
+    // configure the Light based on initial on-off state and its color
+    EnhancedColorLight.updateAccessory();
+  }
+}
+
+void loop() {
+  // Check Matter Light Commissioning state, which may change during execution of loop()
+  if (!Matter.isDeviceCommissioned()) {
+    Serial.println("");
+    Serial.println("Matter Node is not commissioned yet.");
+    Serial.println("Initiate the device discovery in your Matter environment.");
+    Serial.println("Commission it to your Matter hub with the manual pairing code or QR code");
+    Serial.printf("Manual pairing code: %s\r\n", Matter.getManualPairingCode().c_str());
+    Serial.printf("QR code URL: %s\r\n", Matter.getOnboardingQRCodeUrl().c_str());
+    // waits for Matter Light Commissioning.
+    uint32_t timeCount = 0;
+    while (!Matter.isDeviceCommissioned()) {
+      delay(100);
+      if ((timeCount++ % 50) == 0) {  // 50*100ms = 5 sec
+        Serial.println("Matter Node not commissioned yet. Waiting for commissioning.");
+      }
+    }
+    Serial.printf(
+      "Initial state: %s | RGB Color: (%d,%d,%d) \r\n", EnhancedColorLight ? "ON" : "OFF", EnhancedColorLight.getColorRGB().r,
+      EnhancedColorLight.getColorRGB().g, EnhancedColorLight.getColorRGB().b
+    );
+    // configure the Light based on initial on-off state and its color
+    EnhancedColorLight.updateAccessory();
+    Serial.println("Matter Node is commissioned and connected to the network. Ready for use.");
+  }
+
+  // A button is also used to control the light
+  // Check if the button has been pressed
+  if (digitalRead(buttonPin) == LOW && !button_state) {
+    // deals with button debouncing
+    button_time_stamp = millis();  // record the time while the button is pressed.
+    button_state = true;           // pressed.
+  }
+
+  // Onboard User Button is used as a Light toggle switch or to decommission it
+  uint32_t time_diff = millis() - button_time_stamp;
+  if (button_state && time_diff > debounceTime && digitalRead(buttonPin) == HIGH) {
+    button_state = false;  // released
+    // Toggle button is released - toggle the light
+    Serial.println("User button released. Toggling Light!");
+    EnhancedColorLight.toggle();  // Matter Controller also can see the change
+  }
+
+  // Onboard User Button is kept pressed for longer than 5 seconds in order to decommission matter node
+  if (button_state && time_diff > decommissioningTimeout) {
+    Serial.println("Decommissioning the Light Matter Accessory. It shall be commissioned again.");
+    EnhancedColorLight = false;  // turn the light off
+    Matter.decommission();
+    button_time_stamp = millis();  // avoid running decommissining again, reboot takes a second or so
+  }
+}

idf_component_examples/Arduino_ESP_Matter_over_Wifi/main/idf_component.yml

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+dependencies:
+  espressif/esp_matter:
+    version: ">=1.3.0"
+    require: public
+  espressif/arduino-esp32:
+    version: ">=3.1.0"
+    override_path: "../../../"
+    pre_release: true

idf_component_examples/Arduino_ESP_Matter_over_Wifi/partitions.csv

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+# Name,   Type, SubType, Offset,  Size, Flags
+# Note: Firmware partition offset needs to be 64K aligned, initial 36K (9 sectors) are reserved for bootloader and partition table
+esp_secure_cert,  0x3F, ,0xd000,    0x2000, encrypted
+nvs,      data, nvs,     0x10000,   0xC000,
+nvs_keys, data, nvs_keys,,          0x1000, encrypted
+otadata,  data, ota,     ,          0x2000
+phy_init, data, phy,     ,          0x1000,
+ota_0,    app,  ota_0,   0x20000,   0x1E0000,
+ota_1,    app,  ota_1,   0x200000,  0x1E0000,
+fctry,    data, nvs,     0x3E0000,  0x6000

idf_component_examples/Arduino_ESP_Matter_over_Wifi/sdkconfig.defaults

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+# Arduino ESP32 settings
+CONFIG_BOOTLOADER_LOG_LEVEL_ERROR=y
+CONFIG_AUTOSTART_ARDUINO=y
+CONFIG_ARDUHAL_LOG_DEFAULT_LEVEL_INFO=y
+CONFIG_FREERTOS_HZ=1000
+CONFIG_LOG_DEFAULT_LEVEL_ERROR=y
+
+# Enables Arduino Selective Library Compilation: Arduino Matter + Preferences Library
+CONFIG_ARDUINO_SELECTIVE_COMPILATION=y
+CONFIG_ARDUINO_SELECTIVE_Preferences=y
+CONFIG_ARDUINO_SELECTIVE_Network=y
+CONFIG_ARDUINO_SELECTIVE_ESPmDNS=y
+CONFIG_ARDUINO_SELECTIVE_Matter=y
+
+# Flash Configuration
+CONFIG_ESPTOOLPY_FLASHMODE_QIO=y
+CONFIG_ESPTOOLPY_FLASH_SAMPLE_MODE_STR=y
+CONFIG_ESPTOOLPY_FLASHMODE="dio"
+CONFIG_ESPTOOLPY_FLASHFREQ_80M=y
+CONFIG_ESPTOOLPY_FLASHFREQ="80m"
+CONFIG_ESPTOOLPY_FLASHSIZE_4MB=y
+CONFIG_ESPTOOLPY_FLASHSIZE="4MB"
+CONFIG_ESPTOOLPY_HEADER_FLASHSIZE_UPDATE=y
+CONFIG_ESPTOOLPY_BEFORE_RESET=y
+CONFIG_ESPTOOLPY_BEFORE="default_reset"
+CONFIG_ESPTOOLPY_AFTER_RESET=y
+CONFIG_ESPTOOLPY_AFTER="hard_reset"
+CONFIG_ESPTOOLPY_MONITOR_BAUD=115200
+
+# libsodium
+CONFIG_LIBSODIUM_USE_MBEDTLS_SHA=y
+
+# NIMBLE
+CONFIG_BT_ENABLED=y
+CONFIG_BT_NIMBLE_ENABLED=y
+CONFIG_BT_NIMBLE_EXT_ADV=n
+CONFIG_BT_NIMBLE_HCI_EVT_BUF_SIZE=70
+CONFIG_USE_BLE_ONLY_FOR_COMMISSIONING=n
+
+# Disable lwip ipv6 autoconfig
+CONFIG_LWIP_IPV6_AUTOCONFIG=n
+
+# Use a custom partition table
+CONFIG_PARTITION_TABLE_CUSTOM=y
+CONFIG_PARTITION_TABLE_CUSTOM_FILENAME="partitions.csv"
+
+# MDNS platform
+#CONFIG_USE_MINIMAL_MDNS=n
+#CONFIG_ENABLE_EXTENDED_DISCOVERY=y
+
+# Enable HKDF in mbedtls
+CONFIG_MBEDTLS_HKDF_C=y
+