feat(matter): new matter lambda function example (#11561)

Adds a new Matter Library example using lambda function to creat 6 endpoints using a single callback

libraries/Matter/examples/MatterLambdaSingleCallbackManyEPs/MatterLambdaSingleCallbackManyEPs.ino

@@ -0,0 +1,112 @@
+// 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.
+
+/*
+  This example creates 6 on-off light endpoints that share the same onChangeOnOff() callback code.
+  It uses Lambda Function with an extra Lambda Capture information that links the Endpoint to its individual information.
+  After the Matter example is commissioned, the expected Serial output shall be similar to this:
+
+Matter App Control: 'Room 1' (OnOffLight[0], Endpoint 1, GPIO 2) changed to: OFF
+Matter App Control: 'Room 1' (OnOffLight[0], Endpoint 1, GPIO 2) changed to: ON
+Matter App Control: 'Room 5' (OnOffLight[4], Endpoint 5, GPIO 10) changed to: ON
+Matter App Control: 'Room 2' (OnOffLight[1], Endpoint 2, GPIO 4) changed to: ON
+Matter App Control: 'Room 4' (OnOffLight[3], Endpoint 4, GPIO 8) changed to: ON
+Matter App Control: 'Room 6' (OnOffLight[5], Endpoint 6, GPIO 12) changed to: ON
+Matter App Control: 'Room 3' (OnOffLight[2], Endpoint 3, GPIO 6) changed to: ON
+Matter App Control: 'Room 5' (OnOffLight[4], Endpoint 5, GPIO 10) changed to: OFF
+*/
+
+// Matter Manager
+#include <Matter.h>
+#include <WiFi.h>
+
+// WiFi is manually set and started
+const char *ssid = "your-ssid";          // Change this to your WiFi SSID
+const char *password = "your-password";  // Change this to your WiFi password
+
+//number of On-Off Lights:
+const uint8_t MAX_LIGHT_NUMBER = 6;
+
+// array of OnOffLight endpoints
+MatterOnOffLight OnOffLight[MAX_LIGHT_NUMBER];
+
+// all pins, one for each on-off light
+uint8_t lightPins[MAX_LIGHT_NUMBER] = {2, 4, 6, 8, 10, 12};  // must replace it by the real pin for the target SoC and application
+
+// friendly OnOffLights names used for printing a message in the callback
+const char *lightName[MAX_LIGHT_NUMBER] = {
+  "Room 1", "Room 2", "Room 3", "Room 4", "Room 5", "Room 6",
+};
+
+// simple setup() function
+void setup() {
+  Serial.begin(115200);  // callback will just print a message in the console
+
+  // We start by connecting to a WiFi network
+  Serial.print("Connecting to ");
+  Serial.println(ssid);
+  // Manually connect to WiFi
+  WiFi.begin(ssid, password);
+  // Wait for connection
+  while (WiFi.status() != WL_CONNECTED) {
+    delay(500);
+    Serial.print(".");
+  }
+  Serial.println("\r\nWiFi connected");
+  Serial.println("IP address: ");
+  Serial.println(WiFi.localIP());
+  delay(500);
+
+  // setup all the OnOff Light endpoint and their lambda callback functions
+  for (uint8_t i = 0; i < MAX_LIGHT_NUMBER; i++) {
+    pinMode(lightPins[i], OUTPUT);  // set the GPIO function
+    OnOffLight[i].begin(false);     // off
+
+    // inline lambda function using capture array index -> it will just print a message in the console
+    OnOffLight[i].onChangeOnOff([i](bool state) -> bool {
+      // Display message with the specific light name and details
+      Serial.printf(
+        "Matter App Control: '%s' (OnOffLight[%d], Endpoint %d, GPIO %d) changed to: %s\r\n", lightName[i], i, OnOffLight[i].getEndPointId(), lightPins[i],
+        state ? "ON" : "OFF"
+      );
+
+      return true;
+    });
+  }
+  // last step, starting Matter Stack
+  Matter.begin();
+}
+
+void loop() {
+  // Check Matter Plugin 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 Plugin 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.println("Matter Node is commissioned and connected to the WiFi network. Ready for use.");
+  }
+
+  delay(500);
+}

libraries/Matter/examples/MatterLambdaSingleCallbackManyEPs/ci.json

@@ -0,0 +1,7 @@
+{
+  "fqbn_append": "PartitionScheme=huge_app",
+  "requires": [
+    "CONFIG_SOC_WIFI_SUPPORTED=y",
+    "CONFIG_ESP_MATTER_ENABLE_DATA_MODEL=y"
+  ]
+}

libraries/Matter/keywords.txt

@@ -36,8 +36,10 @@ EndPointSpeedCB	KEYWORD1
 EndPointOnOffCB	KEYWORD1
 EndPointBrightnessCB	KEYWORD1
 EndPointRGBColorCB	KEYWORD1
+EndPointIdentifyCB	KEYWORD1
 matterEvent_t	KEYWORD1
 matterEventCB	KEYWORD1
+attrOperation_t	KEYWORD1
 
 #######################################
 # Methods and Functions (KEYWORD2)
@@ -111,6 +113,10 @@ onChangeLocalTemperature	KEYWORD2
 onChangeCoolingSetpoint	KEYWORD2
 onChangeHeatingSetpoint	KEYWORD2
 onEvent	KEYWORD2
+setEndPointId	KEYWORD2
+getEndPointId	KEYWORD2
+onIdentify	KEYWORD2
+endpointIdentifyCB	KEYWORD2
 
 #######################################
 # Constants (LITERAL1)