feat(matter): Adds a new Matter Endpoint: Generic Switch (smart button) (#10662)

* feat(matter): adds new matter generic switch endpoint

* fix(matter): no need of arduino preferences here

* ci(pre-commit): Apply automatic fixes

---------

Co-authored-by: pre-commit-ci-lite[bot] <117423508+pre-commit-ci-lite[bot]@users.noreply.github.com>

Author: SuGlider

Diff for: CMakeLists.txt

@@ -168,6 +168,7 @@ set(ARDUINO_LIBRARY_OpenThread_SRCS
   libraries/OpenThread/src/OThreadCLI_Util.cpp)
 
 set(ARDUINO_LIBRARY_Matter_SRCS
+  libraries/Matter/src/MatterEndpoints/MatterGenericSwitch.cpp
   libraries/Matter/src/MatterEndpoints/MatterOnOffLight.cpp
   libraries/Matter/src/MatterEndpoints/MatterDimmableLight.cpp
   libraries/Matter/src/MatterEndpoints/MatterColorTemperatureLight.cpp

Diff for: libraries/Matter/examples/MatterSmartButon/MatterSmartButon.ino

@@ -0,0 +1,115 @@
+// 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.
+
+// Matter Manager
+#include <Matter.h>
+#include <WiFi.h>
+
+// List of Matter Endpoints for this Node
+// Generic Switch Endpoint - works as a smart button with a single click
+MatterGenericSwitch SmartButton;
+
+// set your board USER BUTTON pin here
+const uint8_t buttonPin = 0;  // Set your pin here. Using BOOT Button. C6/C3 use GPIO9.
+
+// 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
+
+void setup() {
+  // Initialize the USER BUTTON (Boot button) GPIO that will act as a toggle switch
+  pinMode(buttonPin, INPUT_PULLUP);
+
+  Serial.begin(115200);
+  while (!Serial) {
+    delay(100);
+  }
+
+  // We start by connecting to a WiFi network
+  Serial.print("Connecting to ");
+  Serial.println(ssid);
+  // enable IPv6
+  WiFi.enableIPv6(true);
+  // 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);
+
+  // Initialize the Matter EndPoint
+  SmartButton.begin();
+
+  // 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 Wi-Fi. Ready for use.");
+  }
+}
+// Button control
+uint32_t button_time_stamp = 0;                 // debouncing control
+bool button_state = false;                      // false = released | true = pressed
+const uint32_t debouceTime = 250;               // button debouncing time (ms)
+const uint32_t decommissioningTimeout = 10000;  // keep the button pressed for 10s to decommission the Matter Fabric
+
+void loop() {
+  // Check Matter Accessory 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 Generic Switch 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 Wi-Fi. Ready for use.");
+  }
+
+  // A builtin button is used to trigger a command to the Matter Controller
+  // 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 smart button or to decommission it
+  uint32_t time_diff = millis() - button_time_stamp;
+  if (button_state && time_diff > debouceTime && digitalRead(buttonPin) == HIGH) {
+    button_state = false;  // released
+    // builtin button is released - send a click event to the Matter Controller
+    Serial.println("User button released. Sending Click to the Matter Controller!");
+    // Matter Controller will receive an event and, if programmed, it will trigger an action
+    SmartButton.click();
+
+    // Factory reset is triggered if the button is pressed longer than 10 seconds
+    if (time_diff > decommissioningTimeout) {
+      Serial.println("Decommissioning the Generic Switch Matter Accessory. It shall be commissioned again.");
+      Matter.decommission();
+    }
+  }
+}

Diff for: libraries/Matter/examples/MatterSmartButon/ci.json

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

Diff for: libraries/Matter/keywords.txt

@@ -8,6 +8,7 @@
 
 Matter	KEYWORD1
 ArduinoMatter	KEYWORD1
+MatterGenericSwitch	KEYWORD1
 MatterOnOffLight	KEYWORD1
 MatterDimmableLight	KEYWORD1
 MatterColorTemperatureLight	KEYWORD1
@@ -46,7 +47,7 @@ onChangeOnOff	KEYWORD2
 onChangeBrightness	KEYWORD2
 onChangeColorTemperature	KEYWORD2
 onChangeColorHSV	KEYWORD2
-
+click	KEYWORD2
 
 #######################################
 # Constants (LITERAL1)

Diff for: libraries/Matter/src/Matter.h

@@ -19,6 +19,7 @@
 #include <Arduino.h>
 #include <esp_matter.h>
 #include <ColorFormat.h>
+#include <MatterEndpoints/MatterGenericSwitch.h>
 #include <MatterEndpoints/MatterOnOffLight.h>
 #include <MatterEndpoints/MatterDimmableLight.h>
 #include <MatterEndpoints/MatterColorTemperatureLight.h>
@@ -49,6 +50,7 @@ class ArduinoMatter {
   static void decommission();
 
   // list of Matter EndPoints Friend Classes
+  friend class MatterGenericSwitch;
   friend class MatterOnOffLight;
   friend class MatterDimmableLight;
   friend class MatterColorTemperatureLight;

Diff for: libraries/Matter/src/MatterEndpoints/MatterGenericSwitch.cpp

@@ -0,0 +1,100 @@
+// 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 <sdkconfig.h>
+#ifdef CONFIG_ESP_MATTER_ENABLE_DATA_MODEL
+
+#include <Matter.h>
+#include <app/server/Server.h>
+#include <MatterEndpoints/MatterGenericSwitch.h>
+
+using namespace esp_matter;
+using namespace esp_matter::endpoint;
+using namespace esp_matter::cluster;
+using namespace chip::app::Clusters;
+
+MatterGenericSwitch::MatterGenericSwitch() {}
+
+MatterGenericSwitch::~MatterGenericSwitch() {
+  end();
+}
+
+bool MatterGenericSwitch::attributeChangeCB(uint16_t endpoint_id, uint32_t cluster_id, uint32_t attribute_id, esp_matter_attr_val_t *val) {
+  if (!started) {
+    log_e("Matter Generic Switch device has not begun.");
+    return false;
+  }
+
+  log_d("Generic Switch Attr update callback: endpoint: %u, cluster: %u, attribute: %u, val: %u", endpoint_id, cluster_id, attribute_id, val->val.u32);
+  return true;
+}
+
+bool MatterGenericSwitch::begin() {
+  ArduinoMatter::_init();
+  generic_switch::config_t switch_config;
+
+  // endpoint handles can be used to add/modify clusters.
+  endpoint_t *endpoint = generic_switch::create(node::get(), &switch_config, ENDPOINT_FLAG_NONE, (void *)this);
+  if (endpoint == nullptr) {
+    log_e("Failed to create Generic swtich endpoint");
+    return false;
+  }
+  // Add group cluster to the switch endpoint
+  cluster::groups::config_t groups_config;
+  cluster::groups::create(endpoint, &groups_config, CLUSTER_FLAG_SERVER | CLUSTER_FLAG_CLIENT);
+
+  cluster_t *aCluster = cluster::get(endpoint, Descriptor::Id);
+  esp_matter::cluster::descriptor::feature::taglist::add(aCluster);
+
+  cluster::fixed_label::config_t fl_config;
+  cluster::fixed_label::create(endpoint, &fl_config, CLUSTER_FLAG_SERVER);
+
+  cluster::user_label::config_t ul_config;
+  cluster::user_label::create(endpoint, &ul_config, CLUSTER_FLAG_SERVER);
+
+  aCluster = cluster::get(endpoint, Switch::Id);
+  switch_cluster::feature::momentary_switch::add(aCluster);
+  switch_cluster::event::create_initial_press(aCluster);
+
+  switch_cluster::feature::momentary_switch::add(aCluster);
+
+  switch_cluster::attribute::create_current_position(aCluster, 0);
+  switch_cluster::attribute::create_number_of_positions(aCluster, 2);
+
+  setEndPointId(endpoint::get_id(endpoint));
+  log_i("Generic Switch created with endpoint_id %d", getEndPointId());
+  started = true;
+  return true;
+}
+
+void MatterGenericSwitch::end() {
+  started = false;
+}
+
+void MatterGenericSwitch::click() {
+  if (!started) {
+    log_e("Matter Generic Switch device has not begun.");
+    return;
+  }
+
+  int switch_endpoint_id = getEndPointId();
+  uint8_t newPosition = 1;
+  // Press moves Position from 0 (off) to 1 (on)
+  chip::DeviceLayer::SystemLayer().ScheduleLambda([switch_endpoint_id, newPosition]() {
+    // InitialPress event takes newPosition as event data
+    switch_cluster::event::send_initial_press(switch_endpoint_id, newPosition);
+  });
+}
+
+#endif /* CONFIG_ESP_MATTER_ENABLE_DATA_MODEL */

Diff for: libraries/Matter/src/MatterEndpoints/MatterGenericSwitch.h

@@ -0,0 +1,39 @@
+// 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.
+
+#pragma once
+#include <sdkconfig.h>
+#ifdef CONFIG_ESP_MATTER_ENABLE_DATA_MODEL
+
+#include <Matter.h>
+#include <MatterEndPoint.h>
+
+// Matter Generic Switch Endpoint that works as a single click smart button
+class MatterGenericSwitch : public MatterEndPoint {
+public:
+  MatterGenericSwitch();
+  ~MatterGenericSwitch();
+  virtual bool begin();
+  void end();  // this will just stop processing Matter events
+
+  // send a simple click event to the Matter Controller
+  void click();
+
+  // this function is called by Matter internal event processor. It could be overwritten by the application, if necessary.
+  bool attributeChangeCB(uint16_t endpoint_id, uint32_t cluster_id, uint32_t attribute_id, esp_matter_attr_val_t *val);
+
+protected:
+  bool started = false;
+};
+#endif /* CONFIG_ESP_MATTER_ENABLE_DATA_MODEL */