feat(matter): adds new Temperature Sensor Matter Endpoint (#10698)

* feat(matter): adds new temperature sensor matter endpoint

* feat(matter): commentaries review and fixes

* feat(matter): commentaries review and fixes

* feat(matter): commentaries review and fixes

* feat(matter): commentaries review and fixes

* feat(matter): commentaries review and fixes

* feat(matter): commentaries review and fixes

* feat(matter): general commentaries and code review

* feat(matter): keeping arduino style for local variables (lower case)

* feat(matter): applies a generic temperature unit to the implementation and example

* fix(matter): fixed problem with begin(float) implementation

* fix(matter): fixed begin(float) initiallization

* feat(matter): updated matter temperature keywords with new api

* ci(pre-commit): Apply automatic fixes

* fix(matter): fixed code spell ci errors in matter temperature sensor

---------

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

CMakeLists.txt

@@ -175,6 +175,7 @@ set(ARDUINO_LIBRARY_Matter_SRCS
   libraries/Matter/src/MatterEndpoints/MatterColorLight.cpp
   libraries/Matter/src/MatterEndpoints/MatterEnhancedColorLight.cpp
   libraries/Matter/src/MatterEndpoints/MatterFan.cpp
+  libraries/Matter/src/MatterEndpoints/MatterTemperatureSensor.cpp
   libraries/Matter/src/Matter.cpp)
 
 set(ARDUINO_LIBRARY_PPP_SRCS

libraries/Matter/examples/MatterTemperatureSensor/MatterTemperatureSensor.ino

@@ -0,0 +1,94 @@
+// 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.
+
+/*
+ * This example is an example code that will create a Matter Device which can be
+ * commissioned and controlled from a Matter Environment APP.
+ * Additionally the ESP32 will send debug messages indicating the Matter activity.
+ * Turning DEBUG Level ON may be useful to following Matter Accessory and Controller messages.
+ */
+
+// Matter Manager
+#include <Matter.h>
+#include <WiFi.h>
+
+// List of Matter Endpoints for this Node
+// Matter Temperature Sensor Endpoint
+MatterTemperatureSensor SimulatedTemperatureSensor;
+
+// 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
+
+// Simulate a temperature sensor - add your preferred temperature sensor library code here
+float getSimulatedTemperature() {
+  // The Endpoint implementation keeps an int16_t as internal value information,
+  // which stores data in 1/100th of any temperature unit
+  static float simulatedTempHWSensor = -10.0;
+
+  // it will increase from -10C to 10C in 0.5C steps to simulate a temperature sensor
+  simulatedTempHWSensor = simulatedTempHWSensor + 0.5;
+  if (simulatedTempHWSensor > 10) {
+    simulatedTempHWSensor = -10;
+  }
+
+  return simulatedTempHWSensor;
+}
+
+void setup() {
+  Serial.begin(115200);
+
+  // Manually connect to WiFi
+  WiFi.begin(ssid, password);
+  // Wait for connection
+  while (WiFi.status() != WL_CONNECTED) {
+    delay(500);
+    Serial.print(".");
+  }
+  Serial.println();
+
+  // set initial temperature sensor measurement
+  // Simulated Sensor - it shall initially print -25 degrees and then move to the -10 to 10 range
+  SimulatedTemperatureSensor.begin(-25.00);
+
+  // Matter beginning - Last step, after all EndPoints are initialized
+  Matter.begin();
+
+  // 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 Temperature Sensor 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.");
+  }
+}
+
+void loop() {
+  Serial.printf("Current Temperature is %.02f <Temperature Units>\r\n", SimulatedTemperatureSensor.getTemperature());
+  // update the temperature sensor value every 5 seconds
+  // Matter APP shall display the updated temperature
+  delay(5000);
+  SimulatedTemperatureSensor.setTemperature(getSimulatedTemperature());
+}

libraries/Matter/examples/MatterTemperatureSensor/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

@@ -18,6 +18,7 @@ MatterEndPoint	KEYWORD1
 MatterFan	KEYWORD1
 FanMode_t	KEYWORD1
 FanModeSequence_t	KEYWORD1
+MatterTemperatureSensor	KEYWORD1
 
 #######################################
 # Methods and Functions (KEYWORD2)
@@ -62,6 +63,8 @@ setMode	KEYWORD2
 getMode	KEYWORD2
 onChangeMode	KEYWORD2
 onChangeSpeedPercent	KEYWORD2
+setTemperature	KEYWORD2
+getTemperature	KEYWORD2
 
 #######################################
 # Constants (LITERAL1)

libraries/Matter/src/Matter.h

@@ -26,6 +26,7 @@
 #include <MatterEndpoints/MatterColorLight.h>
 #include <MatterEndpoints/MatterEnhancedColorLight.h>
 #include <MatterEndpoints/MatterFan.h>
+#include <MatterEndpoints/MatterTemperatureSensor.h>
 
 using namespace esp_matter;
 
@@ -58,6 +59,7 @@ public:
   friend class MatterColorLight;
   friend class MatterEnhancedColorLight;
   friend class MatterFan;
+  friend class MatterTemperatureSensor;
 
 protected:
   static void _init();

libraries/Matter/src/MatterEndpoints/MatterTemperatureSensor.cpp

@@ -0,0 +1,99 @@
+// 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 <MatterEndpoints/MatterTemperatureSensor.h>
+
+using namespace esp_matter;
+using namespace esp_matter::endpoint;
+using namespace chip::app::Clusters;
+
+bool MatterTemperatureSensor::attributeChangeCB(uint16_t endpoint_id, uint32_t cluster_id, uint32_t attribute_id, esp_matter_attr_val_t *val) {
+  bool ret = true;
+  if (!started) {
+    log_e("Matter Temperature Sensor device has not begun.");
+    return false;
+  }
+
+  log_d("Temperature Sensor Attr update callback: endpoint: %u, cluster: %u, attribute: %u, val: %u", endpoint_id, cluster_id, attribute_id, val->val.u32);
+  return ret;
+}
+
+MatterTemperatureSensor::MatterTemperatureSensor() {}
+
+MatterTemperatureSensor::~MatterTemperatureSensor() {
+  end();
+}
+
+bool MatterTemperatureSensor::begin(int16_t _rawTemperature) {
+  ArduinoMatter::_init();
+
+  temperature_sensor::config_t temperature_sensor_config;
+  temperature_sensor_config.temperature_measurement.measured_value = _rawTemperature;
+  temperature_sensor_config.temperature_measurement.min_measured_value = nullptr;
+  temperature_sensor_config.temperature_measurement.max_measured_value = nullptr;
+
+  // endpoint handles can be used to add/modify clusters
+  endpoint_t *endpoint = temperature_sensor::create(node::get(), &temperature_sensor_config, ENDPOINT_FLAG_NONE, (void *)this);
+  if (endpoint == nullptr) {
+    log_e("Failed to create Temperature Sensor endpoint");
+    return false;
+  }
+  rawTemperature = _rawTemperature;
+  setEndPointId(endpoint::get_id(endpoint));
+  log_i("Temperature Sensor created with endpoint_id %d", getEndPointId());
+  started = true;
+  return true;
+}
+
+void MatterTemperatureSensor::end() {
+  started = false;
+}
+
+bool MatterTemperatureSensor::setRawTemperature(int16_t _rawTemperature) {
+  if (!started) {
+    log_e("Matter Temperature Sensor device has not begun.");
+    return false;
+  }
+
+  // avoid processing the a "no-change"
+  if (rawTemperature == _rawTemperature) {
+    return true;
+  }
+
+  esp_matter_attr_val_t temperatureVal = esp_matter_invalid(NULL);
+
+  if (!getAttributeVal(TemperatureMeasurement::Id, TemperatureMeasurement::Attributes::MeasuredValue::Id, &temperatureVal)) {
+    log_e("Failed to get Temperature Sensor Attribute.");
+    return false;
+  }
+  if (temperatureVal.val.i16 != _rawTemperature) {
+    temperatureVal.val.i16 = _rawTemperature;
+    bool ret;
+    ret = updateAttributeVal(TemperatureMeasurement::Id, TemperatureMeasurement::Attributes::MeasuredValue::Id, &temperatureVal);
+    if (!ret) {
+      log_e("Failed to update Fan Speed Percent Attribute.");
+      return false;
+    }
+    rawTemperature = _rawTemperature;
+  }
+  log_v("Temperature Sensor set to %.02f Degrees", (float)_rawTemperature / 100.00);
+
+  return true;
+}
+
+#endif /* CONFIG_ESP_MATTER_ENABLE_DATA_MODEL */

libraries/Matter/src/MatterEndpoints/MatterTemperatureSensor.h

@@ -0,0 +1,63 @@
+// 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>
+
+class MatterTemperatureSensor : public MatterEndPoint {
+public:
+  MatterTemperatureSensor();
+  ~MatterTemperatureSensor();
+  // begin Matter Temperature Sensor endpoint with initial float temperature
+  bool begin(double temperature = 0.00) {
+    return begin(static_cast<int16_t>(temperature * 100.0f));
+  }
+  // this will stop processing Temperature Sensor Matter events
+  void end();
+
+  // set the reported raw temperature
+  bool setTemperature(double temperature) {
+    // stores up to 1/100th of a degree precision
+    int16_t rawValue = static_cast<int16_t>(temperature * 100.0f);
+    return setRawTemperature(rawValue);
+  }
+  // returns the reported float temperature with 1/100th of a degree precision
+  double getTemperature() {
+    return (double)rawTemperature / 100.0;
+  }
+  // double conversion operator
+  void operator=(double temperature) {
+    setTemperature(temperature);
+  }
+  // double conversion operator
+  operator double() {
+    return (double)getTemperature();
+  }
+
+  // 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;
+  // implementation keeps temperature in 1/100th of a degree, any temperature unit
+  int16_t rawTemperature = 0;
+  // internal function to set the raw temperature value (Matter Cluster)
+  bool setRawTemperature(int16_t _rawTemperature);
+  bool begin(int16_t _rawTemperature);
+};
+#endif /* CONFIG_ESP_MATTER_ENABLE_DATA_MODEL */