Added event callback to sensors

code/espurna/sensor.ino

@@ -396,6 +396,12 @@ void _sensorInit() {
 
 }
 
+void _sensorCallback(unsigned char i, unsigned char type, const char * payload) {
+
+    DEBUG_MSG_P(PSTR("[SENSOR] Sensor #%u callback, type %u, payload: '%s'\n"), i, type, payload);
+
+}
+
 void _sensorConfigure() {
 
     for (unsigned char i=0; i<_sensors.size(); i++) {
@@ -430,6 +436,11 @@ void _sensorConfigure() {
         // Force sensor to reload config
         _sensors[i]->begin();
 
+        // Hook callback
+        _sensors[i]->onEvent([i](unsigned char type, const char * payload) {
+            _sensorCallback(i, type, payload);
+        });
+
         #if HLW8012_SUPPORT
 
 

code/espurna/sensors/BaseSensor.h

@@ -21,6 +21,8 @@
 #define SENSOR_ERROR_I2C            6       // Wrong or locked I2C address
 #define SENSOR_ERROR_GPIO_USED      7       // The GPIO is already in use
 
+typedef std::function<void(unsigned char, const char *)> TSensorCallback;
+
 class BaseSensor {
 
     public:
@@ -79,8 +81,12 @@ class BaseSensor {
         // Number of available slots
         unsigned char count() { return _count; }
 
+        // Hook for event callback
+        void onEvent(TSensorCallback fn) { _callback = fn; };
+
     protected:
 
+        TSensorCallback _callback = NULL;
         unsigned char _sensor_id = 0x00;
         int _error = 0;
         bool _dirty = true;