Option to publish Dallas sensor address via MQTT (disabled by default)

code/espurna/config/sensors.h

@@ -161,8 +161,12 @@
 #define DALLAS_PIN                      14
 #endif
 
-#define DALLAS_RESOLUTION               9        // Not used atm
-#define DALLAS_READ_INTERVAL            2000     // Force sensor read & cache every 2 seconds
+#define DALLAS_RESOLUTION               9           // Not used atm
+#define DALLAS_READ_INTERVAL            2000        // Force sensor read & cache every 2 seconds
+
+#define DALLAS_PUBLISH_ADDRESSES        0           // Publish sensor addresses
+#define DALLAS_ADDRESS_TOPIC            "address"   // Topic to publish sensor addresses
+
 
 //------------------------------------------------------------------------------
 // DHTXX temperature/humidity sensor

code/espurna/sensor.ino

@@ -634,11 +634,23 @@ void sensorLoop() {
                         dtostrf(filtered, 1-sizeof(buffer), decimals, buffer);
 
                         #if MQTT_SUPPORT
+
                             if (SENSOR_USE_INDEX || (_counts[magnitude.type] > 1)) {
                                 mqttSend(_magnitudeTopic(magnitude.type).c_str(), magnitude.global, buffer);
                             } else {
                                 mqttSend(_magnitudeTopic(magnitude.type).c_str(), buffer);
                             }
+
+                            #if DALLAS_SUPPORT && DALLAS_PUBLISH_ADDRESSES
+                                if (magnitude.sensor->getID() == SENSOR_DALLAS_ID) {
+                                    if (SENSOR_USE_INDEX || (_counts[magnitude.type] > 1)) {
+                                        mqttSend(DALLAS_ADDRESS_TOPIC, magnitude.global, (((DallasSensor *) magnitude.sensor)->getAddress(magnitude.local)).c_str());
+                                    } else {
+                                        mqttSend(DALLAS_ADDRESS_TOPIC, (((DallasSensor *) magnitude.sensor)->getAddress(magnitude.local)).c_str());
+                                    }
+                                }
+                            #endif // DALLAS_SUPPORT && DALLAS_PUBLISH_ADDRESSES
+
                         #endif // MQTT_SUPPORT
 
                         #if INFLUXDB_SUPPORT

code/espurna/sensors/DallasSensor.h

@@ -170,6 +170,19 @@ class DallasSensor : public BaseSensor {
             return String(buffer);
         }
 
+        // Address of the device
+        String getAddress(unsigned char index) {
+            char buffer[20] = {0};
+            if (index < _count) {
+                uint8_t * address = _devices[index].address;
+                snprintf(buffer, sizeof(buffer), "%02X%02X%02X%02X%02X%02X%02X%02X",
+                    address[0], address[1], address[2], address[3],
+                    address[4], address[5], address[6], address[7]
+                );
+            }
+            return String(buffer);
+        }
+
         // Descriptive name of the slot # index
         String slot(unsigned char index) {
             _error = SENSOR_ERROR_OK;