wifi signal strength

src/main.cpp

@@ -71,6 +71,7 @@ struct __attribute__((packed)) sensor_readings_t {
   float temperature_max = NAN; // °C
   float temperature_min = NAN; // °C
   int battery = 0;
+  int8_t rssi = 0;
   uint32_t lastUpdate = 0;
 } sensor_readings;
 
@@ -208,6 +209,7 @@ void getSensorMeasurements() {
   }
 
   sensor_readings.battery = analogRead(_VBAT);
+  sensor_readings.rssi = WiFi.RSSI();
 
   sensor_readings.lastUpdate = millis();
 }
@@ -488,6 +490,7 @@ void printValues() {
     Serial.println(sensor_readings.pm10);
   }
 
+  Serial.print("RSSI: "); Serial.println(sensor_readings.rssi);
   Serial.print("Battery: "); Serial.println(sensor_readings.battery);
 
   Serial.print("Free HEAP: "); Serial.println(ESP.getFreeHeap());
@@ -550,6 +553,12 @@ void sendValues() {
     delay(10);
   }
 
+  {
+    String topic_rssi = String("thomas/sensor/") + ota.getMAC() + String("/rssi");
+    mqtt.publish(topic_rssi.c_str(), sensor_readings.rssi, "%d");
+    delay(10);
+  }
+
 }
 
 /**