added example to read data from MQTT Server

src/connections.cpp

@@ -64,6 +64,11 @@ void onMqttConnect(bool sessionPresent)
   uint16_t packetIdSub = mqttClient.subscribe(MQTT_PATH_SUB, 2);
   Serial.print("subscribed to: ");
   Serial.println(MQTT_PATH_SUB);
+
+  //Testing read
+  uint16_t packetIdSub2 = mqttClient.subscribe("smartgarden/updates/esp-sebastian/brightness", 2);
+  Serial.print("also subscribed to: ");
+  Serial.println("smartgarden/updates/esp-sebastian/brightness");
 }
 
 void onMqttDisconnect(AsyncMqttClientDisconnectReason reason)
@@ -103,6 +108,18 @@ void onMqttMessage(char *topic, char *payload, AsyncMqttClientMessageProperties
     Serial.println(topic);
     toggleValve();
   }
+
+  //Testing reading
+  String messageTemp;
+	for (int i = 0; i < len; i++) {
+		//Serial.print((char)payload[i]);
+		messageTemp += (char)payload[i];
+	}
+  if (strcmp(topic, "smartgarden/updates/esp-sebastian/brightness") == 0) {
+    Serial.println("### Received brightness value: ###");
+    Serial.println(messageTemp);
+	}
+
 }
 
 void onMqttPublish(uint16_t packetId)
@@ -135,4 +152,4 @@ void setupConnections()
 
 void publishMessage(const char *topic, const char *msg) {
   mqttClient.publish(topic, 1, true, msg);
-}
+}

src/header.h

@@ -17,6 +17,10 @@
 #include <AutoConnect.h>
 #include <AsyncMqttClient.h>
 
+// BH1750 lightsensor
+#define MIN_LIGHT 0
+#define MAX_LIGHT 54612
+
 // DHT11
 #define PIN_DHT11 14