add status topic and publish after sending text to sign

src/main.cpp

@@ -22,7 +22,8 @@ static SocketServer socketServer;
 
 WiFiClient client;
 Adafruit_MQTT_Client mqtt(&client, AIO_SERVER, AIO_SERVERPORT, AIO_USERNAME, AIO_KEY);
-Adafruit_MQTT_Subscribe mqtt_subscribe_topic = Adafruit_MQTT_Subscribe(&mqtt, "homeassistant/marquee_sign/text");
+Adafruit_MQTT_Subscribe mqtt_subscribe_topic = Adafruit_MQTT_Subscribe(&mqtt, "homeassistant/marquee_sign/text/set");
+Adafruit_MQTT_Publish mqtt_publish_topic = Adafruit_MQTT_Publish(&mqtt, "homeassistant/marquee_sign/text/status");
 
 void MQTT_connect();
 
@@ -79,6 +80,8 @@ void loop() {
         const char* signText = (char *)mqtt_subscribe_topic.lastread;
 
         sendTextToSign(signText);
+
+        mqtt_publish_topic.publish(signText);
     }
 }