public class MQTTHelper {
    public MqttAndroidClient mqttAndroidClient;
    public final String[] arrayTopics = {
      "nathan0793/feeds/adc-temperature", 
      "nathan0793/feeds/adc-intensity",
      "nathan0793/feeds/adc-humidity",
      "nathan0793/feeds/btnled",
      "nathan0793/feeds/btnbump",
      "nathan0793/feeds/ackled"
    };
    
    final String clientId = "12342678"; // Set a random number -- Must change if more than 1 person use in same Local Network
    final String username = "nathan0793"; // Setup follow your adafruit server --> Check the picture as below
    final String password = "aio_NiAy21S9CrBFkhvy5DkKgyjWIa8Q"; // Setup follow your adafruit server --> Check the picture as below


//...}