arduino-mqtt-payload-decode.h

arduino-mqtt-payload-decode.h

void callback(char* topic, byte* payload, unsigned int length) {
  
  Serial.print("Message arrived [");
  Serial.print(topic);

  char message[length + 1];
  
  // copy contents of payload to message
  memcpy(message, payload, length);

  // add NULL terminator to message, making it a correct c string
  message[length + 1] = '\0';
  
  Serial.println("Message complet : ");
  Serial.println(message);
  Serial.println("...");


}

servo.h

void callback(char* topic, byte* payload, unsigned int length) {
  
  Serial.print("Message arrived ["); 
  Serial.print(topic);
  Serial.print("] ");
  Serial.println();

  char message[length + 1];
  
  // copy contents of payload to message
  memcpy(message, payload, length);

  // add NULL terminator to message, making it a correct c string
  message[length + 1] = '\0';

  // we convert our message into a proper String 
  String myMsg = message;


  Serial.println("Complete msg : ");
  Serial.print(message);
  Serial.println();
  
  // We convert our String to int and send it to the servo 
  Servo1.write( myMsg.toInt() );


}