Servo

/*
 * IoT Servo example
 *
 * This example subscribe to the "servo" topic. When a message received, then it
 * change servo position
 *
 * Created 11 Sept 2017 by Heiko Pikner
 */
 
#include <Arduino.h>
#include <Servo.h>
#include <ittiot.h>
 
//Pin definition for the Servo (D3)
#define SERVO_PIN            D3
 
Servo myservo;  // create servo object to control a servo
 
// Change the servo position (value between 0 and 180)
// mosquitto_pub -u test -P test -t "ITT/iot/test1/servo" -m "51" = this calls servo motor to change position 
 
void iot_received(String topic, String msg)
{
  Serial.print("MSG FROM USER callback, topic: ");
  Serial.print(topic);
  Serial.print(" payload: ");
  Serial.println(msg);
 
  Serial.print("Servo: ");
  Serial.println(msg);
 
  myservo.write(msg.toInt());
}
 
// Function started after the connection to the server is established
void iot_connected()
{
  Serial.println("MQTT connected callback");
  // Subscribe to the topic "servo"
  iot.subscribe("servo");
  iot.log("IoT Servo example!");
}
 
void setup()
{
  Serial.begin(115200);
  Serial.println("Booting");
 
  // Print json config to serial
  iot.printConfig();
  // Initialize IoT library
  iot.setup();
 
  myservo.attach(SERVO_PIN);
}
 
void loop()
{
  // IoT behind the plan work, it should be periodically called
  iot.handle();
  delay(200);
}