int servoPin = A3;
Servo myServo;
int servoPos = 0;


void setup() {
    myServo.attach( A3 );
    
    Particle.function("servo", servoControl);
    
    Particle.variable( "servoPos" , &servoPos , INT );
}

void loop() {
}

int servoControl(String command){


    int newPos = command.toInt();
    servoPos = constrain( newPos, 0 , 180);
    
    myServo.write( servoPos );
    return 1;

}