int servoPin = A3;
Servo servo;
bool servoPositionUpdated = false;
int servoPos = 0;

void setup() {
    
    servo.attach(servoPin);
    Particle.function("position", setPosition);
}

void loop() {
    
    if (servoPositionUpdated == true){
        servo.write(servoPos);
        servoPositionUpdated = false;
    }
    
}


int setPosition (String cmd) {
    
    int input = cmd.toInt(); 
    if (input > 180) {
        return -1;
    }
    if (input < 0) {
        return -1;
    }
    int angle = map(input, 15, 0, 0, 90); // map the input value to rotaton angle
    servoPos = angle;
    servoPositionUpdated = true;
    return 1;
}