servoSerial.ino

#include <Servo.h>
Servo myservo;  // create servo object to control a servo
int servoPos;

void setup() {
  //start serial communication at 9600baud (pulses per second)
  Serial.begin(9600);
  myservo.attach(9);  // attaches the servo on pin 9 to the servo object
}

void loop() {
  //check if there's anything in Serial RX
  if (Serial.available() > 0) {
    servoPos = Serial.readStringUntil("\n").toInt();
    myservo.write(servoPos);// tell servo to go to position 0-180
  }
}