#include <String.h>
#include <Servo.h>
Servo sv1;
Servo sv2;
String PTangle, kari;
unsigned int ang;

void setup() {
  Serial.begin(9600);
  pinMode(13, OUTPUT);
  digitalWrite(13, LOW);
  sv1.attach(9);
  sv2.attach(10);
  sv1.write(85);
  sv2.write(90);
}

void loop() {
  if (Serial.available() > 0) {
    PTangle = Serial.readStringUntil("\n");
    kari = PTangle.substring(1);
    ang = kari.toInt();
    if (ang >= 10 && ang <= 180) {
      if (PTangle.startsWith("p")) {
        ptang(sv1, ang);
      } else if (PTangle.startsWith("t")) {
        ptang(sv2, ang);
      }
    }
  }
}

void ptang(Servo x, int y) {
  digitalWrite(13, HIGH);
  x.write(y);
  delay(300);
  digitalWrite(13, LOW);
}