#include <Servo.h>

Servo myservo;  // create servo object to control a servo
// twelve servo objects can be created on most boards

int pos = 0;    // variable to store the servo position

void setup() {
  myservo.attach(9);  // attaches the servo on pin 9 to the servo object


  Serial.begin(9600);    //start serial communication @9600 bps
  }

void loop(){
  
  if(Serial.available()){  //id data is available to read

    char val = Serial.read();

    if(val == 'C'){       //if C received
      myservo.write(170); ; //servo motor moves to 170 degree position
      }
    if(val == 'O'){       //if O received
      myservo.write(0); ; //servo motor moves to 0 degree position
      }
    if(val == 'F'){       //if F received
      myservo.write(170); //servo motor moves to 170 degree position
      delay(500);  //servo motor hold position for 0.5 sec
      myservo.write(0); //servo motor moves to 0 degree position
      }   
    }
  }