#include <Servo.h>
Servo servo;
int min = 0;
int max = 180;
int panDelay = 100;

void setup() {
  Serial.begin(9600);    // start serial port at 9600 bps:
  pinMode(13, OUTPUT);
  digitalWrite(13, LOW);
  servo.attach(2, min, max);
  servo.write(90);
}

void loop() {

  String line;
    while( Serial.available()) {  // buffer up a line
      char c;
      c = Serial.read();
      line = line + c;
     }
     line = line.trim();
     Serial.flush();

    if (line.indexOf('ON') >= 0) {
        Serial.println("Setting on");
        digitalWrite(13, HIGH);
        moveTo(max);

    }

    if (line.indexOf('OFF') >= 0) {
        Serial.println("Setting off");
        digitalWrite(13, LOW);
        moveTo(min);
    }

    if (line.indexOf('q') >= 0) {
        Serial.println("Down");
        moveTo(servo.read() - 10);
    }

    if (line.indexOf('w') >= 0) {
        Serial.println("Up");
        moveTo(servo.read() + 10);
    }

    delay(1000);
    Serial.print(".");
}


void moveTo(int dest) {

   int current = servo.read();
   while (current < dest && dest <= max) {
       current = current + 1;
       Serial.print("Current: ");
       Serial.println(current, DEC);
       servo.write(current);
       delay(panDelay);
   }

    while (current > dest && dest >= min) {
      current = current - 1;
      Serial.print("Current: ");
      Serial.println(current, DEC);
      servo.write(current);
      delay(panDelay);
   }

}