// Arduino IDE:
// File -> Examples -> 04.Communication -> PhysicalPixel

#define myservo 5 // the pin the servo is on
int incomingByte;      // variable stores  serial data

void setup() {
  // initialize serial communication:
  Serial.begin(115200);
  // initialize the LED pin as an output:
  pinMode(myservo, OUTPUT);
}

void loop() {
  // see if there's incoming serial data:
  if (Serial.available() > 0) {
    // read the oldest byte in the serial buffer:
    incomingByte = Serial.read();
    // if it's a capital H (ASCII 72), turn on the LED:
    if (incomingByte == 'H') {
      for (int x = 0; x < 50; x++) {
        digitalWrite(myservo, HIGH);
        delayMicroseconds(500);
        digitalWrite(myservo, LOW);
        delayMicroseconds(19500);
      }
      Serial.println("Getting H"); //print out to serial monitor to check state
    }
    // if it's an L (ASCII 76) turn off the LED:
    if (incomingByte == 'L') {
      for (int x = 0; x < 50; x++) {
        digitalWrite(myservo, HIGH);
        delayMicroseconds(2500);
        digitalWrite(myservo, LOW);
        delayMicroseconds(17500);
      }
      Serial.println("Getting L"); //print out to serial monitor to check state
    }
  }
}