Roomba Wake Up

/*
Roomba Wake Up

Sends an active low pulse to the DD (Device Detect) Pin of the Roomba
for 500msec to wake the Roomba up from the default power on sleep state

Roomba Serial Command Interface Specification at the following location:
http://www.ecsl.cs.sunysb.edu/mint/Roomba_SCI_Spec_Manual.pdf

Device Detect: ArduinoUno Digital pin 7 to Roomba pin 5 (black wire)
*/

int ddPin = 7;

// the setup function runs once when you press reset or power the board
void setup() {

  pinMode(ddPin,  OUTPUT);

  //Use Device Detect to wake Roomba
  digitalWrite(ddPin, HIGH);
  delay(100);
  digitalWrite(ddPin, LOW);
  delay(500);
  digitalWrite(ddPin, HIGH);
}

// the loop function runs over and over again forever
void loop() {

}