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Example 2: Serial Triggering

This example uses the same setup for the arduino. The arduino listens to a serial port on your computer with a baud rate of 9600bps. Each time a value of 1 is sent to the serial port a trigger pulse is generated.
Trigger and blink on serial command.
// the setup function runs once when you press reset or power the board
void setup() {
pinMode(9, OUTPUT);
Serial.write("Extender Trigger Example \n")
// the loop function runs forever
void loop()
if (Serial.available() > 0)
int value =;
if (value == 1) {
digitalWrite(9, HIGH);
digitalWrite(9, LOW);
else {
Serial.write("Undefined Input\n");