Teensy Serial Controller

simpleserial.ino

/******
 * Teensy connected to Powerswitch Tail 2
 */

#define PST_1   3 //powerswitch tail pin 1
#define PST_2   4 //powerswitch tail pin 2
#define LED     13 //teensy 3.0 on-board LED

void setup() {
  Serial.begin(9600);
  
  // put your setup code here, to run once:
  pinMode(PST_1, OUTPUT); //control pin
  digitalWrite(PST_2, LOW); //start at OFF
  
  pinMode(PST_2, OUTPUT); //pull low
  digitalWrite(PST_2, LOW); //keep this LOW
  
  pinMode(LED, OUTPUT); //on board LED
  digitalWrite(LED, HIGH); //LED on so we know it's running  
}

void loop() {
  
  if(Serial.available()){
    char cmd = Serial.read();
    switch(cmd){
      case '1': // turn on powerswitch tail
        digitalWrite(PST_1, HIGH);
        blinkLed();
        break;
      case '0': // turn off powerswitch tail
        digitalWrite(PST_1, LOW);
        blinkLed();
        break;
    }
  }
}

void blinkLed(){
  // so that we know a command was sent to the PST
  digitalWrite(LED, LOW);
  delay(500);
  digitalWrite(LED, HIGH);
}