3 Relays + Serial input

3RelaySerial.ino

/*
Pins, 13-11 connected to relays
serial input 1-3 to toggle relay on for 2 seconds

from Tom Igoe's RGB Serial example
This example code is in the public domain.
 */

// pins for the LEDs:
const int pinA = 13;
const int pinB = 12;
const int pinC = 11;

long pinATime = 0;
long pinBTime = 0;
long pinCTime = 0;

int interval = 2000;

void setup() {
  // initialize serial:
  Serial.begin(9600);
  // make the pins outputs:
  pinMode(pinA, OUTPUT); 
  pinMode(pinB, OUTPUT); 
  pinMode(pinC, OUTPUT); 

}

void loop() {

  unsigned long currentMillis = millis();

  if(currentMillis - pinATime > interval) {
    digitalWrite(pinA, LOW);
  } 
  
  if(currentMillis - pinBTime > interval) {
    digitalWrite(pinB, LOW);
  }
  
  if(currentMillis - pinCTime > interval) {
    digitalWrite(pinC, LOW);
  }

  // if there's any serial available, read it:
  while (Serial.available() > 0) {
    int number = Serial.parseInt();

    if (Serial.read() == '\n') {
      Serial.println(number);
      if (number == 1) {
        digitalWrite(pinA, HIGH);
        pinATime=currentMillis;
      }

      if (number == 2) {
        digitalWrite(pinB, HIGH);
        pinBTime=currentMillis;
      }

      if (number == 3) {
        digitalWrite(pinC, HIGH);
        pinCTime=currentMillis;
      }

    }

  }


}

processingSerialWrite.pde

/**
 * Simple Write. 
 * 
 * Check if the mouse is over a rectangle and writes the status to the serial port. 
 * This example works with the Wiring / Arduino program that follows below.
 */


import processing.serial.*;

Serial myPort;  // Create object from Serial class
int val;        // Data received from the serial port

void setup() 
{
  size(200, 200);
  // I know that the first port in the serial list on my mac
  // is always my  FTDI adaptor, so I open Serial.list()[0].
  // On Windows machines, this generally opens COM1.
  // Open whatever port is the one you're using.
  println(Serial.list());
  String portName = Serial.list()[4];
  myPort = new Serial(this, portName, 9600);
}

void draw() {
  background(255);
  if (mouseOverRect() == true) {  // If mouse is over square,
    fill(204);                    // change color and
    myPort.write("1\n");              // send an H to indicate mouse is over square
//    myPort.write(11);
  } 
//  else {                        // If mouse is not over square,
//    fill(0);                      // change color and
//    myPort.write(2);              // send an L otherwise
//  }
  rect(50, 50, 100, 100);         // Draw a square
}

boolean mouseOverRect() { // Test if mouse is over square
  return ((mouseX >= 50) && (mouseX <= 150) && (mouseY >= 50) && (mouseY <= 150));
}


/*
  // Wiring/Arduino code:
 // Read data from the serial and turn ON or OFF a light depending on the value
 
 char val; // Data received from the serial port
 int ledPin = 4; // Set the pin to digital I/O 4
 
 void setup() {
 pinMode(ledPin, OUTPUT); // Set pin as OUTPUT
 Serial.begin(9600); // Start serial communication at 9600 bps
 }
 
 void loop() {
 if (Serial.available()) { // If data is available to read,
 val = Serial.read(); // read it and store it in val
 }
 if (val == 'H') { // If H was received
 digitalWrite(ledPin, HIGH); // turn the LED on
 } else {
 digitalWrite(ledPin, LOW); // Otherwise turn it OFF
 }
 delay(100); // Wait 100 milliseconds for next reading
 }
 
 */