/*##############################################################################
 Author:
 * Mirko Prosseda (06-2013)
 * email: mirko.prosseda@gmail.com
 
 Description:
 * Relay Shield test sketch v1.0
 * Turns on and off each relay every second.

 Connections:
 * SHIELD  -> ARDUINO
 * Relay 1 -> 5
 * Relay 2 -> 6
 * Relay 3 -> 7
 * Relay 4 -> 8
 * During programming, switch must be on PRG position
##############################################################################*/


// Define constants and variables
const int out1 = 5; // define Arduino pin connected to relay 1
const int out2 = 6; // define Arduino pin connected to relay 2
const int out3 = 7; // define Arduino pin connected to relay 3
const int out4 = 8; // define Arduino pin connected to relay 4


// Initialization
void setup() 
{                
  pinMode(out1, OUTPUT); // initialize the digital pin as an output     
  pinMode(out2, OUTPUT); // initialize the digital pin as an output
  pinMode(out3, OUTPUT); // initialize the digital pin as an output
  pinMode(out4, OUTPUT); // initialize the digital pin as an output
  Serial.begin(9600);    // Serial Port initialization
}

// enable or disable a relay (1 to 4)
void setRelay(int relay, int value)
{
  if(relay > 0 && relay < 5) digitalWrite((relay + 4), value);
}

// main loop
void loop() 
{
  setRelay(1, 1);                        // enable relay 1
  Serial.print("Relay 1: Enabled ... ");
  delay(1000);                           // wait for a second
  setRelay(1, 0);
  Serial.println("Disabled");            // disable relay 1
  delay(1000);                           // wait for a second
  setRelay(2, 1);                        // enable relay 2
  Serial.print("Relay 2: Enabled ... ");
  delay(1000);                           // wait for a second
  setRelay(2, 0);                        // disable relay 2
  Serial.println("Disabled");
  delay(1000);                           // wait for a second
  setRelay(3, 1);                        // enable relay 3
  Serial.print("Relay 3: Enabled ... ");
  delay(1000);                           // wait for a second
  setRelay(3, 0);                        // disable relay 3
  Serial.println("Disabled");
  delay(1000);                           // wait for a second
  setRelay(4, 1);                        // enable relay 4
  Serial.print("Relay 4: Enabled ... ");
  delay(1000);                           // wait for a second
  setRelay(4, 0);                        // disable relay 4
  Serial.println("Disabled");
  delay(1000);                           // wait for a second
}