/* BASIC RELAY TIMER
 ***************************************************
 * WIRING:
 * 5v pin on the Arduino to VCC on the relay board
 * GND pin on the Arduino to GND on the relay board
 * Pin 7 on the Arduino to IN on the relay board
 ***************************************************
 * FUNCTION:
 * The Arduino LED (connected to pin 13)will flash briefly 
 * to indicate the relay is on, at the same time the relay
 * will turn ON. 
 * 
 * After aproximatley 1 sec the relay will turn OFF
 * for about 1 sec then the cycle will repeat.
 * 
 * If you open the Serial Port at 9600 Baud:
 * You will see a text confirmation of when the relay is ON / OFF
 * You will also see the TX Led flash briefly when the serial lines are sent.
 */

// Declare Pins
int relayPin = 7;
int ledPin = 13;

// the setup function runs once when you press reset or power the board
void setup() {
  // Open the Serial port to (9600 Baud)
  Serial.begin(9600);
  // initialize digital pin 13 (ledPin) as an output.
  pinMode(relayPin, OUTPUT);
  pinMode(ledPin, OUTPUT);
  // Set the relay pin to HIGH which holds the relay OFF
  digitalWrite(relayPin, HIGH);
}

// The loop runs over and over again until the arduino is re-programmed 
void loop() {
  digitalWrite(ledPin, HIGH);   // The LED is On
  digitalWrite(relayPin, LOW);   // The Relay is On
  Serial.println("The Relay is ON");
  delay(350);                       // Led delay
  digitalWrite(ledPin, LOW);  // The LED is Off
  delay(650);  // Relay interval
  digitalWrite(relayPin, HIGH);   // The Relay is Off
  Serial.println("The Relay is OFF");
  delay(1000);                       // wait for a second
}

/* INTERMEDIATE RELAY PROGRAM
 ***************************************************
 * WIRING:
 * 5v pin on the Arduino to VCC on the relay board
 * GND pin on the Arduino to GND on the relay board
 * Pin 7 on the Arduino to IN on the relay board
 ***************************************************
 * FUNCTION:
 * The Arduino LED (connected to pin 13)will flash briefly 
 * when the Relay is on.
 *
 * Open the Serial monitor (9600 baud)
 * Type 1 to turn the relay ON
 * Type 0 to turn the relay OFF
 * 
 * You will see a text confirmation of when the relay is ON / OFF
 * You will also see the TX Led flash briefly when the serial lines are sent.
*/


// Declare Pins
int relayPin = 7;
int ledPin = 13;

void setup() {
  // Start Serial at 9600 baud
  Serial.begin(9600);

  // Set the relayPin as an OUTPUT
  pinMode(relayPin, OUTPUT);
  pinMode(ledPin, OUTPUT);
  
  // Set the relayPin HIGH to hold the relay OFF
  digitalWrite(relayPin, HIGH);
  
 // Acknowledge the program
  Serial.println("PROGRAM READY");
  Serial.println("");
}

// The loop runs over and over again until the arduino is re-programmed
void loop() {
  while (Serial.available()) {
    char inChar = (char)Serial.read();
    if (inChar == '1') {
      digitalWrite(relayPin, LOW); // Turn the Relay ON
      Serial.println("RELAY ON");
    }
    else if (inChar == '0') {
      digitalWrite(relayPin, HIGH); // Turn the Relay OFF
      Serial.println("RELAY OFF");
    }
    else if (inChar != 1 && inChar != 0){
      Serial.println ("Command not recognised"); 
    }
  }
}