#include <IRremote.h>

#define IRpin 14   
IRrecv receiver(IRpin);
const int relayPins[] = {21, 19, 16, 15};  

void setup() {
  Serial.begin(9600);
  receiver.enableIRIn(); 
  
  // Set up relay pins
  for (int i = 0; i < 4; i++) {
    pinMode(relayPins[i], OUTPUT);
    digitalWrite(relayPins[i], LOW);  // Turn off relays initially
  }
}

void loop() {
  // Checks received an IR signal
  if (receiver.decode()) {
    translator();
    receiver.resume();  // Receive the next value
  }
}

void translator() {
  // Takes command based on IR code received
  switch (receiver.decodedIRData.command) {
    case 48:
      operateRelay(0);
      break;
    case 24:
      operateRelay(1);
      break;
    case 122:
      operateRelay(2);
      break;
    case 74:
      operateRelay(3);
      break;
    default:
      Serial.println("Button has no Function");
  }
}

void operateRelay(int relayIndex) {
  // Toggle the relay
  digitalWrite(relayPins[relayIndex], !digitalRead(relayPins[relayIndex]));
  
  // Print the status to serial
  Serial.print("Button Pressed - Relay Number: ");
  Serial.println(relayIndex + 1);
}