#include <IRremote.h>
#include <LiquidCrystal_I2C.h>

#define relay1 17
#define relay2 19
#define relay3 18
#define relay4 5
#define recv 4

IRrecv recv_pin(recv);
LiquidCrystal_I2C lcd(0x27, 20, 4);

void setup() {
  pinMode(relay1, OUTPUT);
  pinMode(relay2, OUTPUT);
  pinMode(relay3, OUTPUT);
  pinMode(relay4, OUTPUT);
  lcd.init(); 
  lcd.backlight(); 
  //write code to enable the IR receiver here
  recv_pin.enableIRIn();
  recv_pin.blink13(true);
}

void loop() {
  lcd.setCursor(0, 0);
  lcd.print("Status:");

  if(recv_pin.decode()){

    //write code to store the decoded IR receiver data in response variable
    //int response=recv_pin.decodedIRData.command;
    String response = String(recv_pin.decodedIRData.command);

    if(response=="48") { // NUM 1 BUTTON
      digitalWrite(relay1, HIGH);
      lcd.setCursor(0, 2);
      lcd.print("LED1 ON");
    }
    else if(response=="24"){ //NUM 2 BUTTON
      digitalWrite(relay2, HIGH);
      lcd.setCursor(0, 2);
      lcd.print("LED2 ON");
    }
    else if(response=="122"){ // NUM 3 BUTTON
      digitalWrite(relay3, HIGH);
      lcd.setCursor(0, 2);
      lcd.print("LED3 ON");
    }
    else if(response=="16"){ // NUM 4 BUTTON
      digitalWrite(relay4, HIGH);
      lcd.setCursor(0, 2);
      lcd.print("LED4 ON");
    }
    else if(response=="162"){ //POWER OFF BUTTON
      digitalWrite(relay1, LOW);
      digitalWrite(relay2, LOW);
      digitalWrite(relay3, LOW);
      digitalWrite(relay4, LOW);
      lcd.setCursor(0, 2);
      lcd.print("LEDS OF");
    }
  recv_pin.resume();
  }
}