#define DECODE_NEC
#include <IRremote.hpp>

/*
*  Press 0 to turn the LED on
*/

constexpr uint8_t IR_RECV_PIN {3};
constexpr uint8_t RELAY_PIN {2};
constexpr uint16_t TOGGLE_BTN = 0x68; // IR command to toggle LED via relay

void setup() {
  Serial.begin(115200);

  pinMode(RELAY_PIN, OUTPUT);
  digitalWrite(RELAY_PIN, LOW);  // Relay OFF

  IrReceiver.begin(IR_RECV_PIN);
  Serial.println("IR Receiver ready");
}

void loop() {
  if (IrReceiver.decode()) {
    IrReceiver.printIRResultShort(&Serial);

    if (IrReceiver.decodedIRData.protocol == NEC ||
        IrReceiver.decodedIRData.protocol == NEC2) {

      uint16_t cmd = IrReceiver.decodedIRData.command;
      if (cmd == TOGGLE_BTN) {
        digitalWrite(RELAY_PIN, !digitalRead(RELAY_PIN)); // Toggle relay
        Serial.println("LED via relay toggled!");
      }
    }
    IrReceiver.resume();
  }
}