// from : https://www.hackster.io/electroboy001/ir-remote-decoder-using-arduino-nano-d83505
#include <IRremote.h>
#define IR_RECEIVE_PIN 2

void setup() {
  Serial.begin(9600);
  IrReceiver.begin(IR_RECEIVE_PIN);
}

void loop() {
  if (IrReceiver.decode()) {
    Serial.print(IrReceiver.decodedIRData.command);
    Serial.print(" : ");
    Serial.println(IrReceiver.decodedIRData.decodedRawData, HEX);
    IrReceiver.resume();
  }
}