Dear Mr. Rui,

I was trying IR Remote with ESP 8266. with following Sketch

/*
* https://github.com/markszabo/IRremoteESP8266/blob/master/examples/IRrecvDemo/IRrecvDemo.ino
* IRremoteESP8266: IRrecvDemo - demonstrates receiving IR codes with IRrecv
* An IR detector/demodulator must be connected to the input RECV_PIN.
* Copyright 2009 Ken Shirriff, http://arcfn.com
* Changes:
* Version 0.2 June, 2017
* Changed GPIO pin to the same as other examples.
* Used our own method for printing a uint64_t.
* Changed the baud rate to 115200.
* Version 0.1 Sept, 2015
* Based on Ken Shirriff's IrsendDemo Version 0.1 July, 2009
*/
#ifndef UNIT_TEST
#include <Arduino.h>
#endif
#include <IRremoteESP8266.h>
#include <IRrecv.h>
#include <IRutils.h>
// An IR detector/demodulator is connected to GPIO pin 14(D5 on a NodeMCU
// board).
uint16_t RECV_PIN = 14;
IRrecv irrecv(RECV_PIN);
decode_results results;

void setup() {
  Serial.begin(115200);
  irrecv.enableIRIn(); // Start the receiver
}

void loop() {
  if (irrecv.decode(&results)) {
    // print() & println() can't handle printing long longs. (uint64_t)
    serialPrintUint64(results.value, HEX);
    Serial.println("");
    irrecv.resume(); // Receive the next value
  }
  delay(100);
}

On pressing EN button the out put on serial port was some garbage. there was no any out put on serial port on pressing any button on Remote control. I used Panasonic LED TV Remote