IRremote library problem (ver 4.4.0)

Development Libraries
1

I'm creating a timer. Pressing a button requires it to switch. However, if you press the same button on the remote control, the signals will be different. Example: 21, 0, 21, 0.
4 presses - different answers.
Console:
Decoded Raw Data: 21

Protocol=NEC Address=0x0 Command=0x15 Raw-Data=0xEA15FF00 32 bits LSB first

Decoded Raw Data: 0

Protocol=UNKNOWN Hash=0x0 1 bits (incl. gap and start) received

Decoded Raw Data: 21

Protocol=NEC Address=0x0 Command=0x15 Raw-Data=0xEA15FF00 32 bits LSB first

Decoded Raw Data: 21

Protocol=NEC Address=0x0 Command=0x15 Raw-Data=0xEA15FF00 32 bits LSB first

Decoded Raw Data: 21

2

Welcome to the forum

Please follow the advice given in the link below when posting code, in particular the section entitled 'Posting code and common code problems'

Use code tags (the < CODE/ > icon above the compose window) to make it easier to read and copy for examination

https://forum.arduino.cc/t/how-to-get-the-best-out-of-this-forum

In my experience the easiest way to tidy up the code and add the code tags is as follows
Start by tidying up your code by using Tools/Auto Format in the IDE to make it easier to read. Then use Edit/Copy for Forum and paste what was copied in a new reply. Code tags will have been added to the code to make it easy to read in the forum thus making it easier to provide help.

3

I see 3 equal signals on your post.