Pavel
6
You should search better 
There are tons of tutorials on how to use IR with Arduino:
https://www.google.com/search?q=ir+arduino&rlz=1CDGOYI_enUA591UA591&oq=ir+arduino&aqs=chrome..69i57j0l3&sourceid=chrome-mobile&ie=UTF-8&hl=en-US#imgrc=_
Start without Blynk:
Use Arduino IR library to record signals from your remote, then play it back. Make sure it works
Then add Blynk on top of it.
There is even a post on the forum:
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