Hey vadimEL.
I've made some changes to your sketch file.
Now it's without RC-Timer, replaced with digital counter.
And it is NOT looked after client IP, but MAC Address.
MAC Address can be defined via the WEB Menu
There are several changes, but they are described in both the WEB Menu and in the code.
Your code has also been translated into English.
But try to look at the changes I've made.
Regards
Nico
wifi_immobilizer.ino (44.2 KB)