New Mi4s 7.6.10 Bluetooth Trouble

Jun 15, 2017
So, i can't connect OBD2 scanner. Connection failed, and can't see window for input PIN.

Scanner 100% work on other device (ASUS and Samsung), and it work when i not delete it.
I delete accidentally it from my bluetooth connection and i dont know, what can i do now.

And all bluetooth devices with connection PIN i can't use.