QT 5.15.2 BLE how to fix QLowEnergyService::UnknownError on Windows?

Question

Bluetooth

Experience with Qt is only about a week, I tried to write a program to work with a BLE device (LYWSD02MMC clock from Xiaomi) and ran into a problem reading the service.

I wrote a program based on Qt examples that run and work fine (in particular, LowEnergyScanner), but it is my program that refuses to work. I googled the problem, and it turned out that maybe the problem is in Windows, and indeed, I installed Ubuntu 20.10, the program starts there and reads the service normally.
And the bug on Windows is that it throws the error "the process cannot access the file because it is being used by another process". Although the same error occurs even if you restart the computer (well, suddenly the process is stuck somehow).

Header - https://pastebin.com/04mnYQZr
Code -https://pastebin.com/ufRefgxE

Trying to read service


File is in use by another process


Running on Ubuntu

Answer 1

Try starting the system in safe mode so that unnecessary software is not loaded from autorun, perhaps some utility from the manufacturer of your Bluetooth adapter is interfering. And Qt has nothing to do with it, most likely, if this code works on Linux.