fix: the buttons can't be built

[kklds]

Connect to Bluetooth but the error [log] Device not found !, the buttons can't be built, and the phone has these buttons

[chan150]

I did not fully understand above issue.
To be addressed, let me know details to be clear.

1. Working properly on mobile (FBP)?
2. Does not work for Windows?
3. What kinds of function are not working? (e.g., scan, connect, discover services)
4. did you call discover services before building widget?
5. did you call setState((){}) before states are changed?

[kklds]

1.mobile(FBP) has no problem
2.It can be used on Windows
3.All three functions are fine
4.discover services carried out
5.The features on the mobile device are all built normally.I don't think it has anything to do with this setState((){}).
The code I'm using is also in the case.My bluetooth device ED01 has a write feature, ED02 has a notification feature, ED10 has a read feature, I used discover services, but none of these features are built on windows.