Android Question BluetoothAdmin StartDiscovery Not Working in Samsung Android 11

[uniplan]

I have problems using bluetooth with a Samsung A20e device running android 11.
I tried to run the example shown at this link:

https://www.b4x.com/android/forum/threads/b4xpages-bluetooth-chat-example.119014/#content

but I always get the error:

"Error starting discovery process."

What can I do to fix?

 

[Erel]

Make sure that the location services are enabled.

 

[uniplan]

Now is OK.
Is there a way to check if the service is not active in order to prompt the user to activate it?

 

[Erel]

This is the best option: https://www.b4x.com/android/forum/threads/fusedlocationprovider-resolution-dialog.111652/#content