[question] can only use Bluethooth tab on Xiaomi Note 7 with location enabled

[chibbi]

Describe the bug
I just bought the Xiaomi Mi Body Composition Scale 2, which i intended to use with openScale. Now i opened openScale for the first time (downloaded it a few days ago), to pair the scale with openScale. But when i try to open the Bluethooth tab i get the error, to be seen in Debug log. The error seems to say "i want your location", but that doesn't make any sense in my mind, cause why on earth should an app ask for my location when using bluethooth.

Btw. enabling the location "fixed" the issue, but i still don't understand why that is even necessary.

So my Question is:
Why does the app need my location to find a bluethooth device.

Reproduced with latest dev version: latest f-droid build

Debug log

Build version: 2.4.6 
Build date: 1981-01-01 01:01:02 
Current date: 2022-10-11 21:57:10 
Device: Xiaomi Redmi Note 7 
OS version: Android 10 (SDK 29) 
 
Stack trace:  
java.lang.SecurityException: app does not have ACCESS_FINE_LOCATION permission, cannot start scan
	at com.welie.blessed.BluetoothCentralManager.permissionsGranted(BluetoothCentralManager.java:878)
	at com.welie.blessed.BluetoothCentralManager.bleNotReady(BluetoothCentralManager.java:838)
	at com.welie.blessed.BluetoothCentralManager.startScan(BluetoothCentralManager.java:405)
	at com.welie.blessed.BluetoothCentralManager.scanForPeripherals(BluetoothCentralManager.java:515)
	at com.health.openscale.gui.preferences.BluetoothSettingsFragment.startBluetoothDiscovery(BluetoothSettingsFragment.java:142)
	at com.health.openscale.gui.preferences.BluetoothSettingsFragment.onResume(BluetoothSettingsFragment.java:103)
	at androidx.fragment.app.Fragment.performResume(Fragment.java:3071)
	at androidx.fragment.app.FragmentStateManager.resume(FragmentStateManager.java:605)
	at androidx.fragment.app.FragmentStateManager.moveToExpectedState(FragmentStateManager.java:285)
	at androidx.fragment.app.SpecialEffectsController$FragmentStateManagerOperation.complete(SpecialEffectsController.java:771)
	at androidx.fragment.app.SpecialEffectsController$Operation.completeSpecialEffect(SpecialEffectsController.java:690)
	at androidx.fragment.app.DefaultSpecialEffectsController$SpecialEffectsInfo.completeSpecialEffect(DefaultSpecialEffectsController.java:855)
	at androidx.fragment.app.DefaultSpecialEffectsController.startAnimations(DefaultSpecialEffectsController.java:154)
	at androidx.fragment.app.DefaultSpecialEffectsController.executeOperations(DefaultSpecialEffectsController.java:123)
	at androidx.fragment.app.SpecialEffectsController.executePendingOperations(SpecialEffectsController.java:306)
	at androidx.fragment.app.FragmentManager.executeOpsTogether(FragmentManager.java:1853)
	at androidx.fragment.app.FragmentManager.removeRedundantOperationsAndExecute(FragmentManager.java:1764)
	at androidx.fragment.app.FragmentManager.execPendingActions(FragmentManager.java:1701)
	at androidx.fragment.app.FragmentManager$4.run(FragmentManager.java:488)
	at android.os.Handler.handleCallback(Handler.java:883)
	at android.os.Handler.dispatchMessage(Handler.java:100)
	at android.os.Looper.loop(Looper.java:224)
	at android.app.ActivityThread.main(ActivityThread.java:7590)
	at java.lang.reflect.Method.invoke(Native Method)
	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:539)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:950)

[chibbi]

Welp, found the information in FaQ....