Android Question Capture buttons from a Bluetooth audio device

[yo3ggx]

Hello,

I have a Bluetooth audio device (mic+speaker) with 3 more buttons.
Tried to capture following intents using BroadcastReceiver:
"android.intent.action.MEDIA_BUTTON"
"android.bluetooth.headset.action.VENDOR_SPECIFIC_HEADSET_EVENT"
Tried to request AudioFocus and start a mediaplayer ( as proposed in another thread).
Still nothing in BroadcastReceiver.

Anyone succeed to read buttons status from a Bluetooth audio device or headset in B4A?

Thank you