Hi biwa,

I am assuming that you wish to get the BLE radio channel number used in the scan window as part of the advertisement report like in the lines of RSSI.

But as this information is not part of standard Bluetooth HCI event, this will need to be in a form of proprietary event format (like HCI vendor specific extensions).

I request you to create a github issue to start a discussion to define public API and its interface to HCI controller.

Regards,

Vinayak