help understanding Bluetooth Scanning

[RedBullet]

So when i start scanning for Bluetooth devices like:

Code: Select all

bluetoothctl
scan on

and I get a bunch of MAC addresses. I realize these are all Bluetooth devices "nearby" but what am I actually seeing?

Is it only showing devices that are in "discovery" mode?

[Douglas6]

You are actually seeing two different types of devices:
1. Any classic Bluetooth devices which are in discoverable mode. Shouldn't be that many, unless you explicitly put them in discoverable mode.
2. Any BLE devices that are advertising. That will be the great majority of BLE devices within range.