What does 'Type: UNKNOWN' mean in the Master Control Panel app?

[Tim]

In the Androir master control panel app, in the scanner results there is a 'Type:' line for each device. Most of them around me say 'UNKNOWN' however some say 'BLE only'. I would have assumed it depends on the BrEdrNotSupported flag, but most devices have GeneralDescoverable | BrEdrNotSupported, yet some are 'UNKNOWN' and some are 'BLE only'.

From my scan through the list it looks like if the device doesn't have its name in the advertising packet it gets 'Type: UNKNOWN'. Why is that?

[Stian Røed Hafskjold]

This is from the Android API. The method getType() in BluetoothDevice returns the type.

Not sure why android reports UNKNOWN. I tried with two different devices with the exact same advertising data and flags, one showed "BLE Only" and the other "UNKNOWN". So I don't think it has to do with the packet data or flags.

[Tim]

Interesting. The code for getType() is here. It eventually ends up here so Android is just passing on what the hardware says. Mysterious.

[Tim]

I posted a question on StackOverflow to see if anyone there knows.

[yuyuheqiu]

I have the same question，most time the nRF Master Control display Type：UNKOWN. I check the BLE 4.0 advertise protocal, my Advinterval is setted to 1000ms.Accroding to the protocal,there is no problem.