How to discover unpaired Bluetooth devices in a Windows 10 tablet application without using the settings app

Question

I wonder if it is possible to discover unpaired Bluetooth devices programmatically within a Windows 10 tablet application.

I really don't want to pair by Settings -> Devices -> Bluetooth.

Unfortunately I couldn't find any documentation/example that would have helped.

I tried to search for Bluetooth devices by using the BluetoothLEAdvertisementWatcher but I wasn't able to find any. Probably because these devices were no BluetoothLE devices. Thought these were compatible.

Also I thought it would be possible to create a CLI/C++ wrapper that I could reuse in my UWP application but I feel very uncertain about that as not the whole (especially the interfacing part of the) Win32 API is re-usable in UWP environment.

At a last option I thought there must be a way to just get the list of devices that Windows generates when entering Settings -> Devices -> Bluetooth and I tried to achieve that by using a DeviceWachter but without success.

Now I am very desperate. For my application it would be horrible to manually pair each and every device before using it. I cannot understand why Microsoft cuts the developers so enormous.

Thanks in advance for your help.

Answer 1

Grace's answer is correct. I tried this sample before but stopped working on it as it expected a Windows Phone instead of a Windows 10 tablet.

Now I extracted the DeviceWatcher part but created the DeviceWatcher with the selector BluetoothDevice.GetDeviceSelectorFromPairingState(false). Only with this selecter the watcher was able to finde unpaired Bluetooth devices.

It also works with:

DeviceInformation.FindAllAsync(BluetoothDevice.GetDeviceSelectorFromPairingState(false))