Question: Can this DLL check for BLE devices that is already Paired with Windows?

[Ugobyte]

Not an issue but a question.
It seems like this DLL only scans for advertising BLE Devices.
Is it possible to connect to a BLE Device that is already connected and paired to Windows? If so, what am I missing? I can't seem to find the function.

Thanks

[adabru]

I would think the watcher would also list already connected devices in:

BleWinrtDll/BleWinrtDll/BleWinrtDll.cpp

Lines 268 to 273 in 24ea477

	IVector<hstring> requestedProperties = single_threaded_vector<hstring>({ L"System.Devices.Aep.DeviceAddress", L"System.Devices.Aep.IsConnected", L"System.Devices.Aep.Bluetooth.Le.IsConnectable" });
	hstring aqsAllBluetoothLEDevices = L"(System.Devices.Aep.ProtocolId:=\"{bb7bb05e-5972-42b5-94fc-76eaa7084d49}\")"; // list Bluetooth LE devices
	deviceWatcher = DeviceInformation::CreateWatcher(
	aqsAllBluetoothLEDevices,
	requestedProperties,
	DeviceInformationKind::AssociationEndpoint);

The code currently checks if the IsConnectable flag changed:

BleWinrtDll/BleWinrtDll/BleWinrtDll.cpp

Lines 238 to 244 in 24ea477

	void DeviceWatcher_Updated(DeviceWatcher sender, DeviceInformationUpdate deviceInfoUpdate) {
	DeviceUpdate deviceUpdate;
	wcscpy_s(deviceUpdate.id, sizeof(deviceUpdate.id) / sizeof(wchar_t), deviceInfoUpdate.Id().c_str());
	if (deviceInfoUpdate.Properties().HasKey(L"System.Devices.Aep.Bluetooth.Le.IsConnectable")) {
	deviceUpdate.isConnectable = unbox_value<bool>(deviceInfoUpdate.Properties().Lookup(L"System.Devices.Aep.Bluetooth.Le.IsConnectable"));
	deviceUpdate.isConnectableUpdated = true;
	}

I guess you should be able to check the deviceInfo.Pairing.IsPaired(ref) and deviceInfo.Properties().Lookup(L"System.Devices.Aep.Bluetooth.Le.IsConnected")(ref) properties?

Other than that, maybe you can call Connect on an already connected device?

[Ugobyte]

@adabru Thanks for the response. I ended up not using "paired" rather, i used "Connected" and it works.