UpdateDevice IsConnectable Flag not Reset

[SamuelKnobel]

I'm working in the Unity Editor

During the Scan of devices, we filter for devices that are connectable. In the Demo, when I have my Device Reset, then it's detectable and I can subscribe. When I quit the Playmode and start it again, the device does not appear anymore. After a long search, I realised it's just because the this part:

[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Unicode)]
    public struct DeviceUpdate
    {
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 100)]
        public string id;
        [MarshalAs(UnmanagedType.I1)]
        public bool isConnectable;
        [MarshalAs(UnmanagedType.I1)]
        public bool isConnectableUpdated;
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 50)]
        public string name;
        [MarshalAs(UnmanagedType.I1)]
        public bool nameUpdated;
    }

The variable isConnectable of the device is not reset, meaning it stays false, as if the connection is still there.
as there is no disconnect function I don't see what I would have to do to have it reset?

[adabru]

You can try the Microsoft's Bluetooth Low Energy sample to see if it works better there.

Make sure you call BleApi.Quit() to free the connection. If you're using the Demo from this repository, that should already be the case. You can try disabling and enabling your Bluetooth hardware to clear active handles.

The device scan is started here:

// https://github.com/adabru/BleWinrtDll/blob/main/BleWinrtDll/BleWinrtDll.cpp#L268-L273
	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);

You can also check out the DeviceWatcher_Addedand DeviceWatcher_Updated callbacks.

It's easier if you debug in the Microsoft C# sample first and then port the relevant lines of code over to BleWinrtDll.cpp.