Unable to unpair with device

• bleak version: 0.13.0
• Python version: 3.8.5
• Operating System: Win10

Description

I am trying to pair and unpair with an Arduino Nano 33 BLE. I want to pair since there is an HID service I want to use which won’t work using the standard connect method since it throws an Access Denied.

What I Did

Pairing works fine and I can use it as an HID. I am planning to use unpair for disconnecting. Calling unpair does nothing. The issue seems to be that unpair uses the following boolean variable - self._requester.device_information.pairing.is_paired

        client=BleakClientWinRT(device_address)
        is_connected=await client.connect()
        is_paired=await client.pair(2)
        print(is_paired)
        await asyncio.sleep(10)
        await client.unpair()

Even though the pair function returns true, the above boolean variable remains false. Possibly something on the firmware end and I can’t figure out how to fix that.

Is it possible to have another boolean instance variable to store the pairing status at the software end and raise an exception if unpair fails? Is it also possible that the above boolean variable isn’t being refreshed after pairing in Bleak?

This is a bit urgent so I’d appreciate some quick help! TIA

[harshdeepsehgal]

Yes, that was exactly what I was looking at. However, I guess the attributes of _requester are not writable. When I added the following- self._requester.device_information=await DeviceInformation.create_from_id_async(self._requester.device_information.id)

I get this attribute error- AttributeError: attribute 'device_information' of '_bleak_winrt_Windows_Devices_Bluetooth.BluetoothLEDevice' objects is not writable

The device_information object is being used only in the pair and unpair functions. If you intend to keep the _requester read-only, what we can do is create a local device_information object for these functions and use them for checks.

device_information=await DeviceInformation.create_from_id_async(self._requester.device_information.id)
if device_information.pairing.is_paired:
    unpairing_result = (
        await device_information.pairing.unpair_async()
     )

I tried this and it worked. Doesn’t seem to break anything for now.

[harshdeepsehgal]

Hi guys, I have been MIA for a while, but I was able to test this enough and the solution does work and would be a good stand-in while the new pairing functionality is completed. I have linked the PR to the issue 😃 (#757 )