Problem connecting to BLE devices with Windows

[corentinbettiol]

• bleak version: 0.4.2
• Python version: 3.7.3
• Operating System: Windows 10

Description

On linux (backends/bluezdbus/client.py), connect() function uses discover() with a timeout : await discover(timeout=0.1, loop=self.loop) (here).

On windows (backends/dotnet/client.py), connect() function uses discover() with a defined value: devices = await discover(2.0, loop=self.loop) (here), which leads to random errors due to the fact that Windows is unable to discover the device to connect to within 2 seconds.

Since discover() has a timeout var, it can be good to use timeout=2.0 instead of 2.0 in client.py, so developers can adapt the value without having to manually change Bleak.

[hbldh]

Thank you for your ideas. I agree, I have thought about this as well. My initial idea had been to not have any keyword argument at all for the connect method, but I think I might have to reconsider this.
I will probably make a temporary fix in version 0.4.3 to give users the configurability you ask for, but I have an idea for a more permanent solution which requires a lot more time to develop; time I do not have right now I am afraid. I will get back to you here when I have made some modifications and/or plans.

[corentinbettiol]

Thank you for your quick answer, I will look at v0.4.3 when it will be available :)

[hbldh]

Released 0.4.3 yesterday. Timeout keyword is now available in both BlueZ and .NET backend.

[pneumus]

I have a similar problem.
Windows 10 + Python 3.7 + bleak
I can not even import BleakClient from bleak
I also tried bleson with no result...
I can only discover / scan / list nearby devices but unable to connect.

Any idea?

[hbldh]

@sonus89 please create a new issue and add code and traceback of errors there.