Adding option to avoid using cached services in .NET backend.

[hbldh]

Added

• Keyword arguments to get_services method on BleakClient.
• Keyword argument use_cached on .NET backend, to enable uncached reading of services, characteristics and descriptors in Windows.

Setting use_cached to True by default, since reading them from device noticably increased the connection time. Devices with mutable services are more rare than the opposite I think.

This might solve #429.

[ChinmayJoshi-eaton]

bleak.exc.BleakDotNetTaskError: System.Exception: Catastrophic failure (Exception from HRESULT: 0x8000FFFF (E_UNEXPECTED))

facing this issue

[dlech]

Looks OK to me.

Do you know what the behavior is on macOS? I know on Linux/BlueZ you have to actually remove the device and discover it again to no use the cache. So it might be worth mentioning that in the docs somewhere. It causes problems for people with microcontrollers that can change the services on the device.

[hbldh]

I will have to look into #429 before merging this...

No, I have very little knowledge about how it performs in the other backends, primarily because I do not modify my devices services. I implemented this because it looked like low hanging fruit that might solve an issue...

On macOS I have no idea how to handle this and on Linux only what you have found out and shared here and in other issues.
It might go in the FAQ/troubleshooting section that you set up.

[hbldh]

Added some documentation on the topic.

[dlech]

Added some documentation on the topic.

I like it. 👍

[hbldh]

I might have used your words from another issue describing what needs to be done on BlueZ...😄 🙏🏻