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adabru / BleWinrtDll

BLE for Unity 3d in Windows without UWP.
Do What The F*ck You Want To Public License
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Disconnected peripherals, Reading specific characteristics. #6

Open Quget opened 3 years ago

Quget commented 3 years ago

Hello!

I started using this library today in my Unity Project, seems nice to use so far. I am able to scan, connect(trough 'polling' services), subscribe and write to specific characteristics 👍

But I did end up with 2 problems.

I can't figure out how to see if my peripheral got disconnected. This is quite handy to know if I want to automaticly reconnect to the device.

I also can't figure out how to read a specific characteristic.

adabru commented 3 years ago

Hi @quget,

checking the connection status and requesting a value from the device is not implemented as I didn't had the need for that yet.

For the connection status, I guess you can try using a GattSession with MaintainConnection set to true, as it is mentioned in the note on this doc page. The session has also an event in the case the connection-status changes.

Reading/Requesting a specific characteristic value from the device can be done with the ReadValueAsync function . You can use the code of SendData as template for that. This is the easier one. Alternatively you can write to one characterstic and program your device so that it will trigger a notification of the characteristic you're interested in.

Quget commented 3 years ago

Thanks for the quick reply! I did try to go trough the source code. But I don't know c++ so well. It will take me a while to understand it.

adabru commented 3 years ago

You can checkout the Microsoft sample (C# and equivalent C++ code) as reference for ReadValueAsync.

In my case I first got it to work in C# UWP, then in a C++ winrt console program and then in the dll. If you'll have specific questions regarding the code, feel free to ask.

Quget commented 3 years ago

I think I manage to get the read one in. Just got to test it out. Using the same queue as the subscribed characteristic.

Connection status will be a bit of a problem but I will get there I think :)

adabru commented 1 year ago

As reference for reading specific characteristics:

tufeixp's ReadDataAsync function: https://github.com/adabru/BleWinrtDll/issues/30#issuecomment-1118295341

SendData code as comparison if you want to add error handling or blocking read: https://github.com/adabru/BleWinrtDll/blob/f2635b7b02432ea3006983657107f092c862171d/BleWinrtDll/BleWinrtDll.cpp#L528-L561