Device Failing to Connect

• bleak version: 0.14.2
• Python version: 3.9
• Operating System: Windows 11 Build: 22000.613
• BlueZ version (bluetoothctl -v) in case of Linux:

Description

I am a first-time bleak user and want to talk to a GATT server with a known address. Connection can be established as shown within Windows Bluetooth settings however it seems like Bleak never recognizes that the device connects and is stuck waiting

What I Did

async with BleakClient(address) as client: print(‘connected’)

Force quitting this yields the following error:

  ----> 1 async with BleakClient(address) as client:
        2         print('connected')
  ~\anaconda3\lib\site-packages\bleak\backends\client.py in __aenter__(self)
       59 
       60     async def __aenter__(self):
  ---> 61         await self.connect()
       62         return self
       63 
  ~\anaconda3\lib\site-packages\bleak\backends\winrt\client.py in connect(self, **kwargs)
      273 
      274         # Obtain services, which also leads to connection being established.
  --> 275         await self.get_services()
      276 
      277         return True
  
  ~\anaconda3\lib\site-packages\bleak\backends\winrt\client.py in get_services(self, **kwargs)
      444             logger.debug("Get Services...")
      445             services: Sequence[GattDeviceService] = _ensure_success(
  --> 446                 await self._requester.get_gatt_services_async(
      447                     BluetoothCacheMode.UNCACHED
      448                 ),
  
  CancelledError: 
  
  
  
  
  
  ```

[nickbedbury]

I updated to bleak==0.15.1 and am able to connect now. I haven’t done an exhaustive test, but 5 attempts were successful in a row, which seems improved from before.

The hold-up recording Wireshark for me is permission related (work laptop, no admin rights).

I am still unable to write to a CHRC, but perhaps that is some other problem. --> EDIT: can confirm this is a different issue. (needed response=True)

[dlech]

I am not able to capture Wireshark presently. I’m not too familiar with doing that for Bluetooth…but it shows no activity when I enabled capture.

There are instructions on how to do this at https://bleak.readthedocs.io/en/latest/troubleshooting.html#windows-10