BlueZ error when connecting to BLE device

[Matt-Hicks-Bose]

• bleak version: 0.7.0
• Python version: 3.7.3
• Operating System: Raspbian GNU/Linux 10 (buster)
• BlueZ version (bluetoothctl -v) in case of Linux: 5.50

Description

BlueZ error when connecting to BLE device. This is happening in my application code, but also with the service_explorer.py AND get_services.py examples. It does work <10% of the time, but it usually results in an exception.

What I Did

$ python3 service_explorer.py
Traceback (most recent call last):
  File "/home/pi/.local/lib/python3.7/site-packages/bleak/backends/bluezdbus/client.py", line 151, in connect
    ).asFuture(self.loop)
txdbus.error.RemoteError: org.bluez.Error.Failed: Software caused connection abort

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "service_explorer.py", line 64, in <module>
    loop.run_until_complete(run(address, loop, True))
  File "/usr/lib/python3.7/asyncio/base_events.py", line 584, in run_until_complete
    return future.result()
  File "service_explorer.py", line 29, in run
    async with BleakClient(address, loop=loop) as client:
  File "/home/pi/.local/lib/python3.7/site-packages/bleak/backends/client.py", line 49, in __aenter__
    await self.connect()
  File "/home/pi/.local/lib/python3.7/site-packages/bleak/backends/bluezdbus/client.py", line 154, in connect
    raise BleakError(str(e))
bleak.exc.BleakError: org.bluez.Error.Failed: Software caused connection abort

[Matt-Hicks-Bose]

Maybe related to #238 ?

[hbldh]

I bellieve that this is some error in BlueZ or your BLE device. Bleak just reports the OS level error.

There isn't much I can do about this I am afraid. Try connecting to your device through gatttool or other BLueZ using means and try to see if that works.

[dlech]

I find it useful to use Wireshark to capture Bluetooth packets to see what is actually going on.

[Matt-Hicks-Bose]

I started digging into it with wireshark today, I will update when I know more.

[ArthurKun21]

Also encountered this, What can I do to help in processing this error?

Traceback (most recent call last):
  File "/usr/local/lib/python3.7/dist-packages/bleak-0.7.1-py3.7.egg/bleak/backends/bluezdbus/client.py", line 153, in connect
    ).asFuture(self.loop)
txdbus.error.RemoteError: org.bluez.Error.Failed: Software caused connection abort

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/pi/service_explorer_sample.py", line 63, in <module>
    loop.run_until_complete(run(loop))
  File "/usr/lib/python3.7/asyncio/base_events.py", line 584, in run_until_complete
    return future.result()
  File "/home/pi/service_explorer_sample.py", line 19, in run
    async with BleakClient(device.address, loop=loop) as client:
  File "/usr/local/lib/python3.7/dist-packages/bleak-0.7.1-py3.7.egg/bleak/backends/client.py", line 49, in __aenter__
    await self.connect()
  File "/usr/local/lib/python3.7/dist-packages/bleak-0.7.1-py3.7.egg/bleak/backends/bluezdbus/client.py", line 164, in connect
    raise BleakError(str(e))
bleak.exc.BleakError: org.bluez.Error.Failed: Software caused connection abort

[ArthurKun21]

is it possible that this is what happening on the background?

Since the first scan wasn't terminated if you fired the scan again, it will fail

[hbldh]

The bleak.exc.BleakError: org.bluez.Error.Failed: Software caused connection abort seems to happen to many users. It might be alleviated by #236, or at least it might yield better error reports. Will close this, since there is no actionable content in this issue right now. Feel free to reopen if anyone has new information.

[jaykishan-solanki]

DBUS BLE exception while bluetooth pairing
Exception in thread Thread-12:
Traceback (most recent call last):
File "/home/root/obd/obd_gen2_ble_py/blemodule/adapter.py", line 146, in powered
self.adapter_props.Set(constants.ADAPTER_INTERFACE, 'Powered',
File "/usr/lib/python3.8/site-packages/dbus/proxies.py", line 141, in call
return self._connection.call_blocking(self._named_service,
File "/usr/lib/python3.8/site-packages/dbus/connection.py", line 652, in call_blocking
reply_message = self.send_message_with_reply_and_block(
dbus.exceptions.DBusException: org.freedesktop.DBus.Error.ServiceUnknown: The name :1.1 was not provided by any .service files

can you plese guide me how to solve this error?and what is the root cause of this error

[dlech]

This issue has been closed, so it would be better to start a new discussion at https://github.com/hbldh/bleak/discussions.

Be sure to include Bleak version, operating system, the source code and logs (see troubleshooting page of Bleak docs).