zigpy
Controller doesnt reconnect after serial connection lost.
Previously in home assistant 2024.10.3, I would see the following errors, but everything recovered fine:
2024-12-03 11:58:02.028 ERROR (bellows.thread_0) [bellows.uart] Lost serial connection: SerialException('device reports readiness to read but returned no data (device disconnected or multiple access on port?)')
2024-12-03 11:58:02.029 ERROR (MainThread) [bellows.ezsp] NCP entered failed state. Requesting APP controller restart
But now (home assistant 2024.11), it seems that if the serial connection is lost, it doesnt appear to reestablish? I think it might be related to #633
This issue is also being tracked at in Home Assistant Core.
Can you attach a full ZHA debug log of it failing to reconnect?
The are several logs in the references issue https://github.com/home-assistant/core/issues/130548. Failed reconnect will be part of them
@erkr Your logs seem to specifically omit the logging I'm interested in. I need to see if this occurs with other people because reconnection logic is working as far as I'm able to test with SiLabs radios.
@puddly pity they don't provide what you need. I was able to return my ZBDongle-E and reverted to my Conbee2. Less range but stable
I'm still running ha 2024.10.3 without any issues, I'll try and roll forward again and capture more logs but unfortunately I'm away into early Jan.
I have the same issue as described in the bug, that the serial connection is not reconnecting. I hope my logs are helpful. This error is most noticable: TypeError: object NoneType can't be used in 'await' expression
Logs:
Failed to send request: ApplicationController is not running
Logger: py.warnings
Quelle: /usr/local/lib/python3.13/warnings.py:110
Erstmals aufgetreten: 09:01:55 (1 Vorkommnisse)
Zuletzt protokolliert: 09:01:55
/usr/local/lib/python3.13/asyncio/base_events.py:746: RuntimeWarning: coroutine 'SerialProtocol.disconnect' was never awaited self._ready.clear()
Logger: zigpy.application
Quelle: /usr/local/lib/python3.13/site-packages/zigpy/application.py:427
Erstmals aufgetreten: 08:32:43 (2 Vorkommnisse)
Zuletzt protokolliert: 08:35:57
Failed to disconnect from radio
Traceback (most recent call last):
File "/usr/local/lib/python3.13/site-packages/zigpy/application.py", line 425, in shutdown
await self.disconnect()
File "/usr/local/lib/python3.13/site-packages/bellows/zigbee/application.py", line 459, in disconnect
await self._ezsp.disconnect()
File "/usr/local/lib/python3.13/site-packages/bellows/ezsp/__init__.py", line 193, in disconnect
await self._gw.disconnect()
TypeError: object NoneType can't be used in 'await' expression
Logger: bellows.thread
Quelle: components/zha/helpers.py:761
Erstmals aufgetreten: 08:32:43 (2 Vorkommnisse)
Zuletzt protokolliert: 08:35:57
Attempted to use a closed event loop
Logger: zigpy.application
Quelle: /usr/local/lib/python3.13/site-packages/zigpy/application.py:663
Erstmals aufgetreten: 08:32:43 (1 Vorkommnisse)
Zuletzt protokolliert: 08:32:43
Watchdog failure
Traceback (most recent call last):
File "/usr/local/lib/python3.13/site-packages/zigpy/application.py", line 661, in _watchdog_loop
await self.watchdog_feed()
File "/usr/local/lib/python3.13/site-packages/zigpy/application.py", line 647, in watchdog_feed
await self._watchdog_feed()
File "/usr/local/lib/python3.13/site-packages/bellows/zigbee/application.py", line 925, in _watchdog_feed
current_counters = await self._ezsp.read_counters()
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.13/site-packages/bellows/ezsp/v4/__init__.py", line 191, in read_counters
(res,) = await self.readCounters()
^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.13/site-packages/bellows/ezsp/protocol.py", line 126, in command
await self._gw.send_data(data)
File "/usr/local/lib/python3.13/site-packages/bellows/uart.py", line 31, in send_data
await self._transport.send_data(data)
File "/usr/local/lib/python3.13/site-packages/bellows/ash.py", line 708, in send_data
await asyncio.shield(
...<6 lines>...
)
File "/usr/local/lib/python3.13/site-packages/bellows/ash.py", line 656, in _send_data_frame
await ack_future
RuntimeError: Connection has been closed
Logger: homeassistant
Quelle: /usr/src/homeassistant/homeassistant/runner.py:112
Erstmals aufgetreten: 08:32:43 (1 Vorkommnisse)
Zuletzt protokolliert: 08:32:43
Error doing job: Fatal write error on serial transport (None)
Traceback (most recent call last):
File "/usr/local/lib/python3.13/site-packages/serial/serialposix.py", line 621, in write
n = os.write(self.fd, d)
OSError: [Errno 19] No such device
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/usr/local/lib/python3.13/site-packages/serial_asyncio_fast/__init__.py", line 310, in _write_data
n = self._serial.write(data)
File "/usr/local/lib/python3.13/site-packages/serial/serialposix.py", line 655, in write
raise SerialException('write failed: {}'.format(e))
serial.serialutil.SerialException: write failed: [Errno 19] No such device
Not sure if it's relevant here, but I'm having part of the same error message. The whole ZHA network stops working around once every 2-3 days, and I have to restart HA to recover.
Logger: zigpy.application
Source: /usr/local/lib/python3.13/site-packages/zigpy/application.py:465
First occurred: 22 November 2025 at 07:59:41 (8 occurrences)
Last logged: 08:08:52
Failed to disconnect from radio
Traceback (most recent call last):
File "/usr/local/lib/python3.13/site-packages/zigpy/application.py", line 463, in shutdown
await self.disconnect()
File "/usr/local/lib/python3.13/site-packages/bellows/zigbee/application.py", line 586, in disconnect
await self._ezsp.disconnect()
File "/usr/local/lib/python3.13/site-packages/bellows/ezsp/__init__.py", line 218, in disconnect
await self._gw.disconnect()
TypeError: object NoneType can't be used in 'await' expression
We're tracking this issue here: https://github.com/home-assistant/core/issues/130548. This isn't an issue with the bellows library.