The last time I am having some problems with my SLZB06 Zigbee coördinator.
Within ZHA I get an error “Unkown error” above the ZHA zigbee integration. (Just above the place where it shows your zigbee network is online.)
When I power off and on my SLZB06 coördinator and I reboot HA everything works again.
Sometimes for a few hours, sometimes for 1 day, there is no routine in it.
I did take a look at the system logs and I found a few things which are related to it, but I do not know what is wrong and how to fix this problem.
Somebody an idea what is going wrong please?
Logger: homeassistant
Source: /usr/src/homeassistant/homeassistant/runner.py:239
First occurred: 16:11:52 (1 occurrence)
Last logged: 16:11:52
Error doing job: AttributeError exception in shielded future (task: None)
Traceback (most recent call last):
File "/usr/local/lib/python3.14/site-packages/zigpy_znp/api.py", line 1111, in request_callback_rsp
await self.request(request, timeout=timeout, **response_params)
File "/usr/local/lib/python3.14/site-packages/zigpy_znp/api.py", line 1065, in request
self._uart.send(frame)
~~~~~~~~~~~~~~~^^^^^^^
File "/usr/local/lib/python3.14/site-packages/zigpy_znp/uart.py", line 66, in send
self.write(frames.TransportFrame(payload).serialize())
~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.14/site-packages/zigpy_znp/uart.py", line 75, in write
self._transport.write(data)
^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'write'
Logger: homeassistant
Source: /usr/src/homeassistant/homeassistant/runner.py:239
First occurred: 16:11:52 (35 occurrences)
Last logged: 16:11:52
Error doing job: AttributeError exception in shielded future (task: None)
Traceback (most recent call last):
File "/usr/local/lib/python3.14/site-packages/zigpy_znp/api.py", line 1111, in request_callback_rsp
await self.request(request, timeout=timeout, **response_params)
File "/usr/local/lib/python3.14/site-packages/zigpy_znp/api.py", line 1065, in request
self._uart.send(frame)
^^^^^^^^^^^^^^^
AttributeError: 'NoneType' object has no attribute 'send'
Logger: homeassistant
Source: /usr/src/homeassistant/homeassistant/runner.py:239
First occurred: 16:11:37 (17 occurrences)
Last logged: 16:11:52
Error doing job: TimeoutError exception in shielded future (task: None)
Traceback (most recent call last):
File "/usr/local/lib/python3.14/site-packages/zigpy_znp/api.py", line 1113, in request_callback_rsp
return await callback_rsp
^^^^^^^^^^^^^^^^^^
asyncio.exceptions.CancelledError
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "/usr/local/lib/python3.14/site-packages/zigpy_znp/api.py", line 1110, in request_callback_rsp
async with asyncio.timeout(timeout):
~~~~~~~~~~~~~~~^^^^^^^^^
File "/usr/local/lib/python3.14/asyncio/timeouts.py", line 115, in __aexit__
raise TimeoutError from exc_val
TimeoutError
Logger: zigpy.zcl
Source: runner.py:290
First occurred: 17:12:25 (1 occurrence)
Last logged: 17:12:25
[0x9078:1:0x0b04] Traceback (most recent call last): File "/usr/local/lib/python3.14/site-packages/zigpy/zcl/__init__.py", line 899, in reply return await self._endpoint.reply( ^^^^^^^^^^^^^^^^^^^^^^^^^^^ ...<11 lines>... ) ^ File "/usr/local/lib/python3.14/site-packages/zigpy/endpoint.py", line 269, in reply return await self.device.reply( ^^^^^^^^^^^^^^^^^^^^^^^^ ...<13 lines>... ) ^ File "/usr/local/lib/python3.14/site-packages/zigpy/device.py", line 996, in reply return await self.request( ^^^^^^^^^^^^^^^^^^^ ...<12 lines>... ) ^ File "/usr/local/lib/python3.14/site-packages/zigpy/device.py", line 693, in request await send_request(attempt=attempt) File "/usr/local/lib/python3.14/site-packages/zigpy/application.py", line 1143, in request await self.send_packet( ...<14 lines>... ) File "/usr/local/lib/python3.14/site-packages/zigpy_znp/zigbee/application.py", line 922, in send_packet await self._send_request_raw( ...<11 lines>... ) File "/usr/local/lib/python3.14/site-packages/zigpy_znp/zigbee/application.py", line 816, in _send_request_raw response = await asyncio.shield( ^^^^^^^^^^^^^^^^^^^^^ ...<13 lines>... ) ^ asyncio.exceptions.CancelledError
Logger: zigpy.application
Source: /usr/local/lib/python3.14/site-packages/zigpy/application.py:943
First occurred: August 26, 2026 at 23:30:15 (1 occurrence)
Last logged: August 26, 2026 at 23:30:15
Watchdog failure
Traceback (most recent call last):
File "/usr/local/lib/python3.14/site-packages/zigpy_znp/api.py", line 1072, in request
response = await response_future
^^^^^^^^^^^^^^^^^^^^^
asyncio.exceptions.CancelledError
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "/usr/local/lib/python3.14/site-packages/zigpy/application.py", line 941, in _watchdog_loop
await self.watchdog_feed()
File "/usr/local/lib/python3.14/site-packages/zigpy/application.py", line 927, in watchdog_feed
await self._watchdog_feed()
File "/usr/local/lib/python3.14/site-packages/zigpy_znp/zigbee/application.py", line 594, in _watchdog_feed
await self._znp.request(c.SYS.Ping.Req())
File "/usr/local/lib/python3.14/site-packages/zigpy_znp/api.py", line 1068, in request
async with asyncio.timeout(
~~~~~~~~~~~~~~~^
timeout or self._znp_config[conf.CONF_SREQ_TIMEOUT]
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
):
^
File "/usr/local/lib/python3.14/asyncio/timeouts.py", line 115, in __aexit__
raise TimeoutError from exc_val
TimeoutError
