Zwave error. What does this mean?

Configuration Z-Wave
1

Since a few days, frequently my Zwave devices show off-line and generally they come back after a restart.
This is what my log shows:

Logger: homeassistant
Source: components/zwave_js/__init__.py:683
First occurred: 11:36:10 AM (17 occurrences)
Last logged: 12:41:28 PM

Error doing job: Task exception was never retrieved (None)
Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/components/zwave_js/__init__.py", line 683, in async_on_node_ready
    if not node.is_controller_node and await node.async_has_device_config_changed():
                                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.13/site-packages/zwave_js_server/model/node/__init__.py", line 957, in async_has_device_config_changed
    data = await self.async_send_command(
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    ...<3 lines>...
    )
    ^
  File "/usr/local/lib/python3.13/site-packages/zwave_js_server/model/node/__init__.py", line 504, in async_send_command
    result = await self.client.async_send_command(message, **kwargs)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/local/lib/python3.13/site-packages/zwave_js_server/client.py", line 129, in async_send_command
    await self._send_json_message(message)
  File "/usr/local/lib/python3.13/site-packages/zwave_js_server/client.py", line 561, in _send_json_message
    await self._client.send_json(message)
  File "/usr/local/lib/python3.13/site-packages/aiohttp/client_ws.py", line 259, in send_json
    await self.send_str(dumps(data), compress=compress)
  File "/usr/local/lib/python3.13/site-packages/aiohttp/client_ws.py", line 243, in send_str
    await self._writer.send_frame(
        data.encode("utf-8"), WSMsgType.TEXT, compress=compress
    )
  File "/usr/local/lib/python3.13/site-packages/aiohttp/_websocket/writer.py", line 125, in send_frame
    raise ClientConnectionResetError("Cannot write to closing transport")
aiohttp.client_exceptions.ClientConnectionResetError: Cannot write to closing transport

Anyone has an idea what needs to be done ?
Thanks

2

Googling this error, it could indicate that a connection was trying to be used even though it had already been closed. What kind of Z-wave adapter setup are you using? If it is a directly-connected (USB) adapter, many recommend using the /dev/serial/by-id/ path instead of the /dev/tty path for more reliable connections. If it a serial-over-IP adapter, there could be any number of network issues/delays causing the connection to be closed. Next steps would be to save detailed logs from Z-Wave JS UI to capture exactly what it is failing to do and hopefully why.

3

Thanks. I will look at the Z-Wave JS UI. I am using a Zooz 800 USB stick.