Unable to import component: No module named 'pymodbus.pdu.register_read_message'

[rabattcoupon]

Hi, the integration stopped working after rebooting the machine. Would be great if you have an idea how to fix this.

Here is what has been logged:

Logger: homeassistant.setup
Source: setup.py:334
First occurred: 13:36:16 (1 occurrences)
Last logged: 13:36:16
Setup failed for custom integration 'foxess_modbus': Unable to import component: No module named 'pymodbus.pdu.register_read_message'

Traceback (most recent call last):
File "/usr/src/homeassistant/homeassistant/setup.py", line 334, in _async_setup_component
component = await integration.async_get_component()
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/src/homeassistant/homeassistant/loader.py", line 1035, in async_get_component
self._component_future.result()
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
File "/usr/src/homeassistant/homeassistant/loader.py", line 1015, in async_get_component
comp = await self.hass.async_add_import_executor_job(
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
self._get_component, True
^^^^^^^^^^^^^^^^^^^^^^^^^
)
^
File "/usr/local/lib/python3.13/concurrent/futures/thread.py", line 59, in run
result = self.fn(*self.args, **self.kwargs)
File "/usr/src/homeassistant/homeassistant/loader.py", line 1075, in _get_component
ComponentProtocol, importlib.import_module(self.pkg_path)
~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^
File "/usr/src/homeassistant/homeassistant/util/loop.py", line 200, in protected_loop_func
return func(*args, **kwargs)
File "/usr/local/lib/python3.13/importlib/init.py", line 88, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "", line 1387, in _gcd_import
File "", line 1360, in _find_and_load
File "", line 1331, in _find_and_load_unlocked
File "", line 935, in _load_unlocked
File "", line 1026, in exec_module
File "", line 488, in _call_with_frames_removed
File "/config/custom_components/foxess_modbus/init.py", line 20, in
from .client.modbus_client import ModbusClient
File "/config/custom_components/foxess_modbus/client/modbus_client.py", line 18, in
from pymodbus.pdu.register_read_message import ReadHoldingRegistersResponse
ModuleNotFoundError: No module named 'pymodbus.pdu.register_read_message'

[canton7]

Please remember to look through open issues, particularly the one pinned prominently at the top.

HA 2025.2 broke things again. We'll get a fix out when we can.

[canton7]

Huh, I wonder whether our approach vendoring pymodbus doesn't work if another integration has already loaded HA's version of pymodbus... You're definitely running the right foxess_modbus version, and it's definitely failing to properly use our vendored pymodbus version.

I'll do some more investigation when I can

[rabattcoupon]

Thank you very much!

The two integrations ran for a very long time next to each other without any issues. I found something: Looks like there was an update of https://github.com/pail23/stiebel_eltron_isg_component installed today, after which your integration stopped working.

If I can do anything, let me know.

[FozzieUK]

Huh, I wonder whether our approach vendoring pymodbus doesn't work if another integration has already loaded HA's version of pymodbus... You're definitely running the right foxess_modbus version, and it's definitely failing to properly use our vendored pymodbus version.

I'll do some more investigation when I can

Hmmm, i’d read a comment from another developer that said you could load your own version but you couldn’t get version isolation, I think now I understand what he meant by that…. oh boy 🤔

[canton7]

Would you mind trying v1.13.2b1?

[rabattcoupon]

Wohooo, awesome work! No issues during reboot or startup, it even felt like the system started quicker than before. :-)

Thank you! You guys are very fast!