Victron GX Modbus TCP integration fails on Home Assistant 2025.10.4 due to Endian import error

[Polosaz]

The problem

<Entities have become unavailable and the integration does not load since I upgraded to HA 2025.10.4>

Environment

• Home Assistant Core release with the issue: 2025.10.4
• Last working Home Assistant Core release (if known): 2025.08.1
• Integration version causing this issue: 0.35?

Problem-relevant configuration dialog

Traceback/Error logs

Fuente: setup.py:343
Ocurrió por primera vez: 12:38:16 (1 ocurrencia)
Última vez registrado: 12:38:16

Setup failed for custom integration 'victron': Unable to import component: cannot import name 'Endian' from 'pymodbus.constants' (/usr/local/lib/python3.13/site-packages/pymodbus/constants.py)
Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/loader.py", line 1006, 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 1066, in _get_component
    ComponentProtocol, importlib.import_module(self.pkg_path)
                       ~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/util/loop.py", line 201, 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 "<frozen importlib._bootstrap>", line 1387, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1360, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1331, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 935, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 1026, in exec_module
  File "<frozen importlib._bootstrap>", line 488, in _call_with_frames_removed
  File "/config/custom_components/victron/__init__.py", line 10, in <module>
    from .coordinator import victronEnergyDeviceUpdateCoordinator as Coordinator
  File "/config/custom_components/victron/coordinator.py", line 13, in <module>
    from pymodbus.constants import Endian
ImportError: cannot import name 'Endian' from 'pymodbus.constants' (/usr/local/lib/python3.13/site-packages/pymodbus/constants.py)

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/setup.py", line 343, in _async_setup_component
    component = await integration.async_get_component()
                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/loader.py", line 1026, in async_get_component
    self._component_future.result()
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^^
  File "/usr/src/homeassistant/homeassistant/loader.py", line 1018, in async_get_component
    comp = self._get_component()
  File "/usr/src/homeassistant/homeassistant/loader.py", line 1066, in _get_component
    ComponentProtocol, importlib.import_module(self.pkg_path)
                       ~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/util/loop.py", line 201, 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 "<frozen importlib._bootstrap>", line 1387, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1360, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1331, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 935, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 1026, in exec_module
  File "<frozen importlib._bootstrap>", line 488, in _call_with_frames_removed
  File "/config/custom_components/victron/__init__.py", line 10, in <module>
    from .coordinator import victronEnergyDeviceUpdateCoordinator as Coordinator
  File "/config/custom_components/victron/coordinator.py", line 13, in <module>
    from pymodbus.constants import Endian
ImportError: cannot import name 'Endian' from 'pymodbus.constants' (/usr/local/lib/python3.13/site-packages/pymodbus/constants.py)


Registrador: homeassistant.util.loop
Fuente: util/loop.py:77
Ocurrió por primera vez: 12:38:16 (1 ocurrencia)
Última vez registrado: 12:38:16

Detected blocking call to import_module with args ('custom_components.victron',) in /usr/src/homeassistant/homeassistant/loader.py, line 1066: ComponentProtocol, importlib.import_module(self.pkg_path) inside the event loop; This is causing stability issues. Please create a bug report at https://github.com/home-assistant/core/issues?q=is%3Aopen+is%3Aissue For developers, please see https://developers.home-assistant.io/docs/asyncio_blocking_operations/#import_module Traceback (most recent call last): File "<frozen runpy>", line 198, in _run_module_as_main File "<frozen runpy>", line 88, in _run_code File "/usr/src/homeassistant/homeassistant/__main__.py", line 229, in <module> sys.exit(main()) File "/usr/src/homeassistant/homeassistant/__main__.py", line 215, in main exit_code = runner.run(runtime_conf) File "/usr/src/homeassistant/homeassistant/runner.py", line 271, in run return loop.run_until_complete(setup_and_run_hass(runtime_config)) File "/usr/local/lib/python3.13/asyncio/base_events.py", line 712, in run_until_complete self.run_forever() File "/usr/local/lib/python3.13/asyncio/base_events.py", line 683, in run_forever self._run_once() File "/usr/local/lib/python3.13/asyncio/base_events.py", line 2050, in _run_once handle._run() File "/usr/local/lib/python3.13/asyncio/events.py", line 89, in _run self._context.run(self._callback, *self._args) File "/usr/src/homeassistant/homeassistant/setup.py", line 170, in async_setup_component result = await _async_setup_component(hass, domain, config) File "/usr/src/homeassistant/homeassistant/setup.py", line 343, in _async_setup_component component = await integration.async_get_component() File "/usr/src/homeassistant/homeassistant/loader.py", line 1018, in async_get_component comp = self._get_component() File "/usr/src/homeassistant/homeassistant/loader.py", line 1066, in _get_component ComponentProtocol, importlib.import_module(self.pkg_path)

In case of unit ID issue, missing devices or non-updating devices

Additional information

[JJANOUSEK1]

I have same problem, try everything - nothing work - change pymodbus, in manifest file, try downgrade via terminal etc... :(

[sfstar]

Hello and thank you for opening this issue.
As far as I can see the latest stable release is 0.6.2
Please try upgrading to that version in order to rule out it having to do with an old integration version

[JJANOUSEK1]

hello, any updates? problem still exist :(

[asmcc]

@sfstar: What is about this MODBUS TCP Issue, which is reported here, than here and additionaly as PR? I do not know it exactly, but for me it sounds as the same issue.
Since 2 or 3 week after several updates of HomeAssistant my VICTRON intergation in version 0.6.2 did not start. As I have MODBUS TCP, too, I assume that I also have this issue. And before I open a new issue for one and the same bug here, I would ask you, if you are planing a update in the next days for 0.6.2 to fix this bug.
Thanks!

[github-actions]

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