temp. sensor group fails during boot

[StSaens]

The problem

I have a group ("sensor.temperatuur_woonkamer_helper") with 3 temp. sensors. 1 aqara, 1 hue, 1 from HA opentherm_gw integration ("sensor.room_temp_thermostat_otgw").

I noticed an error in Developer Tools -> Statistics -> "The state class '' of this entity is not supported."

i think opentherm_gw lacks the proper state_class on its sensors.
And that the HA groups integration doesn’t handle this properly.

Log attached below.

After removing the opentherm_gw sensor from the group the error(s) disappear.

What version of Home Assistant Core has the issue?

2024.6.1

What was the last working version of Home Assistant Core?

No response

What type of installation are you running?

Home Assistant OS

Integration causing the issue

opentherm_gw groups

Link to integration documentation on our website

https://www.home-assistant.io/integrations/opentherm_gw/

Diagnostics information

No response

Example YAML snippet

No response

Anything in the logs that might be useful for us?

Logger: homeassistant.core
Source: core.py:1554
First occurred: 10:03:36 (1 occurrences)
Last logged: 10:03:36

Error running job: <Job onetime listen homeassistant_start <function _async_at_core_state.<locals>._matched_event at 0x7effd9607920> HassJobType.Callback <_OneTimeListener homeassistant.helpers.start:<function _async_at_core_state.<locals>._matched_event at 0x7effd9607920>>>
Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/components/sensor/__init__.py", line 658, in state
    numerical_value = int(value)
                      ^^^^^^^^^^
ValueError: invalid literal for int() with base 10: 'unknown'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/components/sensor/__init__.py", line 661, in state
    numerical_value = float(value)
                      ^^^^^^^^^^^^
ValueError: could not convert string to float: 'unknown'

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/core.py", line 1554, in async_fire_internal
    self._hass.async_run_hass_job(job, event)
  File "/usr/src/homeassistant/homeassistant/core.py", line 936, in async_run_hass_job
    hassjob.target(*args)
  File "/usr/src/homeassistant/homeassistant/core.py", line 1418, in __call__
    self.hass.async_run_hass_job(self.listener_job, event)
  File "/usr/src/homeassistant/homeassistant/core.py", line 936, in async_run_hass_job
    hassjob.target(*args)
  File "/usr/src/homeassistant/homeassistant/helpers/start.py", line 44, in _matched_event
    hass.async_run_hass_job(at_start_job, hass)
  File "/usr/src/homeassistant/homeassistant/core.py", line 936, in async_run_hass_job
    hassjob.target(*args)
  File "/usr/src/homeassistant/homeassistant/components/template/template_entity.py", line 486, in _async_template_startup
    result_info.async_refresh()
  File "/usr/src/homeassistant/homeassistant/helpers/event.py", line 1071, in async_refresh
    self._refresh(None)
  File "/usr/src/homeassistant/homeassistant/helpers/event.py", line 1257, in _refresh
    self.hass.async_run_hass_job(self._job, event, updates)
  File "/usr/src/homeassistant/homeassistant/core.py", line 936, in async_run_hass_job
    hassjob.target(*args)
  File "/usr/src/homeassistant/homeassistant/components/template/template_entity.py", line 435, in _handle_results
    self.async_write_ha_state()
  File "/usr/src/homeassistant/homeassistant/helpers/entity.py", line 1000, in async_write_ha_state
    self._async_write_ha_state()
  File "/usr/src/homeassistant/homeassistant/helpers/entity.py", line 1126, in _async_write_ha_state
    state, attr, capabilities, shadowed_attr = self.__async_calculate_state()
                                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/helpers/entity.py", line 1061, in __async_calculate_state
    state = self._stringify_state(available)
            ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/helpers/entity.py", line 1006, in _stringify_state
    if (state := self.state) is None:
                 ^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/components/sensor/__init__.py", line 665, in state
    raise ValueError(
ValueError: Sensor sensor.cpu_usage_helper has device class 'None', state class 'measurement' unit '%' and suggested precision 'None' thus indicating it has a numeric value; however, it has the non-numeric value: 'unknown' (<class 'str'>)

Additional information

No response

[home-assistant]

Hey there @mvn23, mind taking a look at this issue as it has been labeled with an integration (opentherm_gw) you are listed as a code owner for? Thanks!

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[mvn23]

Thank you for the report. This is likely due to the fact that the state_class attribute is not implemented in opentherm_gw as of yet.