Deprecation of TEMP_CELCIUS in HA Core 2025.1 - Use UnitOfTemperature.CELSIUS instead

[ruudw]

The problem

Not really a bug, but rather a heads-up. As I plowed through my configuration I noticed this log:

Logger: homeassistant.const
Source: helpers/deprecation.py:197
First occurred: 22:01:48 (1 occurrences)
Last logged: 22:01:48

TEMP_CELSIUS was used from nest_protect, this is a deprecated constant which will be removed in HA Core 2025.1. Use UnitOfTemperature.CELSIUS instead, please report it to the author of the 'nest_protect' custom integration

Therefore, I'll provide this kind reminder. :)

What version of this integration (ha-nest-protect) has the issue?

v0.4.0b4

What version of Home Assistant Core has the issue?

2025.1

Device / Model

No response

Diagnostics information

No response

Home Assistant log

Logs

Logger: homeassistant.const
Source: helpers/deprecation.py:197
First occurred: 22:01:48 (1 occurrences)
Last logged: 22:01:48

TEMP_CELSIUS was used from nest_protect, this is a deprecated constant which will be removed in HA Core 2025.1. Use UnitOfTemperature.CELSIUS instead, please report it to the author of the 'nest_protect' custom integration

Additional information

No response

[iMicknl]

Are you sure you use v0.4.0b4? This constant is not present in the beta branch anymore. :)

[ruudw]

Yeah I might be in the wrong here. I took the version number from HACS directly but I just considered that might not be the installed version. :)

[AnthonyBe]

I just updated from 0.3.12 where I was seeing this same warning, to 0.4.0b5 and I am no longer seeing this warning (TEMP_CELSIUS was used from nest_protect, this is a deprecated constant)

I'm also no longer seeing the other deprecation warning - StrEnum was used from nest_protect, this is a deprecated alias

Thanks @iMicknl !

[iMicknl]

@AnthonyBe this warning indeed occurs on the current 'main' branch (0.3.12), this is fixed in the beta branch, but due to some issues and time constraints I haven't been able to move from beta to a new stable release.

[SeanPM5]

Just updated to HA 2025.1 beta and Nest Protect integration fails to set up because of this. I see from this thread that it's fixed in the beta branch of this integration, but just wanted to give a heads up that it's about to break for everyone on the stable branch in a week from now.

Logger: homeassistant.config_entries
Source: config_entries.py:640

Error setting up entry Nest Protect for nest_protect
Traceback (most recent call last):
  File "/usr/src/homeassistant/homeassistant/config_entries.py", line 640, in __async_setup_with_context
    result = await component.async_setup_entry(hass, self)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/config/custom_components/nest_protect/__init__.py", line 104, in async_setup_entry
    await hass.config_entries.async_forward_entry_setups(entry, PLATFORMS)
  File "/usr/src/homeassistant/homeassistant/config_entries.py", line 2278, in async_forward_entry_setups
    await integration.async_get_platforms(platforms)
  File "/usr/src/homeassistant/homeassistant/loader.py", line 1185, in async_get_platforms
    import_future.result()
    ~~~~~~~~~~~~~~~~~~~~^^
  File "/usr/src/homeassistant/homeassistant/loader.py", line 1185, in async_get_platforms
    import_future.result()
    ~~~~~~~~~~~~~~~~~~~~^^
  File "/usr/src/homeassistant/homeassistant/loader.py", line 1185, in async_get_platforms
    import_future.result()
    ~~~~~~~~~~~~~~~~~~~~^^
  [Previous line repeated 1 more time]
  File "/usr/src/homeassistant/homeassistant/loader.py", line 1173, in async_get_platforms
    platforms.update(self._load_platforms(platform_names))
                     ~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/loader.py", line 1098, in _load_platforms
    platform_name: self._load_platform(platform_name)
                   ~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/loader.py", line 1272, in _load_platform
    cache[full_name] = self._import_platform(platform_name)
                       ~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^
  File "/usr/src/homeassistant/homeassistant/loader.py", line 1304, in _import_platform
    return importlib.import_module(f"{self.pkg_path}.{platform_name}")
           ~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  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 "<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/nest_protect/sensor.py", line 14, in <module>
    from homeassistant.const import PERCENTAGE, TEMP_CELSIUS
ImportError: cannot import name 'TEMP_CELSIUS' from 'homeassistant.const' (/usr/src/homeassistant/homeassistant/const.py)

[iMicknl]

Thanks for the heads-up, @SeanPM5! I will merge the current beta to main, or do a quick hotfix for this issue, prior to the release.