[Bug]: Temperature Unit of Measurement causes issue if used in combined state helper

[casaben007]

Describe the bug

If I create a helper that combines the state of several sensors, and I try to do a temperature one, then I get ERR for the result.
Individually the sensor displays the correct value.
I looked for the solution where it said to change Unit of Measurement to °C but there is no such option in the entity.
Probable cause :
The Loxone miniserver is sending the format string with just ° instead of °C. The clean_unit function extracts ° from the format string, but the SENSOR_TYPES temperature entry only matches °C and °F (UnitOfTemperature.CELSIUS / UnitOfTemperature.FAHRENHEIT).

Fix that worked
In the file custom_components/loxone/helpers.py, I added :
142 unit = lox_format.replace(search.group(0).strip(), "").strip()
143 if unit == "%%":
144 unit = "%"
145 + if unit == "°":
146 + unit = "°C"
147 return unit
148 return lox_format

Firmware of your Miniserver

16.1.11.6

HomeAssistant install method

Hassio

Version of HomeAssistant

Installation method Home Assistant OS
Core 2026.5.1
Supervisor 2026.05.0
Operating System 17.3
Frontend 20260429.3

Version of Pyloxone

0.9.13

Update pyloxone

Yes

Log

Settings for the log can be found on the main page under the section Log Configuration

[JoDehli]

@jmartasek can you take a look for this problem? I think you did a lot of the automatic discovery stuff.

[jmartasek]

@casaben007 - shall you not update your Loxone sensor to use °C? The heuristics cannot figure out if this is Celsius or Fahrenheit (or Kelvin).

If you need to override anything - you can always use https://github.com/JoDehli/PyLoxone#overriding-the-detected-device-class

[JoDehli]

@jmartasek thanks for your answer.

@casaben007 I think we can close the issue?