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Temperature conversions moving to SensorEntity

· One min read

Temperature unit conversions are moving from the Entity base class to the SensorEntity base class. Unit conversions will only be done if the sensor's device_class attribute is set to DEVICE_CLASS_TEMPERATURE. If the device_class is not set or is not set to DEVICE_CLASS_TEMPERATURE temperature conversion will take place during a transition period and a warning will be logged.

To facilitate this, the sensor entity model has been updated with two new properties, native_value and native_unit_of_measurement. This allows us to add additional unit conversions in the future instead of relying on the integrations to do it themselves.

Sensor implementations should no longer implement the state() property function or set the _attr_state attribute. Sensor implementations should also not implement the unit_of_measurement property function, set the _attr_unit_of_measurement attribute or set the unit_of_measurement member of EntityDescription.

native_value#

The value reported by the sensor. The actual state written to the state machine may be modified by SensorEntity due to unit conversions.

native_unit_of_measurement#

The unit of measurement of the sensor, if any. The unit_of_measurement written to the state machine may be modified by SensorEntity due to unit conversions.