developers.home-assistant/docs/core/entity/number.md

title	sidebar_label
Number Entity	Number

A number is an entity that allows the user to input an arbitrary value to an integration. Derive entity platforms from homeassistant.components.number.NumberEntity

Properties

:::tip Properties should always only return information from memory and not do I/O (like network requests). Implement update() or async_update() to fetch data. :::

Name	Type	Default	Description
device_class	string	None	Type of number.
mode	string	auto	Defines how the number should be displayed in the UI. It's recommended to use the default auto. Can be box or slider to force a display mode.
native_max_value	float	100	The maximum accepted value in the number's native_unit_of_measurement (inclusive)
native_min_value	float	0	The minimum accepted value in the number's native_unit_of_measurement (inclusive)
native_step	float	See below	Defines the resolution of the values, i.e. the smallest increment or decrement in the number's
native_value	float	Required	The value of the number in the number's native_unit_of_measurement.
native_unit_of_measurement

Other properties that are common to all entities such as icon, name etc are also applicable.

The default step value is dynamically chosen based on the range (max - min) values. If the difference between max_value and min_value is greater than 1.0, then the default step is 1.0. If, however, the range is smaller, then the step is iteratively divided by 10 until it becomes lower than the range.

Available device classes

If specifying a device class, your number entity will need to also return the correct unit of measurement.

Type	Supported units	Description
temperature	°C, °F	Temperature.

Restoring number states

Numbers which restore the state after restart or reload should not extend RestoreEntity because that does not store the native_value, but instead the state which may have been modifed by the number base entity. Numbers which restore the state should extend RestoreNumber and call await self.async_get_last_number_data from async_added_to_hass to get access to the stored native_min_value, native_max_value, native_step, native_unit_of_measurement and native_value.

Methods

Set value

Called when the user or an automation wants to update the value.

class MyNumber(NumberEntity):
    # Implement one of these methods.

    def set_native_value(self, value: float) -> None:
        """Update the current value."""

    async def async_set_native_value(self, value: float) -> None:
        """Update the current value."""