MQTT Number

The mqtt Number platform allows you to integrate devices that might expose configuration options through MQTT into Home Assistant as a Number. Every time a message under the topic in the configuration is received, the number entity will be updated in Home Assistant and vice-versa, keeping the device and Home Assistant in-sync.


To enable MQTT Number in your installation, add the following to your configuration.yamlThe configuration.yaml file is the main configuration file for Home Assistant. It lists the integrations to be loaded and their specific configurations. In some cases, the configuration needs to be edited manually directly in the configuration.yaml file. Most integrations can be configured in the UI.[Learn more] file:

# Example configuration.yaml entry
  - number:
      command_topic: my-device/threshold

Configuration Variables

availability list (Optional)

A list of MQTT topics subscribed to receive availability (online/offline) updates. Must not be used together with availability_topic.

payload_available string (Optional, default: online)

The payload that represents the available state.

payload_not_available string (Optional, default: offline)

The payload that represents the unavailable state.

topic string Required

An MQTT topic subscribed to receive availability (online/offline) updates.

availability_topic string (Optional)

The MQTT topic subscribed to receive availability (online/offline) updates. Must not be used together with availability.

availability_mode string (Optional, default: latest)

When availability is configured, this controls the conditions needed to set the entity to available. Valid entries are all, any, and latest. If set to all, payload_available must be received on all configured availability topics before the entity is marked as online. If set to any, payload_available must be received on at least one configured availability topic before the entity is marked as online. If set to latest, the last payload_available or payload_not_available received on any configured availability topic controls the availability.

command_template template (Optional)

Defines a template to generate the payload to send to command_topic.

command_topic string Required

The MQTT topic to publish commands to change the number.

device map (Optional)

Information about the device this Number is a part of to tie it into the device registry. Only works when unique_id is set. At least one of identifiers or connections must be present to identify the device.

configuration_url string (Optional)

A link to the webpage that can manage the configuration of this device. Can be either an http://, https:// or an internal homeassistant:// URL.

connections list (Optional)

A list of connections of the device to the outside world as a list of tuples [connection_type, connection_identifier]. For example the MAC address of a network interface: "connections": [["mac", "02:5b:26:a8:dc:12"]].

hw_version string (Optional)

The hardware version of the device.

identifiers list | string (Optional)

A list of IDs that uniquely identify the device. For example a serial number.

manufacturer string (Optional)

The manufacturer of the device.

model string (Optional)

The model of the device.

name string (Optional)

The name of the device.

serial_number string (Optional)

The serial number of the device.

suggested_area string (Optional)

Suggest an area if the device isn’t in one yet.

sw_version string (Optional)

The firmware version of the device.

via_device string (Optional)

Identifier of a device that routes messages between this device and Home Assistant. Examples of such devices are hubs, or parent devices of a sub-device. This is used to show device topology in Home Assistant.

device_class device_class (Optional)

The type/class of the number. The device_class can be null.

enabled_by_default boolean (Optional, default: true)

Flag which defines if the entity should be enabled when first added.

encoding string (Optional, default: utf-8)

The encoding of the payloads received and published messages. Set to "" to disable decoding of incoming payload.

entity_category string (Optional)

The category of the entity.

icon icon (Optional)

Icon for the entity.

json_attributes_template template (Optional)

Defines a template to extract the JSON dictionary from messages received on the json_attributes_topic.

json_attributes_topic string (Optional)

The MQTT topic subscribed to receive a JSON dictionary payload and then set as number attributes. Implies force_update of the current number state when a message is received on this topic.

min float (Optional, default: 1)

Minimum value.

max float (Optional, default: 100)

Maximum value.

mode string (Optional, default: “auto”)

Control how the number should be displayed in the UI. Can be set to box or slider to force a display mode.

name string (Optional)

The name of the Number. Can be set to null if only the device name is relevant.

object_id string (Optional)

Used instead of name for automatic generation of entity_id

optimistic boolean (Optional)

Flag that defines if number works in optimistic mode.


true if no state_topic defined, else false.

payload_reset string (Optional, default: “None”)

A special payload that resets the state to unknown when received on the state_topic.

qos integer (Optional, default: 0)

The maximum QoS level to be used when receiving and publishing messages.

retain boolean (Optional, default: false)

If the published message should have the retain flag on or not.

state_topic string (Optional)

The MQTT topic subscribed to receive number values.

step float (Optional, default: 1)

Step value. Smallest value 0.001.

unique_id string (Optional)

An ID that uniquely identifies this Number. If two Numbers have the same unique ID Home Assistant will raise an exception.

unit_of_measurement string (Optional)

Defines the unit of measurement of the sensor, if any. The unit_of_measurement can be null.

value_template template (Optional)

Defines a template to extract the value.

Make sure that your topic matches exactly. some-topic/ and some-topic are different topics.