--- title: "MQTT notify" description: "Instructions on how to integrate MQTT notify entities into Home Assistant." ha_category: - Notifications ha_release: 2024.5 ha_iot_class: Configurable ha_domain: mqtt --- The **MQTT notify** platform lets you send an MQTT message when the `send_message` service is called. This can be used to expose a service of a remote device that allows processing a message, such as showing it on a screen. ## Configuration ```yaml # Example configuration.yaml entry mqtt: - notify: command_topic: "home/living_room/status_screen/notifications" ``` {% configuration %} availability: description: A list of MQTT topics subscribed to receive availability (online/offline) updates. Must not be used together with `availability_topic`. required: false type: list keys: payload_available: description: The payload that represents the available state. required: false type: string default: online payload_not_available: description: The payload that represents the unavailable state. required: false type: string default: offline topic: description: An MQTT topic subscribed to receive availability (online/offline) updates. required: true type: string value_template: description: "Defines a [template](/docs/configuration/templating/#using-templates-with-the-mqtt-integration) to extract the device's availability from the `topic`. To determine the device's availability, the result of this template will be compared to `payload_available` and `payload_not_available`." required: false type: template availability_mode: description: 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. required: false type: string default: latest availability_template: description: "Defines a [template](/docs/configuration/templating/#using-templates-with-the-mqtt-integration) to extract the device's availability from the `availability_topic`. To determine the device's availability result, the template will be compared to `payload_available` and `payload_not_available`." required: false type: template availability_topic: description: The MQTT topic subscribed to receive availability (online/offline) updates. Must not be used together with `availability`. required: false type: string command_template: description: Defines a [template](/docs/configuration/templating/#using-templates-with-the-mqtt-integration) to generate the payload to send to `command_topic`. required: false type: template command_topic: description: The MQTT topic to publish send message commands at. required: false type: string device: description: "Information about the device this notify entity is a part of to tie it into the [device registry](https://developers.home-assistant.io/docs/en/device_registry_index.html). Only works when [`unique_id`](#unique_id) is set. At least one of the identifiers or connections must be present to identify the device." required: false type: map keys: configuration_url: description: 'A link to the webpage that can manage the configuration of this device. Can be either an `http://`, `https://` or an internal `homeassistant://` URL.' required: false type: string connections: description: '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"]]`.' required: false type: list hw_version: description: The hardware version of the device. required: false type: string identifiers: description: A list of IDs that uniquely identify the device. For example, a serial number. required: false type: [string, list] manufacturer: description: The manufacturer of the device. required: false type: string model: description: The model of the device. required: false type: string name: description: The name of the device. required: false type: string serial_number: description: "The serial number of the device." required: false type: string suggested_area: description: 'Suggest an area if the device isn’t in one yet.' required: false type: string sw_version: description: The firmware version of the device. required: false type: string via_device: description: '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.' required: false type: string enabled_by_default: description: Flag which defines if the entity should be enabled when first added. required: false type: boolean default: true encoding: description: The encoding of the published messages. required: false type: string default: "utf-8" entity_category: description: The [category](https://developers.home-assistant.io/docs/core/entity#generic-properties) of the entity. required: false type: string icon: description: "[Icon](/docs/configuration/customizing-devices/#icon) for the entity." required: false type: icon json_attributes_template: description: "Defines a [template](/docs/configuration/templating/#using-templates-with-the-mqtt-integration) to extract the JSON dictionary from messages received on the `json_attributes_topic`. Usage example can be found in [MQTT sensor](/integrations/sensor.mqtt/#json-attributes-template-configuration) documentation." required: false type: template json_attributes_topic: description: The MQTT topic subscribed to receive a JSON dictionary payload and then set as sensor attributes. Usage example can be found in [MQTT sensor](/integrations/sensor.mqtt/#json-attributes-topic-configuration) documentation. required: false type: string name: description: The name to use when displaying this notify entity. Can be set to `null` if only the device name is relevant. required: false type: string default: MQTT notify object_id: description: Used instead of `name` for automatic generation of `entity_id` required: false type: string payload_available: description: The payload that represents the available state. required: false type: string default: online payload_not_available: description: The payload that represents the unavailable state. required: false type: string default: offline qos: description: The maximum QoS level to be used when receiving and publishing messages. required: false type: integer default: 0 retain: description: If the published message should have the retain flag on or not. required: false type: boolean default: false unique_id: description: An ID that uniquely identifies this notify entity. If two notify entities have the same unique ID, Home Assistant will raise an exception. required: false type: string {% endconfiguration %}
Make sure that your topic matches exactly. `some-topic/` and `some-topic` are different topics.
## Examples In this section, you will find some real-life examples of how to use this feature. ### Full configuration The example below shows a full configuration for a notify entity. ```yaml # Example configuration.yaml entry mqtt: - notify: unique_id: living_room_stat_scr01 name: "Living room status screen" command_topic: "home/living_room/status_screen/notifications" availability: - topic: "home/living_room/status_screen/available" qos: 0 retain: false ```