Create MQTT components interfaces and documentation

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Adrian Jagielak
2025-07-24 15:54:47 +02:00
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/**
* Represents a MQTT Binary Sensor component for Home Assistant MQTT Discovery.
*
* The `mqtt` binary sensor platform uses an MQTT message received to set the binary sensor's state to `on`, `off` or `unknown`.
*
* For detailed documentation see:
* https://www.home-assistant.io/integrations/binary_sensor.mqtt/
*/
export interface BinarySensorComponent {
/**
* Must be `binary_sensor`.
* Only allowed and required in [MQTT auto discovery device messages](https://www.home-assistant.io/integrations/mqtt/#device-discovery-payload).
*/
platform: 'binary_sensor';
/**
* An ID that uniquely identifies this sensor.
* If two sensors have the same unique ID, Home Assistant will raise an exception.
* Required when used with device-based discovery.
*/
unique_id: string;
/**
* The MQTT topic subscribed to receive sensor's state.
* Valid states are `OFF` and `ON`.
* Custom `OFF` and `ON` values can be set with the `payload_off` and `payload_on` config options.
*/
state_topic?: string;
/**
* Sets the [class of the device](https://www.home-assistant.io/integrations/binary_sensor/#device-class),
* changing the device state and icon that is displayed on the frontend.
* The `device_class` can be `null`.
*/
device_class?: string | null;
/**
* The string that represents the `on` state.
* It will be compared to the message in the `state_topic` (see `value_template` for details).
* Default: "ON"
*/
payload_on?: string;
/**
* The string that represents the `off` state.
* It will be compared to the message in the `state_topic` (see `value_template` for details).
* Default: "OFF"
*/
payload_off?: string;
/**
* Defines a [template](https://www.home-assistant.io/docs/configuration/templating/#using-value-templates-with-mqtt)
* that returns a string to be compared to `payload_on`/`payload_off` or an empty string,
* in which case the MQTT message will be removed.
* Remove this option when `payload_on` and `payload_off` are sufficient to match your payloads
* (i.e no preprocessing of original message is required).
*/
value_template?: string;
/**
* Sends update events (which results in update of [state object](https://www.home-assistant.io/docs/configuration/state_object/)'s `last_changed`)
* even if the sensor's state hasn't changed. Useful if you want to have meaningful value graphs in history
* or want to create an automation that triggers on *every* incoming state message (not only when the sensor's new state is different to the current one).
* Default: false
*/
force_update?: boolean;
/**
* If set, it defines the number of seconds after the sensor's state expires,
* if it's not updated. After expiry, the sensor's state becomes `unavailable`.
* Default the sensor's state never expires.
*/
expire_after?: number;
/**
* The encoding of the payloads received.
* Set to `""` to disable decoding of incoming payload.
* Default: "utf-8"
*/
encoding?: string;
/**
* Flag which defines if the entity should be enabled when first added.
* Default: true
*/
enabled_by_default?: boolean;
/**
* The name of the binary sensor.
* Can be set to `null` if only the device name is relevant.
* Default: "MQTT binary sensor"
*/
name?: string | null;
/**
* Used instead of `name` for automatic generation of `entity_id`.
*/
object_id?: string;
/**
* The maximum QoS level to be used when receiving and publishing messages.
* Default: 0
*/
qos?: number;
/**
* The [category](https://developers.home-assistant.io/docs/core/entity/#generic-properties) of the entity.
* When set, the entity category must be `diagnostic` for sensors.
*/
entity_category?: string;
/**
* Picture URL for the entity.
*/
entity_picture?: string;
/**
* [Icon](https://www.home-assistant.io/docs/configuration/customizing-devices/#icon) for the entity.
*/
icon?: string;
/**
* Defines a [template](https://www.home-assistant.io/docs/configuration/templating/#using-value-templates-with-mqtt)
* to extract the JSON dictionary from messages received on the `json_attributes_topic`.
* Usage example can be found in [MQTT sensor](https://www.home-assistant.io/integrations/sensor.mqtt/#json-attributes-template-configuration) documentation.
*/
json_attributes_template?: string;
/**
* The MQTT topic subscribed to receive a JSON dictionary payload and then set as sensor attributes.
* Usage example can be found in [MQTT sensor](https://www.home-assistant.io/integrations/sensor.mqtt/#json-attributes-topic-configuration) documentation.
*/
json_attributes_topic?: string;
/**
* If set, the sensor will send `off` state after this amount of seconds when the sensor only sends `on` state updates.
*/
off_delay?: number;
/**
* A list of MQTT topics subscribed to receive availability (online/offline) updates.
* Must not be used together with `availability_topic`.
*/
availability?: Array<{
/**
* An MQTT topic subscribed to receive availability (online/offline) updates.
*/
topic: string;
/**
* The payload that represents the available state.
* Default: "online"
*/
payload_available?: string;
/**
* The payload that represents the unavailable state.
* Default: "offline"
*/
payload_not_available?: string;
/**
* Defines a [template](https://www.home-assistant.io/docs/configuration/templating/#using-value-templates-with-mqtt)
* to extract device's availability from the `topic`.
* To determine the device's availability, result of this template will be compared to `payload_available` and `payload_not_available`.
*/
value_template?: string;
}>;
/**
* When `availability` is configured, this controls the conditions needed to set the entity to `available`.
* Valid values: "all", "any", "latest"
* Default: "latest"
*/
availability_mode?: 'all' | 'any' | 'latest';
/**
* Defines a [template](https://www.home-assistant.io/docs/configuration/templating/#using-value-templates-with-mqtt)
* to extract device's availability from the `availability_topic`.
* To determine the device's availability, result of this template will be compared to `payload_available` and `payload_not_available`.
*/
availability_template?: string;
/**
* The MQTT topic subscribed to receive birth and LWT messages from the MQTT device.
* If `availability` is not defined, the binary sensor will always be considered `available` and its state will be `on`, `off` or `unknown`.
* If `availability` is defined, the binary sensor will be considered as `unavailable` by default and the sensor's initial state will be `unavailable`.
* Must not be used together with `availability`.
*/
availability_topic?: string;
/**
* The string that represents the `online` state.
* Default: "online"
*/
payload_available?: string;
/**
* The string that represents the `offline` state.
* Default: "offline"
*/
payload_not_available?: string;
/**
* Information about the device this binary sensor is a part of to tie it into the [device registry](https://developers.home-assistant.io/docs/device_registry_index/).
* Only works when [`unique_id`](#unique_id) is set.
* At least one of identifiers or connections must be present to identify the device.
*/
device?: {
/**
* A link to the webpage that can manage the configuration of this device.
* Can be either an `http://`, `https://` or an internal `homeassistant://` URL.
*/
configuration_url?: string;
/**
* 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"]]`.
*/
connections?: Array<[string, string]>;
/**
* The hardware version of the device.
*/
hw_version?: string;
/**
* A list of IDs that uniquely identify the device.
* For example a serial number.
*/
identifiers?: string[];
/**
* The manufacturer of the device.
*/
manufacturer?: string;
/**
* The model of the device.
*/
model?: string;
/**
* The model identifier of the device.
*/
model_id?: string;
/**
* The name of the device.
*/
name?: string;
/**
* The serial number of the device.
*/
serial_number?: string;
/**
* Suggest an area if the device isnt in one yet.
*/
suggested_area?: string;
/**
* The firmware version of the device.
*/
sw_version?: string;
/**
* 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.
*/
via_device?: string;
};
}