home-assistant.io/source/_integrations/device_trigger.mqtt.markdown
2020-02-28 10:36:07 +01:00

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---
title: "MQTT Device Trigger"
description: "Instructions on how to integrate MQTT device triggers within Home Assistant."
logo: mqtt.png
ha_category:
- Device Automation
ha_release: 0.106
ha_iot_class: Configurable
---
The `mqtt` device trigger platform uses an MQTT message payload to generate device trigger events.
An MQTT device trigger is a better option than a [binary sensor](/integrations/binary_sensor.mqtt/) for buttons, remote controls etc.
## Configuration
MQTT device triggers are only supported through [MQTT discovery](/docs/mqtt/discovery/), manual setup through `configuration.yaml` is not supported.
The discovery topic needs to be: `<discovery_prefix>/device_automation/[<node_id>/]<object_id>/config`.
{% configuration %}
automation_type:
description: The type of automation, must be 'device_trigger'.
required: true
type: string
payload:
description: Optional payload to match the payload being sent over the topic.
required: false
type: string
qos:
description: The maximum QoS level to be used when receiving messages.
required: false
type: integer
default: 0
topic:
description: The MQTT topic subscribed to receive trigger events.
required: true
type: string
type:
description: "The type of the trigger, e.g. `button_short_press`. Entries supported by the frontend: `button_short_press`, `button_short_release`, `button_long_press`, `button_long_release`, `button_double_press`, `button_triple_press`, `button_quadruple_press`, `button_quintuple_press`. If set to an unsupported value, will render as `subtype type`, e.g. `First button spammed` with `type` set to `spammed` and `subtype` set to `button_1`"
required: true
type: string
subtype:
description: "The subtype of the trigger, e.g. `button_1`. Entries supported by the frontend: `turn_on`, `turn_off`, `button_1`, `button_2`, `button_3`, `button_4`, `button_5`, `button_6`. If set to an unsupported value, will render as `subtype type`, e.g. `left_button pressed` with `type` set to `button_short_press` and `subtype` set to `left_button`"
required: true
type: string
device:
description: "Information about the device this device trigger is a part of to tie it into the [device registry](https://developers.home-assistant.io/docs/en/device_registry_index.html)."
required: true
type: map
keys:
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, map]
identifiers:
description: A list of IDs that uniquely identify the device. For example a serial number.
required: false
type: [list, string]
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
sw_version:
description: The firmware version of the device.
required: false
type: string
{% endconfiguration %}