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---
title: "MQTT Lock"
description: "Instructions on how to integrate MQTT locks into Home Assistant."
ha_category:
- Lock
ha_release: 0.15
ha_iot_class: Configurable
ha_domain: mqtt
---
The `mqtt` lock platform lets you control your MQTT enabled locks.
## Configuration
In an ideal scenario, the MQTT device will have a `state_topic` to publish state changes. If these messages are published with a `RETAIN` flag, the MQTT lock will receive an instant state update after subscription and will start with correct state. Otherwise, the initial state of the lock will be `false` / unlocked.
When a `state_topic` is not available, the lock will work in optimistic mode. In this mode, the lock will immediately change state after every command. Otherwise, the lock will wait for state confirmation from the device (message from `state_topic`).
Optimistic mode can be forced, even if state topic is available. Try to enable it, if experiencing incorrect lock operation.
It's mandatory for locks to support `lock` and `unlock`. A lock may optionally support `open`, (e.g. to open the bolt in addition to the latch), in this case, `payload_open` is required in the configuration. If the lock is in optimistic mode, it will change states to `unlocked` when handling the `open` command.
An MQTT lock can also report the intermediate states `unlocking`, `locking` or `jammed` if the motor reports a jammed state.
<a id='new_format'></a>
To enable MQTT locks in your installation, add the following to your `configuration.yaml` file:
```yaml
# Example configuration.yaml entry
mqtt:
lock:
- command_topic: "home/frontdoor/set"
```
{% 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 device's availability from the `topic`. To determine the devices's availability 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 device's availability from the `availability_topic`. To determine the devices's availability result of this 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
code_format:
description: A regular expression to validate a supplied code when it is set during the service call to `open`, `lock` or `unlock` the MQTT lock.
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`. The lock command template accepts the parameters `value` and `code`. The `value` parameter will contain the configured value for either `payload_open`, `payload_lock` or `payload_unlock`. The `code` parameter is set during the service call to `open`, `lock` or `unlock` the MQTT lock and will be set `None` if no code was passed.
required: false
type: template
command_topic:
description: The MQTT topic to publish commands to change the lock state.
required: true
type: string
device:
description: 'Information about the device this lock is a part of to tie it into the [device registry](https://developers.home-assistant.io/docs/en/device_registry_index.html). Only works through [MQTT discovery](/integrations/mqtt/#mqtt-discovery) and when [`unique_id`](#unique_id) is set. At least one of 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 or HTTPS link.'
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
suggested_area:
description: 'Suggest an area if the device isnt 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 payloads received and published messages. Set to `""` to disable decoding of incoming payload.
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
default: None
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 of the lock.
required: false
type: string
default: MQTT Lock
object_id:
description: Used instead of `name` for automatic generation of `entity_id`
required: false
type: string
optimistic:
description: Flag that defines if lock works in optimistic mode.
required: false
type: boolean
default: "`true` if no `state_topic` defined, else `false`."
payload_available:
description: The payload that represents the available state.
required: false
type: string
default: online
payload_lock:
description: The payload sent to the lock to lock it.
required: false
type: string
default: LOCK
payload_not_available:
description: The payload that represents the unavailable state.
required: false
type: string
default: offline
payload_unlock:
description: The payload sent to the lock to unlock it.
required: false
type: string
default: UNLOCK
payload_open:
description: The payload sent to the lock to open it.
required: false
type: string
default: OPEN
qos:
description: The maximum QoS level of the state topic. It will also be used for messages published to command topic.
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
state_jammed:
description: The payload sent to `state_topic` by the lock when it's jammed.
required: false
type: string
default: JAMMED
state_locked:
description: The payload sent to `state_topic` by the lock when it's locked.
required: false
type: string
default: LOCKED
state_locking:
description: The payload sent to `state_topic` by the lock when it's locking.
required: false
type: string
default: LOCKING
state_topic:
description: The MQTT topic subscribed to receive state updates. It accepts states configured with `state_jammed`, `state_locked`, `state_unlocked`, `state_locking` or `state_unlocking`.
required: false
type: string
state_unlocked:
description: The payload sent to `state_topic` by the lock when it's unlocked.
required: false
type: string
default: UNLOCKED
state_unlocking:
description: The payload sent to `state_topic` by the lock when it's unlocking.
required: false
type: string
default: UNLOCKING
unique_id:
description: An ID that uniquely identifies this lock. If two locks have the same unique ID, Home Assistant will raise an exception.
required: false
type: string
value_template:
description: Defines a [template](/docs/configuration/templating/#using-templates-with-the-mqtt-integration) to extract a state value from the payload.
required: false
type: template
{% endconfiguration %}
<div class='note warning'>
Make sure that your topics match exactly. `some-topic/` and `some-topic` are different topics.
</div>
## Examples
In this section you will find some real-life examples of how to use this lock.
### Full configuration
The example below shows a full configuration for a MQTT lock.
{% raw %}
```yaml
# Example configuration.yaml entry
mqtt:
lock:
- name: Frontdoor
state_topic: "home-assistant/frontdoor/state"
code_format: "^\\d{4}$"
command_topic: "home-assistant/frontdoor/set"
command_template: '{ "action": "{{ value }}", "code":"{{ code }}" }'
payload_lock: "LOCK"
payload_unlock: "UNLOCK"
state_locked: "LOCK"
state_unlocked: "UNLOCK"
state_locking: "LOCKING"
state_unlocking: "UNLOCKING"
state_jammed: "MOTOR_JAMMED"
state_ok: "MOTOR_OK"
optimistic: false
qos: 1
retain: true
value_template: "{{ value.x }}"
```
{% endraw %}
Keep an eye on retaining messages to keep the state as you don't want to unlock your door by accident when you restart something.
For a check you can use the command line tools `mosquitto_pub` shipped with `mosquitto` to send MQTT messages. This allows you to operate your lock manually:
```bash
mosquitto_pub -h 127.0.0.1 -t home-assistant/frontdoor/set -m "LOCK"
```