home-assistant.io/source/_components/switch.mqtt.markdown

layout	title	description	date	sidebar	comments	sharing	footer	logo	ha_category	ha_release	ha_iot_class
page	MQTT Switch	Instructions how to integrate MQTT switches into Home Assistant.	2015-08-30 23:38	true	false	true	true	mqtt.png	Switch	0.7	depends

The mqtt switch platform lets you control your MQTT enabled switches.

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 switch will receive an instant state update after subscription, and will start with the correct state. Otherwise, the initial state of the switch will be false / off.

When a state_topic is not available, the switch will work in optimistic mode. In this mode, the switch will immediately change state after every command. Otherwise, the switch will wait for state confirmation from the device (message from state_topic).

Optimistic mode can be forced, even if the state_topic is available. Try to enable it, if experiencing incorrect switch operation.

To enable this switch in your installation, add the following to your configuration.yaml file:

# Example configuration.yml entry
switch:
  - platform: mqtt
    command_topic: "home/bedroom/switch1/set"

{% configuration %} name: description: The name to use when displaying this switch. required: false type: string default: MQTT Switch state_topic: description: The MQTT topic subscribed to receive state updates. required: false type: string command_topic: description: The MQTT topic to publish commands to change the switch state. required: false type: string availability_topic: description: The MQTT topic subscribed to receive availability (online/offline) updates. required: false type: string payload_on: description: The payload that represents enabled state. required: false type: string default: ON payload_off: description: The payload that represents disabled state. required: false type: string default: OFF 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 optimistic: description: Flag that defines if switch works in optimistic mode. required: false type: boolean default: "true if no state_topic defined, else false." qos: description: The maximum QoS level of the state topic. Default is 0 and will also be used to 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 value_template: description: "Defines a template to extract a value from the payload." required: false type: string {% endconfiguration %}

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

{% linkable_title Examples %}

In this section you will find some real life examples of how to use this sensor.

{% linkable_title Full configuration %}

The example below shows a full configuration for a switch.

# Example configuration.yml entry
switch:
  - platform: mqtt
    name: "Bedroom Switch"
    state_topic: "home/bedroom/switch1"
    command_topic: "home/bedroom/switch1/set"
    availability_topic: "home/bedroom/switch1/available"
    payload_on: "ON"
    payload_off: "OFF"
    optimistic: false
    qos: 0
    retain: true

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 switch manually:

$ mosquitto_pub -h 127.0.0.1 -t home/bedroom/switch1 -m "ON"

{% linkable_title Set the state of a device with ESPEasy %}

Assuming that you have flashed your ESP8266 unit with ESPEasy. Under "Config" is a name ("Unit Name:") set for your device (here it's "bathroom"). A configuration for a "Controller" for MQTT with the protocol "OpenHAB MQTT" is present and the entries ("Controller Subscribe:" and "Controller Publish:") are adjusted to match your needs. In this example the topics are prefixed with "home". There is no further configuration needed as the GPIOs can be controlled with MQTT directly.

Manually you can set pin 13 to high with mosquitto_pub or another MQTT tool:

$ mosquitto_pub -h 127.0.0.1 -t home/bathroom/gpio/13 -m "1"

The configuration will look like the example below:

{% raw %}

# Example configuration.yml entry
switch:
  - platform: mqtt
    name: bathroom
    state_topic: "home/bathroom/gpio/13"
    command_topic: "home/bathroom/gpio/13"
    payload_on: "1"
    payload_off: "0"

{% endraw %}