esphome-docs/components/switch/index.rst

Switch Component
================

.. seo::
    :description: Instructions for setting up generic switches in ESPHome.
    :image: folder-open.png

The ``switch`` domain includes all platforms that should show up like a
switch and can only be turned ON or OFF.

.. _config-switch:

Base Switch Configuration
-------------------------

.. code-block:: yaml

    switch:
      - platform: ...
        name: "Switch Name"
        icon: "mdi:restart"

Configuration variables:

- **name** (**Required**, string): The name of the switch.
- **icon** (*Optional*, icon): Manually set the icon to use for the
  sensor in the frontend.
- **inverted** (*Optional*, boolean): Whether to invert the binary
  state, i.e. report ON states as OFF and vice versa. Defaults
  to ``false``.
- **internal** (*Optional*, boolean): Mark this component as internal. Internal components will
  not be exposed to the frontend (like Home Assistant). Only specifying an ``id`` without
  a ``name`` will implicitly set this to true.
- **on_turn_on** (*Optional*, :ref:`Action <config-action>`): An automation to perform
  when the switch is turned on. See :ref:`switch-on_turn_on_off_trigger`.
- **on_turn_off** (*Optional*, :ref:`Action <config-action>`): An automation to perform
  when the switch is turned off. See :ref:`switch-on_turn_on_off_trigger`.
- **disabled_by_default** (*Optional*, boolean): If true, then this entity should not be added to any client's frontend,
  (usually Home Assistant) without the user manually enabling it (via the Home Assistant UI).
  Requires Home Assistant 2021.9 or newer. Defaults to ``false``.
- **entity_category** (*Optional*, string): The category of the entity.
  See https://developers.home-assistant.io/docs/core/entity/#generic-properties
  for a list of available options. Requires Home Assistant 2021.11 or newer.
  Set to ``""`` to remove the default entity category.
- If MQTT enabled, All other options from :ref:`MQTT Component <config-mqtt-component>`.

.. _switch-toggle_action:

``switch.toggle`` Action
************************

This action toggles a switch with the given ID when executed.

.. code-block:: yaml

    on_...:
      then:
        - switch.toggle: relay_1

.. _switch-turn_on_action:

``switch.turn_on`` Action
*************************

This action turns a switch with the given ID on when executed.

.. code-block:: yaml

    on_...:
      then:
        - switch.turn_on: relay_1

.. _switch-turn_off_action:

``switch.turn_off`` Action
**************************

This action turns a switch with the given ID off when executed.

.. code-block:: yaml

    on_...:
      then:
        - switch.turn_off: relay_1

.. _switch-is_on_condition:
.. _switch-is_off_condition:

``switch.is_on`` / ``switch.is_off`` Condition
**********************************************

This :ref:`Condition <config-condition>` checks if the given switch is ON (or OFF).

.. code-block:: yaml

    # In some trigger:
    on_...:
      if:
        condition:
          # Same syntax for is_off
          switch.is_on: my_switch

.. _switch-lambda_calls:

lambda calls
************

From :ref:`lambdas <config-lambda>`, you can call several methods on all switches to do some
advanced stuff (see the full API Reference for more info).

- ``publish_state()``: Manually cause the switch to publish a new state and store it internally.
  If it's different from the last internal state, it's additionally published to the frontend.

  .. code-block:: yaml

      // Within lambda, make the switch report a specific state
      id(my_switch).publish_state(false);
      id(my_switch).publish_state(true);

- ``state``: Retrieve the current state of the switch.

  .. code-block:: yaml

      // Within lambda, get the switch state and conditionally do something
      if (id(my_switch).state) {
        // Switch is ON, do something here
      } else {
        // Switch is OFF, do something else here
      }

- ``turn_off()``/``turn_on()``: Manually turn the switch ON/OFF from code.
  Similar to the ``switch.turn_on`` and ``switch.turn_off`` actions,
  but can be used in complex lambda expressions.

  .. code-block:: yaml

      id(my_switch).turn_off();
      id(my_switch).turn_on();
      // Toggle the switch
      id(my_switch).toggle();

.. _switch-on_turn_on_off_trigger:

``switch.on_turn_on`` / ``switch.on_turn_off`` Trigger
******************************************************

This trigger is activated each time the switch is turned on. It becomes active
right after the switch component has acknowledged the state (e.g. after it switched
ON/OFF itself).

.. code-block:: yaml

    switch:
      - platform: gpio  # or any other platform
        # ...
        on_turn_on:
        - logger.log: "Switch Turned On!"
        on_turn_off:
        - logger.log: "Switch Turned Off!"

See Also
--------

- :apiref:`switch/switch.h`
- :ghedit:`Edit`

.. toctree::
    :maxdepth: 1
    :glob:

    *