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

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:: 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``.
-  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:: yaml

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

.. _switch-turn_on_action:

``switch.turn_on`` Action
^^^^^^^^^^^^^^^^^^^^^^^^^

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

.. code:: yaml

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

.. _switch-turn_off_action:

``switch.turn_off`` Action
^^^^^^^^^^^^^^^^^^^^^^^^^^

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

.. code:: yaml

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

lambda calls
""""""""""""

From :ref:`lambdas <config-lambda>`, you can call several methods on all covers to do some
advanced stuff (see the full :doc:`API Reference </api/cover/index>` 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:: 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:: yaml

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

- ``write_state()``: Manually cause the cover to go into an OFF/ON state from code.
  Similar to the ``switch.turn_on`` and ``switch.turn_off`` actions,
  but can be used in complex lambda expressions.

  .. code:: yaml

      id(my_switch).write_state(false);
      id(my_switch).write_state(true);
      // Toggle the switch
      id(my_switch).write_state(!id(my_switch).state);

See Also
^^^^^^^^

- :doc:`API Reference </api/switch/index>`
- `Edit this page on GitHub <https://github.com/OttoWinter/esphomedocs/blob/current/esphomeyaml/components/switch/index.rst>`__

.. toctree::
    :maxdepth: 1

    gpio
    output
    remote_transmitter
    restart
    shutdown
    template
    uart