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350 lines
9.8 KiB
ReStructuredText
Select Component
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================
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.. seo::
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:description: Instructions for setting up select components in ESPHome.
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:image: folder-open.svg
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ESPHome has support for components to create a select entity. A select entity is
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basically an option list that can be set by either yaml, hardware or the user/frontend.
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.. note::
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Home Assistant Core 2021.8 or higher is required for ESPHome select entities to work.
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.. _config-select:
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Base Select Configuration
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-------------------------
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All selects in ESPHome have a name and an optional icon.
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.. code-block:: yaml
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# Example select configuration
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name: Livingroom Mood
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id: my_select
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# Optional variables:
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icon: "mdi:emoticon-outline"
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Configuration variables:
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- **name** (**Required**, string): The name for the select.
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- **icon** (*Optional*, icon): Manually set the icon to use for the select in the frontend.
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- **internal** (*Optional*, boolean): Mark this component as internal. Internal components will
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not be exposed to the frontend (like Home Assistant). Only specifying an ``id`` without
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a ``name`` will implicitly set this to true.
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- **disabled_by_default** (*Optional*, boolean): If true, then this entity should not be added to any client's frontend,
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(usually Home Assistant) without the user manually enabling it (via the Home Assistant UI).
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Requires Home Assistant 2021.9 or newer. Defaults to ``false``.
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- **entity_category** (*Optional*, string): The category of the entity.
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See https://developers.home-assistant.io/docs/core/entity/#generic-properties
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for a list of available options. Requires Home Assistant 2021.11 or newer.
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Set to ``""`` to remove the default entity category.
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Automations:
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- **on_value** (*Optional*, :ref:`Automation <automation>`): An automation to perform
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when a new value is published. See :ref:`select-on_value`.
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MQTT Options:
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- All other options from :ref:`MQTT Component <config-mqtt-component>`.
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Select Automation
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-----------------
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You can access the most recent state of the select in :ref:`lambdas <config-lambda>` using
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``id(select_id).state``.
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For more information on using lambdas with select, see :ref:`select-lambda_calls`.
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.. _select-on_value:
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``on_value``
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************
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This automation will be triggered when a new value is published. In :ref:`Lambdas <config-lambda>`
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you can get the value from the trigger with ``x`` and the index offset of the selected value with ``i``.
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.. code-block:: yaml
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select:
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- platform: template
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# ...
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on_value:
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then:
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- logger.log:
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format: "Chosen option: %s (index %d)"
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args: ["x.c_str()", "i"]
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Configuration variables: See :ref:`Automation <automation>`.
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.. _select-set_action:
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``select.set`` Action
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*********************
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This is an :ref:`Action <config-action>` for setting the active option using an option value.
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.. code-block:: yaml
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- select.set:
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id: my_select
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option: "Happy"
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Configuration variables:
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- **id** (**Required**, :ref:`config-id`): The ID of the select to set.
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- **option** (**Required**, string, :ref:`templatable <config-templatable>`):
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The option to set the select to.
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When a non-existing option value is used, a warning is logged and the state of
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the select is left as-is.
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.. _select-set_index_action:
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``select.set_index`` Action
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***************************
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This is an :ref:`Action <config-action>` for setting the active option using its index offset.
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.. code-block:: yaml
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- select.set_index:
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id: my_select
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index: 3
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Configuration variables:
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- **id** (**Required**, :ref:`config-id`): The ID of the select to set.
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- **index** (**Required**, int, :ref:`templatable <config-templatable>`):
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The index offset of the option to be activated.
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When a non-existing index value is used, a warning is logged and the state of
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the select is left as-is.
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.. _select-next_action:
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``select.next`` Action
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**********************
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This is an :ref:`Action <config-action>` for selecting the next option in a select component.
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.. code-block:: yaml
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- select.next:
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id: my_select
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cycle: false
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# Shorthand
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- select.next: my_select
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Configuration variables:
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- **id** (**Required**, :ref:`config-id`): The ID of the select to set.
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- **cycle** (**Optional**, boolean): Whether or not to jump back to the first option
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of the select when the last option is currently selected. Defaults to ``true``.
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.. _select-previous_action:
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``select.previous`` Action
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**************************
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This is an :ref:`Action <config-action>` for selecting the previous option in
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a select component.
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.. code-block:: yaml
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- select.previous:
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id: my_select
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cycle: true
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# Shorthand
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- select.previous: my_select
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Configuration variables:
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- **id** (**Required**, :ref:`config-id`): The ID of the select to set.
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- **cycle** (**Optional**, boolean): Whether or not to jump to the last option
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of the select when the first option is currently selected. Defaults to ``true``.
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.. _select-first_action:
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``select.first`` Action
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***********************
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This is an :ref:`Action <config-action>` for selecting the first option in
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a select component.
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.. code-block:: yaml
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- select.first:
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id: my_select
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# Shorthand
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- select.first: my_select
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Configuration variables:
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- **id** (**Required**, :ref:`config-id`): The ID of the select to set.
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.. _select-last_action:
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``select.last`` Action
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**********************
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This is an :ref:`Action <config-action>` for selecting the last option in
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a select component.
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.. code-block:: yaml
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- select.last:
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id: my_select
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# Shorthand
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- select.last: my_select
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Configuration variables:
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- **id** (**Required**, :ref:`config-id`): The ID of the select to set.
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.. _select-operation_action:
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``select.operation`` Action
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***************************
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This is an :ref:`Action <config-action>` that can be used to change the active
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option in a select component (first, last, previous or next), using a generic
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templatable action call.
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.. code-block:: yaml
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# Using values
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- select.operation:
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id: my_select
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operation: Next
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cycle: true
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# Or templated (lambdas)
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- select.operation:
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id: my_select
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operation: !lambda "return SELECT_OP_NEXT;"
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cycle: !lambda "return true;"
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Configuration variables:
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- **id** (**Required**, :ref:`config-id`): The ID of the select to set.
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- **operation** (**Required**, string, :ref:`templatable <config-templatable>`): The
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operation to perform. One of ``FIRST``, ``LAST``, ``PREVIOUS`` or
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``NEXT`` (case insensitive). When writing a lambda for this field, then return
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one of the following enum values: ``SELECT_OP_FIRST``, ``SELECT_OP_LAST``,
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``SELECT_OP_PREVIOUS`` or ``SELECT_OP_NEXT``.
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- **cycle** (**Optional**, bool, :ref:`templatable <config-templatable>`):
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Can be used for options ``NEXT`` and ``PREVIOUS`` to specify whether or not to
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wrap around the options list when respectively the last or first option in
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the select is currently active.
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.. _select-lambda_calls:
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lambda calls
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************
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From :ref:`lambdas <config-lambda>`, you can call several methods on all selects to do some
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advanced stuff (see the full API Reference for more info).
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- ``.make_call()``: Create a call for changing the select state.
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.. code-block:: cpp
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// Within lambda, select the "Happy" option.
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auto call = id(my_select).make_call();
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call.set_option("Happy");
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call.perform();
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Check the API reference for information on the methods that are available for
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the ``SelectCall`` object. You can for example also use ``call.select_first()``
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to select the first option or ``call.select_next(true)`` to select the next
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option with the cycle feature enabled.
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- ``.state``: Retrieve the currently selected option of the select.
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.. code-block:: cpp
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// For example, create a custom log message when an option is selected:
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auto state = id(my_select).state.c_str();
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ESP_LOGI("main", "Option of my select: %s", state);
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- ``.size()``: Retrieve the number of options in the select.
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.. code-block:: cpp
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auto size = id(my_select).size();
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ESP_LOGI("main", "Select has %d options", size);
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- ``.index_of(<option value>)``: Retrieve the index offset for an option value.
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.. code-block:: cpp
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auto index = id(my_select).index_of("Happy");
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if (index.has_value()) {
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ESP_LOGI("main", "'Happy' is at index: %d", index.value());
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} else {
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ESP_LOGE("main", "There is no option 'Happy'");
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}
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- ``.active_index()``: Retrieve the index of the currently active option.
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.. code-block:: cpp
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auto index = id(my_select).active_index();
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if (index.has_value()) {
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ESP_LOGI("main", "Option at index %d is active", index);
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} else {
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ESP_LOGI("main", "No option is active");
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}
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- ``.at(<index offset>)``: Retrieve the option value at a given index offset.
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.. code-block:: cpp
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auto index = 1;
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auto option = id(my_select).at(index);
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if (option.has_value()) {
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auto value = option.value();
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ESP_LOGI("main", "Option at %d is: %s", index, value);
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} else {
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ESP_LOGE("main", "Index %d does not exist", index);
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}
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- ``.has_option(<option value>)``: Check if the select contains the given option value.
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.. code-block:: cpp
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auto option = "Happy";
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if (id(my_select).has_option(option)) {
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ESP_LOGI("main", "Select has option '%s'", option);
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}
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- ``.has_index(<index offset>)``: Check if the select contains an option value for the given index offset.
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.. code-block:: cpp
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auto index = 3;
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if (id(my_select).has_index(index)) {
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ESP_LOGI("main", "Select has index offset %d", index);
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}
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See Also
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--------
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- :apiref:`Select <select/select.h>`
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- :apiref:`SelectCall <select/select_call.h>`
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- :ghedit:`Edit`
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.. toctree::
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:maxdepth: 1
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:glob:
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*
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