mirror of
https://github.com/esphome/esphome-docs.git
synced 2024-11-09 10:02:45 +01:00
91 lines
2.4 KiB
ReStructuredText
91 lines
2.4 KiB
ReStructuredText
Template Sensor
|
|
===============
|
|
|
|
.. seo::
|
|
:description: Instructions for setting up template sensors with ESPHome.
|
|
:image: description.svg
|
|
|
|
The ``template`` sensor platform allows you to create a sensor with templated values
|
|
using :ref:`lambdas <config-lambda>`.
|
|
|
|
.. code-block:: yaml
|
|
|
|
# Example configuration entry
|
|
sensor:
|
|
- platform: template
|
|
name: "Template Sensor"
|
|
lambda: |-
|
|
if (id(some_binary_sensor).state) {
|
|
return 42.0;
|
|
} else {
|
|
return 0.0;
|
|
}
|
|
update_interval: 60s
|
|
|
|
|
|
Possible return values for the lambda:
|
|
|
|
- ``return <FLOATING_POINT_NUMBER>;`` the new value for the sensor.
|
|
- ``return NAN;`` if the state should be considered invalid to indicate an error (advanced).
|
|
- ``return {};`` if you don't want to publish a new state (advanced).
|
|
|
|
Configuration variables:
|
|
------------------------
|
|
|
|
- **name** (**Required**, string): The name of the sensor.
|
|
- **lambda** (*Optional*, :ref:`lambda <config-lambda>`):
|
|
Lambda to be evaluated every update interval to get the new value of the sensor
|
|
- **update_interval** (*Optional*, :ref:`config-time`): The interval to check the
|
|
sensor. Set to ``never`` to disable updates. Defaults to ``60s``.
|
|
- **id** (*Optional*, :ref:`config-id`): Manually specify the ID used for code generation.
|
|
- All other options from :ref:`Sensor <config-sensor>`.
|
|
|
|
.. _sensor-template-publish_action:
|
|
|
|
``sensor.template.publish`` Action
|
|
----------------------------------
|
|
|
|
You can also publish a state to a template sensor from elsewhere in your YAML file
|
|
with the ``sensor.template.publish`` action.
|
|
|
|
.. code-block:: yaml
|
|
|
|
# Example configuration entry
|
|
sensor:
|
|
- platform: template
|
|
name: "Template Sensor"
|
|
id: template_sens
|
|
|
|
# in some trigger
|
|
on_...:
|
|
- sensor.template.publish:
|
|
id: template_sens
|
|
state: 42.0
|
|
|
|
# Templated
|
|
- sensor.template.publish:
|
|
id: template_sens
|
|
state: !lambda 'return 42.0;'
|
|
|
|
Configuration options:
|
|
|
|
- **id** (**Required**, :ref:`config-id`): The ID of the template sensor.
|
|
- **state** (**Required**, float, :ref:`templatable <config-templatable>`):
|
|
The state to publish.
|
|
|
|
.. note::
|
|
|
|
This action can also be written in lambdas:
|
|
|
|
.. code-block:: cpp
|
|
|
|
id(template_sens).publish_state(42.0);
|
|
|
|
See Also
|
|
--------
|
|
|
|
- :ref:`sensor-filters`
|
|
- :ref:`automation`
|
|
- :apiref:`template/sensor/template_sensor.h`
|
|
- :ghedit:`Edit`
|