mirror of
https://github.com/esphome/esphome-docs.git
synced 2024-11-18 11:15:36 +01:00
69 lines
2.3 KiB
ReStructuredText
69 lines
2.3 KiB
ReStructuredText
Ultrasonic Distance Sensor
|
||
==========================
|
||
|
||
.. seo::
|
||
:description: Instructions for setting up ultrasonic distance measurement sensors in ESPHome.
|
||
:image: ultrasonic.jpg
|
||
:keywords: ultrasonic, hc-sr04
|
||
|
||
The ultrasonic distance sensor allows you to use simple ultrasonic
|
||
sensors like the HC-SR04
|
||
(`datasheet <https://www.electroschematics.com/wp-content/uploads/2013/07/HC-SR04-datasheet-version-2.pdf>`__,
|
||
`SparkFun <https://www.sparkfun.com/products/13959>`__) with ESPHome
|
||
to measure distances. These sensors usually can’t measure anything more
|
||
than about two meters and may sometimes make some annoying clicking
|
||
sounds.
|
||
|
||
This sensor platform expects a sensor that can be sent a **trigger
|
||
pulse** on a specific pin and will send out an **echo pulse** once a
|
||
measurement has been taken. Because sometimes (for example if no object
|
||
is detected) the echo pulse is never returned, this sensor also has a
|
||
timeout option which specifies how long to wait for values.
|
||
|
||
.. figure:: images/ultrasonic-full.jpg
|
||
:align: center
|
||
:width: 50.0%
|
||
|
||
HC-SR04 Ultrasonic Distance Sensor.
|
||
|
||
.. figure:: images/ultrasonic-ui.png
|
||
:align: center
|
||
:width: 80.0%
|
||
|
||
.. code-block:: yaml
|
||
|
||
# Example configuration entry
|
||
sensor:
|
||
- platform: ultrasonic
|
||
trigger_pin: D1
|
||
echo_pin: D2
|
||
name: "Ultrasonic Sensor"
|
||
|
||
Configuration variables:
|
||
------------------------
|
||
|
||
- **trigger_pin** (**Required**, :ref:`Pin Schema <config-pin_schema>`): The output pin to
|
||
periodically send the trigger pulse to.
|
||
- **echo_pin** (**Required**, :ref:`Pin Schema <config-pin_schema>`): The input pin on which to
|
||
wait for the echo.
|
||
- **name** (**Required**, string): The name of the sensor.
|
||
- **update_interval** (*Optional*, :ref:`config-time`): The interval to check the
|
||
sensor. Defaults to ``60s``.
|
||
- All other options from :ref:`Sensor <config-sensor>`.
|
||
|
||
Advanced options:
|
||
|
||
- **timeout** (*Optional*, float): The number of meters for the
|
||
timeout. Most sensors can only sense up to 2 meters. Defaults to 2 meters.
|
||
- **pulse_time** (*Optional*, :ref:`config-time`): The duration for which the trigger pin will be
|
||
active. Defaults to ``10us``.
|
||
- **id** (*Optional*, :ref:`config-id`): Manually specify the ID used for code generation.
|
||
|
||
See Also
|
||
--------
|
||
|
||
- :ref:`sensor-filters`
|
||
- :doc:`template`
|
||
- :apiref:`ultrasonic/ultrasonic_sensor.h`
|
||
- :ghedit:`Edit`
|