mirror of
https://github.com/esphome/esphome-docs.git
synced 2024-12-25 17:17:54 +01:00
67 lines
2.3 KiB
ReStructuredText
67 lines
2.3 KiB
ReStructuredText
Passive Infrared Sensor
|
|
=======================
|
|
|
|
.. seo::
|
|
:description: Instructions for setting up PIR (passive infrared) motion detection sensors in ESPHome
|
|
:image: pir.jpg
|
|
:keywords: PIR
|
|
|
|
.. figure:: images/pir-header.jpg
|
|
:align: center
|
|
:width: 75.0%
|
|
|
|
Passive Infrared Sensors (or PIR sensors for short) are completely supported by
|
|
ESPHome. These sensors measure the infrared light emitted from objects in its
|
|
field of view, and if it detects a sudden change between different parts of the
|
|
sensing area, the signal is pulled high.
|
|
|
|
.. figure:: images/pir-inside.jpg
|
|
:align: center
|
|
:width: 60.0%
|
|
|
|
Connecting the PIR sensor is also quite simple. You need to connect ``GND`` to a GND pin
|
|
on your board and ``VCC`` to a ``5V`` or ``12V`` pin. Technically you can also connect
|
|
``VCC`` to ``3.3V``, but the sensor measurements won't be as stable.
|
|
|
|
Next you need to connect the signal pin (``OUT``). Fortunately, the sensor signal has
|
|
a voltage of ``3.3V`` max, so we can directly connect it to a free GPIO pin on the ESP board.
|
|
Otherwise, we would need to step down the voltage in order to not damage the ESP.
|
|
|
|
.. figure:: images/pir-pins.jpg
|
|
:align: center
|
|
:width: 75.0%
|
|
|
|
.. warning::
|
|
|
|
Some PIR sensors have the GND and power supply pins swapped, please open the front
|
|
cover to see which pin mapping your PIR sensor is using to make sure.
|
|
|
|
On the back side you will additionally find two knobs that you can turn to change the sensor
|
|
sensitivity and time the signal will stay active for once motion has been detected. Turning
|
|
these clockwise will increase sensitivity/re-trigger time.
|
|
|
|
To configure ESPHome for use with the PIR sensor, use a
|
|
:doc:`GPIO Binary Sensor </components/binary_sensor/gpio>`. It can detect
|
|
if a pin is pulled HIGH/LOW and reports those values to Home Assistant. Optionally also
|
|
set a ``device_class`` so that Home Assistant uses a nice icon for the binary sensor.
|
|
|
|
.. code-block:: yaml
|
|
|
|
binary_sensor:
|
|
- platform: gpio
|
|
pin: <PIN_PIR_SENSOR_IS_CONNECTED_TO>
|
|
name: "PIR Sensor"
|
|
device_class: motion
|
|
|
|
.. figure:: images/pir-ui.png
|
|
:align: center
|
|
:width: 60.0%
|
|
|
|
See Also
|
|
--------
|
|
|
|
- `Awesome article explaining how PIR Sensors work <https://learn.adafruit.com/pir-passive-infrared-proximity-motion-sensor/how-pirs-work>`__.
|
|
- :doc:`/components/binary_sensor/gpio`
|
|
- :doc:`bruh`
|
|
- :ghedit:`Edit`
|