mirror of
https://github.com/esphome/esphome-docs.git
synced 2024-12-28 17:48:35 +01:00
81 lines
2.7 KiB
ReStructuredText
81 lines
2.7 KiB
ReStructuredText
Pulse Counter Sensor
|
||
====================
|
||
|
||
.. seo::
|
||
:description: Instructions for setting up pulse counter sensors.
|
||
:image: pulse.png
|
||
|
||
The pulse counter sensor allows you to count the number of pulses and the frequency of a signal
|
||
on any pin.
|
||
|
||
On the ESP32, this sensor is even highly accurate because it's using the hardware `pulse counter
|
||
peripheral <https://docs.espressif.com/projects/esp-idf/en/latest/api-reference/peripherals/pcnt.html>`__
|
||
on the ESP32.
|
||
|
||
.. figure:: images/pulse-counter.png
|
||
:align: center
|
||
:width: 80.0%
|
||
|
||
.. code-block:: yaml
|
||
|
||
# Example configuration entry
|
||
sensor:
|
||
- platform: pulse_counter
|
||
pin: 12
|
||
name: "Pulse Counter"
|
||
|
||
Configuration variables:
|
||
------------------------
|
||
|
||
- **pin** (**Required**, :ref:`config-pin`): The pin to count pulses on.
|
||
- **name** (**Required**, string): The name of the sensor.
|
||
- **count_mode** (*Optional*): Configure how the counter should behave
|
||
on a detected rising edge/falling edge.
|
||
|
||
- **rising_edge** (*Optional*): What to do when a rising edge is
|
||
detected. One of ``DISABLE``, ``INCREMENT`` and ``DECREMENT``.
|
||
Defaults to ``INCREMENT``.
|
||
- **falling_edge** (*Optional*): What to do when a falling edge is
|
||
detected. One of ``DISABLE``, ``INCREMENT`` and ``DECREMENT``.
|
||
Defaults to ``DISABLE``.
|
||
|
||
- **internal_filter** (*Optional*, :ref:`config-time`): If a pulse shorter than this
|
||
time is detected, it’s discarded and no pulse is counted. Defaults to ``13us``. On the ESP32,
|
||
this value can not be higher than ``13us``, for the ESP8266 you can use larger intervals too.
|
||
If you enable this, set up the ``count_mode`` to increase on the falling edge, not leading edge.
|
||
|
||
- **update_interval** (*Optional*, :ref:`config-time`): The interval to check the sensor. Defaults to ``60s``.
|
||
|
||
- **id** (*Optional*, :ref:`config-id`): Manually specify the ID used for code generation.
|
||
- All other options from :ref:`Sensor <config-sensor>`.
|
||
|
||
Converting units
|
||
----------------
|
||
|
||
The sensor defaults to measuring its values using a unit of measurement
|
||
of “pulses/min”. You can change this by using :ref:`sensor-filters`.
|
||
For example, if you’re using the pulse counter with a photodiode to
|
||
count the light pulses on a power meter, you can do the following:
|
||
|
||
.. code-block:: yaml
|
||
|
||
# Example configuration entry
|
||
sensor:
|
||
- platform: pulse_counter
|
||
pin: 12
|
||
unit_of_measurement: 'kW'
|
||
name: 'Power Meter House'
|
||
filters:
|
||
- multiply: 0.06
|
||
|
||
See Also
|
||
--------
|
||
|
||
- :ref:`sensor-filters`
|
||
- :doc:`rotary_encoder`
|
||
- `esp-idf Pulse Counter API <https://docs.espressif.com/projects/esp-idf/en/latest/api-reference/peripherals/pcnt.html>`__.
|
||
- :apiref:`sensor/pulse_counter.h`
|
||
- :ghedit:`Edit`
|
||
|
||
.. disqus::
|