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73 lines
2.8 KiB
ReStructuredText
73 lines
2.8 KiB
ReStructuredText
Rotary Encoder Sensor
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=====================
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.. seo::
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:description: Instructions for setting up rotary encoders.
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:image: rotary_encoder.jpg
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The ``rotary_encoder`` sensor platform allows you to use any continuous-rotation
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rotary encoders with ESPHome. These devices usually have two pins with which
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they encode the rotation. Every time the knob of the rotary encoder is turned, the
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signals of the two pins go HIGH and LOW in turn. See
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`this Arduino article <https://playground.arduino.cc/Main/RotaryEncoders>`__ to gain
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a better understanding of these sensors.
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.. figure:: images/rotary_encoder.jpg
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:align: center
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:width: 75.0%
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Example of a continuous rotary encoder. Pin ``+`` is connected to ``3.3V``,
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``GND`` is connected to ``GND``, and ``CLK`` & ``DT`` are A & B.
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.. figure:: /components/sensor/images/rotary_encoder-ui.png
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:align: center
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:width: 75.0%
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To use rotary encoders in ESPHome, first identify the two pins encoding th step value.
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These are often called ``CLK`` and ``DT`` as in above image. Note if the values this sensor
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outputs go in the wrong direction, you can just swap these two pins.
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.. code-block:: yaml
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# Example configuration entry
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sensor:
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- platform: rotary_encoder
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name: "Rotary Encoder"
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pin_a: D1
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pin_b: D2
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Configuration variables:
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------------------------
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- **pin_a** (**Required**, :ref:`Pin Schema <config-pin_schema>`):
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The first pin for determining the step value. Must not be a pin from an external I/O expander.
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- **pin_b** (**Required**, :ref:`Pin Schema <config-pin_schema>`):
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The second pin for determining the step value. Must not be a pin from an external I/O expander.
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- **name** (**Required**, string): The name of the rotary encoder sensor.
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- **pin_reset** (*Optional*, :ref:`Pin Schema <config-pin_schema>`):
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An optional pin that resets the step value. This is useful with rotary encoders that have have a
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third pin. Defaults to no reset pin.
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- **resolution** (*Optional*, string): The resolution of the sensor, this controls how many
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pulses are generated by one step:
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- 1 (default)
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- 2
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- 4
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- **id** (*Optional*, :ref:`config-id`): Manually specify the ID used for code generation.
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- **min_value** (*Optional*, int): The minimum value this rotary encoder will go to, turning
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the knob further will not decrease the number. Defaults to no minimum.
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- **max_value** (*Optional*, int): The maximum value this rotary encoder will go to, turning
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the knob further will not increase the number. Defaults to no maximum.
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- All other options from :ref:`Sensor <config-sensor>`.
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See Also
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--------
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- :ref:`sensor-filters`
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- :doc:`pulse_counter`
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- :doc:`template`
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- `Mechanical Input Library <https://github.com/jkDesignDE/MechInputs>`__ by `Jochen Krapf <https://github.com/JK-de>`__
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- :apiref:`sensor/rotary_encoder.h`
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- :ghedit:`Edit`
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