esphome-docs/esphomeyaml/components/esp32_touch.rst
2018-11-14 22:12:27 +01:00

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ESP32 Touch Pad Hub
===================
.. seo::
:description: Instructions for setting up the touch pad feature on the ESP32.
:image: touch.svg
The ``esp32_touch`` component creates a global hub for detecting touches on
the eight touch pads of the ESP32 as :doc:`binary senors </esphomeyaml/components/binary_sensor/esp32_touch>`.
.. code:: yaml
# Example configuration entry
esp32_touch:
setup_mode: False
binary_sensor:
- platform: esp32_touch
name: "ESP32 Touch Pad GPIO27"
pin: GPIO27
threshold: 1000
Configuration variables:
------------------------
- **setup_mode** (*Optional*, boolean): Whether debug messages with the touch pad value should
be displayed in the logs. Useful for finding out suitable thresholds for the binary sensors, but
spam the logs. See :doc:`setting up touch pads </esphomeyaml/components/binary_sensor/esp32_touch>`
for more information. Defaults to false.
- **id** (*Optional*, :ref:`config-id`): Manually specify the ID for code generation.
Advanced options (the defaults are usually quite good, but if you're having accuracy issues, use these):
- **iir_filter** (*Optional*, :ref:`config-time`): Optionally set up an
`Infinite Impulse Response <https://en.wikipedia.org/wiki/Infinite_impulse_response>`__
filter should be applied to all touch pads. This can increase the accuracy of the touch pads a lot, but
higher values decrease the response time. A good value to start with is ``10ms``. Default is no IIR filter.
- **sleep_duration** (*Optional*, :ref:`config-time`): Set a time period
denoting the amount of time the touch peripheral should sleep between measurements. This can decrease
power usage but make the sensor slower. Default is about 27 milliseconds.
- **measurement_duration** (*Optional*, :ref:`config-time`): Set the conversion
time for all touch pads. A longer conversion time means that more charge/discharge cycles of the touch pad
can be performed, therefore increasing accuracy. Default is about 8ms, the maximum amount.
- **low_voltage_reference** (*Optional*): The low voltage reference to use for the charge cycles. See
the `esp-idf docs <https://esp-idf.readthedocs.io/en/latest/api-reference/peripherals/touch_pad.html#optimization-of-measurements>`__
for a nice explanation of this. One of ``0.5V``, ``0.6V``, ``0.7V``, ``0.8V``. Default is ``0.5V``.
- **high_voltage_reference** (*Optional*): The high voltage reference to use for the charge cycles. See
the `esp-idf docs <https://esp-idf.readthedocs.io/en/latest/api-reference/peripherals/touch_pad.html#optimization-of-measurements>`__
for a nice explanation of this. One of ``2.4V``, ``2.5V``, ``2.6V``, ``2.7V``. Default is ``2.7V``.
- **voltage_attenuation** (*Optional*): The voltage attenuation to use for the charge cycles. See
the `esp-idf docs <https://esp-idf.readthedocs.io/en/latest/api-reference/peripherals/touch_pad.html#optimization-of-measurements>`__
for a nice explanation of this. One of ``1.5V``, ``1V``, ``0.5V``, ``0V``. Default is ``0V``.
See Also
--------
- :doc:`binary_sensor/esp32_touch`
- :doc:`API Reference </api/binary_sensor/esp32_touch>`
- `Edit this page on GitHub <https://github.com/OttoWinter/esphomedocs/blob/current/esphomeyaml/components/esp32_touch.rst>`__
.. disqus::