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Esp32 pulsecounter optional pcnt (#2212)

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Co-authored-by: Jesse Hills <3060199+jesserockz@users.noreply.github.com>
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components/sensor/pulse_counter.rst
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@ -38,10 +38,13 @@ Configuration variables:
- **falling_edge** (*Optional*): What to do when a falling edge is
detected. One of ``DISABLE``, ``INCREMENT`` and ``DECREMENT``.
Defaults to ``DISABLE``.
- **use_pcnt** (*Optional*, boolean): Use hardware ``PCNT`` pulse counter. Only supported on ESP32. Defaults to ``true``.
- **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.
time is detected, it’s discarded and no pulse is counted. Defaults to ``13us``. On the ESP32, when using the hardware pulse counter
this value can not be higher than ``13us``, for the ESP8266 or with ``use_pcnt: false`` you can use larger intervals too.
If you enable this, set up the ``count_mode`` to increase on the falling edge, not leading edge. For S0 pulse meters that are used to meter power consumption 50-100 ms is a reasonable value.
- **update_interval** (*Optional*, :ref:`config-time`): The interval to check the sensor. Defaults to ``60s``.