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clarify VCC, wrt #1452 (#753)

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pille 2020-12-21 00:48:42 +01:00 committed by GitHub
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components/sensor/adc.rst
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@ -72,11 +72,15 @@ To measure voltages higher than 1.1V, set ``attenuation`` to one of the `followi
ESP8266 Measuring VCC
---------------------
On the ESP8266 you can even measure the voltage the chip is getting. This can be useful in situations
On the ESP8266 you can even measure the voltage the *chip is getting*. This can be useful in situations
where you want to shut down the chip if the voltage is low when using a battery.
To measure the VCC voltage, set ``pin:`` to ``VCC`` and make sure nothing is connected to the ``A0`` pin.
.. note::
To avoid confusion: It measures the voltage at the chip, and not at the VCC pin of the board. It should usually be around 3.3V.
.. code-block:: yaml
sensor: