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Add section for ADC pins on esp32 (#3072)

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Jesse Hills 2023-07-17 09:12:25 +12:00
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commit d22b54e634
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components/sensor/adc.rst
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@ -74,6 +74,33 @@ To simplify this, we provide the setting ``attenuation: auto`` for an automatic/
Even though the measurements are calibrated, the range *limits* are variable among chips due to differences in the internal voltage reference.
.. _adc-esp32_pins:
ESP32 pins
----------
``ADC2`` pins are only usable when Wi-Fi is not configured on the device.
.. list-table::
:header-rows: 1
* - Variant
- ADC1
- ADC2
* - ESP32
- GPIO32 - GPIO39
- GPIO0, GPIO2, GPIO4, GPIO12 - GPIO15, GPIO25 - GPIO27
* - ESP32-C3
- GPIO0 - GPIO4
- GPIO5
* - ESP32-S2
- GPIO1 - GPIO10
- GPIO11 - GPIO20
* - ESP32-S3
- GPIO1 - GPIO10
- GPIO11 - GPIO20
.. _adc-raw:
Different ESP32-ADC behavior since 2021.11