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s-hadinger merged 1 commit into from
Dec 1, 2025
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Update ADC.md #1525

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2 changes: 2 additions & 0 deletions docs/ADC.md
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Expand Up @@ -15,6 +15,8 @@ After wiring a peripheral to GPIO17 (A0) pin you have to configure it in **Confi
The ESP32 board has eight ADC GPIO pins available (gpio32, gpio33, gpio34, gpio35, gpio36, gpio37, gpio38, gpio39 which are ADC1 channel in ESP32 platform, see [Tasmota ESP32 features](https://tasmota.github.io/docs/ESP32/). Usually only 6 available in ESP32 board: 32, 33, 34, 35, 36 and 39) which can be used for analog inputs. These can be used to read voltage at the ADC pin or to read the module supply voltage (VCC).
All analog input pins support 3.3V.

!!! warning: gpio 34, 35, 36 and 39 are input only pins. These pins do NOT have internal pull-up or pull-down resistors.

After wiring a peripheral to the specified Analog Input GPIO pin, it can be configured in **Configure Module**:

![ADC configuration](_media/ADCesp32.png)
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