ADC only possible with Pins 32 - 39?

[mnvk52]

Hi,
the manual says

On the ESP32, ADC functionality is available on Pins 32, 33, 34, 35, 36, 37, 38, and 39.

https://micropython-docs-esp32.readthed ... conversion

My device has more pins available for ADC: https://joy-it.net/files/files/Produkte ... 200320.pdf

How can I read pin 4? This way doesn't work:

Code: Select all

from machine import Pin, ADC
print(ADC(Pin(4)).read())

Code: Select all

%Run pin4read.py
Traceback (most recent call last):
  File "/home/pin4read.py", line 2, in <module>
ValueError: invalid Pin for ADC

[rpr]

Those other pins are connected to ADC2 which is not currently supported. Part of the reason might be that ADC2 cannot be used when WiFi is active. In principle, it might be possible for someone to write/modify the micropython ADC driver to support the ADC2.

https://docs.espressif.com/projects/esp ... s/adc.html

[rcolistete]

See "MicroPython_ESP32_psRAM_LoBo" firmware, which supports ADC2.