How to Read SAR ADC Values on AML-S905X-CC

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1

There are 2 SAR ADC inputs reading up to 1.8V on the 2J8 header behind the HDMI port.
The SAR ADC values can be found in the following files:

cat /sys/bus/iio/devices/iio:device0/in_voltage0_raw
cat /sys/bus/iio/devices/iio:device0/in_voltage2_raw

They can be used for keypads, temperature sensing, and more but make sure to not exceed 1.8V.

2

man, Libre Computer is so cool. i love how you guys are building up the documentation. it is very impressive!

3

We are just documenting standard Linux interfaces. These methods have existed for years but the popular fruit Pi libraries promote other non-standard interfaces.