Arduino CLI For I/O Pin Testing. 12 Comments . by: Chris Lott. March 21, 2021. Title: ... and there are some configuration #defines which need to be sorted out in file parsePin.cpp, ...

[Trent M. Wyatt]’s CPUVolt library provides a fast way to measure voltage using no external components, and no I/O pin. It only applies to certain microcontrollers, but he provides example Ar… ...

All Arduino boards have this pin, and it's connected to the built-in voltage regulator that makes sure your board receives a stable supply. For the Nano, the VIN pin is found on Pin 30 (although ...