Easy measure of any AC voltage with Arduino and ZMPT101B (up to 250V)

This is the easy and the precise way to measure AC voltage of any shape, not like the other one that rectifies the signal or use a peak to peak measure to calculate the RMS, here we're using a simple library and a simple module to calculate the True RMS of any voltage, sine, triangular and square ...
No sketchy wiring no false code, be careful don't mess with the powerline.
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Wiring and codes:
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