Switch Analog Voltage on esp32 to use analogReadMilliVolts #620
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Having issues with the C6 (set aVref to 1.1v and got 0.48v from 3v3 signal).
Just wanted to look into attenuation and the aVref, but saw that analogReadMilliVolts returned the calibrated millivolts, rather than the raw adc value which is uncalibrated.
This PR now switches both periodic and on_change to use the same functions, along with using analogReadMilliVolts for ESP32 based boards.