Tech Note 143 - ESP32 – Voltage Reading (pre-calculated voltage divider) Examples
How to measure voltages using the ESP32 ADC. Here I have pre-calculated a range of voltage dividers to measure voltages from 0 - 5v, 0 - 6v, 0 - 12v, 0 - 15v, 0 - 24v, 0 - 50v and 0 - 100v. Because the input impedance of the ESP32 loads the voltage divider, you have to compensate the readings accordingly and I explain how to do that, including pre-calculated factors so you don't have to work anything out! Example code here: https://github.com/G6EJD/ESP32-ADC-Vo...
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