There is a method is WebServer.h that I cannot find any documentation on.

Line 86:
void on(const String &uri, HTTPMethod method, THandlerFunction fn, THandlerFunction ufn);

This method is used in me-no-dev's "Webupdate" example which I'm trying to adapt to my project: (https://github.com ...

I created an easy library for the ESP32 arduino toolchain to read the ADC, average up to 1,000,000 samples, linearize it (because the integral non-linearity is horrible), all with non-blocking code. The pieces to make a fully functional non-blocking analogRead were already a part of the ESP32 ...