Moved loop() to bottom of Advanced example

[Bascy]

Fix method not known compiler errors

[PaulZC]

Hi @Bascy ,
Thanks for submitting this - but I won't be merging it. I don't want users to have to go looking for the loop below all the helper functions.
The code compiles fine for me using ESP32. I'm guessing this is a peculiarity of the compiler you are using? Maybe try disabling "warnings as errors"?
Best wishes,
Paul