// ensure that it ends up at physical address 0x0000.0000 or at the start of // the program if located at a start address other than 0.

This example assumes you have already created a feed on adafruitIO and you specify that feed in your settings.toml file. In settings.toml, simply configure your wifi network, password, adafruit-io ...

I am in the process of updating my book "Electronics Explained," published by Newnes/Elsevier. The book is essentially a basic electronics text for those learning about electronics for the first time.