Hardware Reference
In-Depth Information
Chapter 4. Accessing the GPIO Pins
Now that you are familiar with the Arduino IDE and how to create, edit, and upload a pro-
gram, this chapter will now turn your focus to the HW. You'll get a chance to learn how to
connect to and access the capabilities of the
general purpose input/output
(
GPIO
) pins
from the SW. In this chapter, I'll start by explaining the GPIO pins, what they can and can't
do, and then show you how to make Arduino access the outside world with the help of
some very basic circuits and very simple programming examples.
