Now that you are familiar with the Galileo IDE and know how to create, edit, and upload a program, this chapter will now focus on hardware. You'll learn about the capabilities of the General Purpose Input/Output (GPIO) pins and how you can connect to and access them via software. Specifically, you'll learn about the following:
The GPIO pins, what they can and can't do
How to use and access them using some very basic circuits and very simple programming examples that demonstrate how to make the Galileo access the outside world