Getting acquainted with the GPIO

Before we embark on connecting lots of things to our Pi board, it might be a good idea to just get acquainted with the GPIO through a couple of simple projects that will help us understand how to interact with the digital I/O pins using shell scripts.

Let there be light

This simple little project shows how to connect a GPIO output to an LED, and switch it on and off using shell commands.

The following diagram shows how to connect up the circuit using a breadboard:

Let there be light


The pretty diagram that you just saw was produced using a free software tool from fritzing, which is an open-source hardware initiative to make electronics ...

Get Building a Home Security System with Raspberry Pi now with the O’Reilly learning platform.

O’Reilly members experience live online training, plus books, videos, and digital content from nearly 200 publishers.