In this chapter, we walked through the GPIO pins on the Raspberry Pi. We discussed what each of these pin types does and also learned how to enable and interact with them.
A variety of devices that can be connected to the Raspberry Pi were discussed, including prototyping shields and the Cooking Hacks Arduino to Raspberry Pi bridge shield.
We also looked at how this interaction can be facilitated through either a C or Python program. This included downloading the wiringPi library.
These basic skills should leave you in a position to start new interesting projects that allow you to interact with other pieces of electronic hardware.
Next, we will look at exploring sound on the Raspberry Pi 2 through programming.