Here we are at the end of the chapter where we learnt the fundamental concept of how a physical computing system works with the help of the basic structure of these systems with BeagleBone Black as an example. We also discussed a few application areas in the real world. Then, we saw how to interface a push button switch with a BeagleBone board and write python code to read its status by accessing the GPIO pin as an input from python. At the end, we worked on a very basic project to understand how we can build our own physical computing system that senses and reacts to the physical world using a push button and LED to toggle the LED from On to Off every time you push the button.

In the next chapter, we will see how we can build a much more complex physical computing system with an Analog temperature sensor, unlike a digital input reading from the input from the push button we read. But before you go to the next chapter, I would suggest you write different programs to make the LED do...