Through this chapter, you've just created a real functional IoT application using a Raspberry Pi and Python. We saw two alternative ways to flash a LED and read a button press in Python using both the GPIOZero and PiGPIO GPIO libraries. We also compared the use of these libraries and saw that GPIOZero takes a higher-level and more abstract approach to coding and GPIO control than does the lower-level PiGPIO library. We also connected the LED to the internet using the online dweet.io service. Using simple URLs, we were able to turn on and off and blink the LED by simply visiting the URLs in a web browser.
As you proceed through the subsequent chapters in this book, we'll be building on and going deeper into the core knowledge you have learned in this chapter about GPIO interfacing, electronic circuits, and controlling a circuit over the internet. We will learn alternative approaches to building an application to those we have covered in this chapter...