In this chapter, we looked at the steps needed to design and deploy a Python-based web application on the Pi using the Flask framework. This is a technique we will be using in a couple of chapters later in the book, where we will create web-based control panels and information displays.

We also looked at yet more ways to interface devices to the Pi, both directly via the GPIO port and by using an intermediate device; in our case, an Arduino. We also looked at the advantages this can bring with certain types of sensor.

In the next chapter, we will further explore the use of sensors, as we create a home security system that connects several sensors using a wireless network.