In this chapter, we learned how to build and integrate a modular security system based on Raspberry Pi Zero and Arduino boards. There are of course many ways to improve this project. For example, you can simply add more modules to the project, such as more motion sensors that trigger the same alarm. You can monitor the system, even if you are outside of the Wi-Fi network of your home.
In the next chapter, we are going to learn how to control your system from an Android application, and how to integrate a real system from your smartphone that's fantastic!