We created a DIY version of a smart power switch, based on Arduino, and controlled by an Android application via Wi-Fi. We connected all the required components to the Arduino board, wrote an Arduino sketch to accept commands via Wi-Fi, and finally, created an Android application to control the switch remotely.

In the next chapter, we will use another Arduino board, called the Arduino Yún, where we will be able to plug an USB camera. As this board will have Wi-Fi as well, we will use the project to create a remote Wi-Fi security camera.