In this chapter, you learned how to control a device such as a relay remotely, from anywhere in the world.

Here is a summary of what we did:

First, we attached a relay to our board just as we did in Chapter 3, Controlling Outputs Using the Galileo Board. Then, we built an interface to control the relay via simple buttons. Finally, we integrated the interface through Ngrok, which enabled us to access the controls from any place where there is an internet connection. We also looked at another way to access the interface, which is to modify the router settings and forward the incoming connections to the router.

In the next chapter, we are going to build a wireless security camera just using a USB webcam. Stay tuned!