Until now we have learned about the MQTT protocol and how to subscribe and publish data, both using the application and Edison. Now we will be dealing with a real use case where we'll control an electrical load using Intel Edison, which again will be controlled by the Internet. Here is a quick introduction about what we will be dealing with:

• Hardware components and circuits
• Developing a WPF application to control Intel Edison
• Using MQTT to stitch everything together

Since we've already seen how to control Edison using an Android application, this section won't concentrate on that; instead, it will mainly deal with the WPF application. This is just to give you a brief idea about how a PC can control IoT devices, not only in home automation, but also in various other use cases, both in simple proof of concept scenarios to industry standard solutions.