In this chapter, you will be introduced to the basic building blocks of an IoT project. You will briefly get to know various protocols, architectures, and development boards for IoT prototyping. The main purpose of this chapter is to show you what's out there, so you can decide which technologies might be of interest for your next project and give you a head start on further exploration. If you feel overwhelmed by the number of new technologies and options available, don't be. You don't need to understand everything here, but hopefully you will come back later to look up one or more topics if you stumble upon them elsewhere. This chapter neither tries to be a complete reference, nor can it be. It would go completely beyond the scope of this book—which is to teach you how to build IoT prototypes with Arduino and MQTT...





















































