The time has come to end this book, but before it's all over, we will end with one final project that ties up all the knowledge and information in previous chapters. This chapter is a continuation of Chapter 8, On the Wi-fly, where we introduced the Particle Core board and how to interact with different online services. The same board will act as the hardware base in this chapter where we will create our own smart watch. But this project is based on my idea of the future, where all areas of even the smallest town will be covered by Wi-Fi and where smart watches, among other things, will connect straight to the Internet in a seamless manner. We might not be there yet but don't worry, the smart watch in this chapter will still work in the present. Let's not forget the best part about this project. Every time some one asks–what's that on your arm? You can reply, it's a smart watch I built myself.

I have always had a problem with smart watches. First of all, I don...