What you need for this book
You will need any computer or device capable of running Python 3.x or greater, Chrome 56.x or greater, JDK 8 or greater, and Node.js 6.7.x or greater.
In order to work with Mosquitto 1.4.11 or greater, you will need a computer with any of the operating systems supported by this version of Mosquitto. The list is available at https://mosquitto.org/download/.
In order to work with Xcode 8.x, you will need a Mac computer capable of running OS X 10.11.5 or later, with 8 GB RAM.