This book is divided in to seven chapters. We start off with the introduction to IoT for beginners, thereby covering the characteristics and enabling technologies of IoT. We then move on to detail the sensors and other related hardware units which form the core part of any IoT application in br>Chapter 2. Multiple protocols are followed in IoT domain and they are detailed in chapters 3 and 4. Cloud is another major component as they help to control things from remote places, process and feedback data, etc. Br>chapter 5 is an in-depth discussion on cloud technology from IoT perspective. Data analytics is another associated field of IoT discussed in br>Chapter 6, which looks into different machine learning algorithms and real-time data analytics.