Advancements in sensor technology, smart instrumentation, wireless sensor networks, miniaturization, RFID, and information processing are contributing to the realization of the Internet of Things (IoT). IoTs are finding applications in various areas, including environmental monitoring, intelligent buildings, smart grids, and more. This book addresses the design challenges of IoT, theory, various protocols, implementation issues, and includes a few case studies. It will be very useful for postgraduate students and researchers to understand the basics and implementation of IoT.