This book addresses the fundamental technologies, architectures, application domains, and future research directions of the Internet of Things (IoT). It also discusses how to create your own IoT system according to applications requirements, and it presents a broader view of recent trends in the IoT domain and open research issues. This book encompasses various research areas such as wireless networking, advanced signal processing, IoT, and ubiquitous computing. Internet of Things: Theory to Practice discusses the basics and fundamentals of IoT and real-time applications, as well as the associated challenges and open research issues. The book includes several case studies about the use of IoT in day-to-day life. The authors review various advanced computing technologies—such as cloud computing, fog computing, edge computing, and Big Data analytics—that will play crucial roles in future IoT-based services. The book provides a detailed role of blockchain technology, Narrowband IoT (NB-IoT), wireless body area network (WBAN), LoRa (a longrange low power platform), and Industrial IoT (IIoT) in the 5G world. This book is intended for universitycollege students, as well as amateur electronic hobbyists and industry professionals who are looking to stay current in the IoT domain. Python is a high-level, interpreted programming language known for its simplicity, readability, and versatility. Python has been a widely used programming language in various domains, including web development, data analysis, scientific computing, AI, and of course, IoT. Python offers several advantages compared to other programming languages in the IoT domain, making it a popular choice among developers.