This updated and expanded second edition of the Artech House bestseller, Inside Bluetooth Low Energy, presents the recent developments within the Bluetooth Core Specifications 4.1 and 4.2. This new edition explores both Internet of Things (IoT) and Bluetooth Low Energy (LE) in one single flow and demonstrates how this technology is very well suited for IoT implementations. The book covers all the advances within the new specifications including Bluetooth LE enhanced power efficiency, faster connections, and enhanced privacy and security.Developed for ultra-low power devices, such as heart rate monitors, thermometers, and sensors, Bluetooth LE is one of the latest, most exciting enhancements to Bluetooth technology. This cutting-edge book presents an easy-to-understand, broad-based explanation of Bluetooth LE, its building blocks and how they all come together. Packed with examples and practical scenarios, the book helps readers rapidly gain a clear, solid understanding of Bluetooth LE in order to work more effectively with its specification. This book explores the architecture of the Bluetooth LE stack and functionality of its layers and includes a broad view of the technology, identifies the various building blocks, and explains how they come together. Readers will also find discussions on Bluetooth basics, providing the background information needed to master Bluetooth LE. I highly recommend this book to people entering the Bluetooth engineering profession. The book couples a strong theoretical base with a great deal of practical design information that the highly qualified author imparts. --David Bean, Teledyne Lecroy Naresh is a world renowned expert in Bluetooth technology. He has an exceptional flair for explaining concepts in a lucid manner. This book is all set to give the readers a great insight into the working principles and the nuts-n-bolts that build up the Bluetooth Technology - A must read for technology lovers. --Balvinder Singh, Sr. Staff Engineering Manager at Qualcomm Naresh Gupta has written an engineers masterpiece devolving the inner workings of Bluetooth low energy, describing their uses and the history of this technology, and foretells how this technology will be modified in the future. --Larry Marks, InfoSecurity Professional magazine Naresh Gupta has nearly two decades of industry experience, including working as a design manager for close to 9 yearson the Connectivity Business Unit with STMicroelectronics and ST Ericsson. He is currently in a senior managementposition with another multi-national technology company. He holds a B.S. in computer engineering from the DelhiCollege of Engineering, India and an M.B. A. in operations management.