Engineering Bluetooth Low EnergyA Systems Approach to Architecture, Communication, Security, Performance, and ProductionBluetooth Low Energy is easy to demonstrate-and much harder to engineer well.A device can advertise, connect, exchange data, and appear to work perfectly on a development bench while still failing under real-world RF conditions, mobile operating systems, power constraints, interoperability requirements, security requirements, or production workloads.Engineering Bluetooth Low Energy takes a systems-level approach to BLE, showing how the radio, protocol stack, data model, embedded firmware, mobile applications, security mechanisms, performance characteristics, and production requirements fit together.Rather than treating BLE as a collection of APIs and terminology, this book develops an engineering mental model that helps you understand why a BLE system behaves the way it does, where failures originate, and how to design around real-world constraints.You will learn how to: Understand the BLE architecture from the PHY and Link Layer through L2CAP, ATT, GATT, GAP, SMP, HCI, and the host/controller boundaryReason about advertising, scanning, connections, packets, timing, PHYs, MTU, data length, throughput, and latencyDesign GATT databases, services, characteristics, descriptors, and application-level data modelsBuild BLE architectures for embedded devices and integrate them with mobile applicationsUnderstand notifications, indications, reads, writes, discovery, and other common BLE operationsMeasure and reason about power consumption, throughput, latency, range, interference, and reliabilityDesign BLE systems with security, authentication, encryption, pairing, bonding, and application authorization in mindDiagnose interoperability problems across devices, operating systems, controllers, firmware, and applicationsTroubleshoot BLE failures using packet captures, HCI evidence, ATT errors, state transitions, measurements, and controlled experimentsEvaluate advanced BLE capabilities and determine when they are appropriate for a productDesign BLE systems for firmware evolution, changing requirements, manufacturing, testing, deployment, and long-term compatibilityThe book also addresses an important reality of wireless engineering: a successful connection is not the same thing as a successful product.RF conditions change. Phones disappear. Applications are suspended. Connections fail. Devices reboot. Firmware evolves. GATT databases change. Power budgets become restrictive. Different platforms expose different capabilities. A production BLE system must be designed to handle these conditions rather than assuming that the ideal development scenario will persist.Whether you are developing a sensor, wearable, IoT device, industrial product, robotics system, embedded platform, mobile-connected device, or other Bluetooth-enabled product, this book provides a structured way to reason about the engineering decisions behind it.Engineering Bluetooth Low Energy is for engineers who want to move beyond simply making BLE work-and learn how to design, measure, troubleshoot, and evolve BLE systems that remain understandable and reliable outside the laboratory.
