Bøger af Koen Vervloesem

Bluetooth Low Energy (BLE) radio chips are ubiquitous from Raspberry Pi to light bulbs. BLE is an elaborate technology with a comprehensive specification, but the basics are quite accessible.A progressive and systematic approach will lead you far in mastering this wireless communication technique, which is essential for working in low power scenarios.In this book, you'll learn how to:Discover BLE devices in the neighborhood by listening to their advertisements.Create your own BLE devices advertising data.Connect to BLE devices such as heart rate monitors and proximity reporters.Create secure connections to BLE devices with encryption and authentication.Understand BLE service and profile specifications and implement them.Reverse engineer a BLE device with a proprietary implementation and control it with your own software.Make your BLE devices use as little power as possible.This book shows you the ropes of BLE programming with Python and the Bleak library on a Raspberry Pi or PC, with C++ and NimBLE-Arduino on Espressif's ESP32 development boards, and with C on one of the development boards supported by the Zephyr real-time operating system, such as Nordic Semiconductor's nRF52 boards.Starting with a very little amount of theory, you'll develop code right from the beginning. After you've completed this book, you'll know enough to create your own BLE applications.

Ever since the Raspberry Pi was introduced, it has been used by enthusiasts to automate their homes. The Raspberry Pi is a powerful computer in a small package, with lots of interfacing options to control various devices. This book shows you how you can automate your home with a Raspberry Pi. You'll learn how to use various wireless protocols for home automation, such as Bluetooth, 433.92 MHz radio waves, Z-Wave, and Zigbee. Soon you'll automate your home with Python, Node-RED, and Home Assistant, and you'll even be able to speak to your home automation system. All this is done securely, with a modular system, completely open-source, without relying on third-party services. You're in control of your home, and no one else.At the end of this book, you can install and configure your Raspberry Pi as a highly flexible home automation gateway for protocols of your choice, and link various services with MQTT to make it your own system. This DIY (do it yourself) approach is a bit more laborious than just installing an off-the-shelf home automation system, but in the process, you can learn a lot, and in the end, you know exactly what's running your house and how to tweak it. This is why you were interested in the Raspberry Pi in the first place, right?Turn your Raspberry Pi into a reliable gateway for various home automation protocols.Make your home automation setup reproducible with Docker Compose.Secure all your network communication with TLS.Create a video surveillance system for your home.Automate your home with Python, Node-RED, Home Assistant and AppDaemon.Securely access your home automation dashboard from remote locations.Use fully offline voice commands in your own language.