A Hands-On Guide to Building Secure, Scalable, and Connected Devices with Zephyr RTOS Are you ready to build the next generation of secure, connected, and resource-constrained devices? Zephyr RTOS is quickly becoming the operating system of choice for IoT, wearables, industrial systems, and safety-critical applications. Backed by the Linux Foundation and supported by major industry leaders, Zephyr combines the power of real-time scheduling with built-in connectivity, security, and scalability. But while Zephyr is powerful, it can also feel complex and overwhelming for newcomers. That is where this book comes in. What You Will Learn Set up the Zephyr development environment and toolchain with confidence. - Master RTOS fundamentals such as threads, scheduling, and synchronization through Zephyr’s kernel. - Work with device tree and Kconfig to customize hardware. - Build drivers and integrate peripherals including GPIO, I²C, SPI, UART, and sensors. - Connect devices with Bluetooth, Wi-Fi, LoRa, MQTT, and CoAP. - Implement secure boot, encryption, and secure storage. - Deliver over-the-air (OTA) firmware updates for scalable deployments. - Apply everything in real-world projects such as wearables, IoT sensors, and industrial systems. Who This Book Is For Embedded developers moving from FreeRTOS or bare-metal programming. - IoT engineers who need a production-grade RTOS with built-in security. - Professionals and students looking to master Zephyr RTOS for real-world projects. Whether you are prototyping your first IoT device or deploying at scale, this hands-on guide gives you the clarity, depth, and confidence to master Zephyr RTOS. Start building secure, scalable, and connected devices today.