Rust for the Internet of Things

Introduction

The book "Rust for the IoT" (2020, 245 pages) by Joseph Faisal Nusairat is a practical guide to using the Rust language for developing applications in the Internet of Things (IoT) domain. In an era where the number of connected devices numbers in the billions, issues of code security, reliability, and energy efficiency come to the forefront. Rust, thanks to its ownership system and memory safety guarantees without a garbage collector, becomes an ideal candidate for embedded systems. The book is aimed at developers already familiar with Rust and offers a step-by-step path from theory to creating a full-fledged IoT project.

What the book is about

The book is divided into three logical parts. The first part introduces the Rust ecosystem for embedded development: setting up cross-compilation, working with the no_std environment, using microcontroller peripherals (GPIO, I2C, SPI, UART). The second part is dedicated to network protocols: MQTT, CoAP, HTTP/2, and WebSockets — exactly what is needed for device-to-cloud communication. The third part is a complete practical project: creating a smart thermostat with temperature sensors, a relay, and a cloud control panel. The author uses the STM32 platform and the embedded-hal, cortex-m-rt crates.

Who this book is for

The book is intended for intermediate and advanced developers who already have experience programming in Rust (at minimum, an understanding of borrowing and lifetimes). It will also be useful for engineers transitioning from C/C++ to Rust, and for IoT specialists looking to enhance the security of their projects. Beginners in Rust should first master the basics using the official book "The Rust Programming Language."

What the reader will learn

• How to set up a development environment for cross-compilation targeting ARM Cortex-M.
• Principles of working with no_std and a minimal runtime.
• Interacting with hardware peripherals via embedded-hal.
• Implementing MQTT and CoAP protocols in Rust.
• Creating secure OTA firmware updates.
• Integration with cloud platforms (AWS IoT, Azure IoT Hub).
• Testing and debugging embedded applications.
• Optimizing power consumption and code size.

Strengths

The main advantage of the book is its practical focus. Each chapter contains ready-to-use code that can be run immediately on real hardware. The author explains in detail why Rust is safer than C/C++ in the IoT context: no data races, guarantees when working with interrupts, static typing. The chapter on security deserves special mention — TLS 1.3 encryption, protection against buffer overflow attacks. The book is written in a lively style, with examples from the author's real-world practice (he worked on IoT systems at large companies).

Who it is recommended for

The book will be useful for:

• Embedded systems developers looking to transition to Rust.
• IoT architects designing secure devices.
• Engineering students studying modern programming languages.
• Anyone who wants to see Rust in action on "bare metal."

Despite the fact that several years have passed since its release, the book remains relevant, as the fundamental concepts of Rust and embedded-hal have not undergone drastic changes. The only drawback is the lack of coverage for the newest crates (e.g., embassy), but this is compensated for by a deep understanding of the fundamentals.