Book Image

Creative DIY Microcontroller Projects with TinyGo and WebAssembly

By : Tobias Theel
Book Image

Creative DIY Microcontroller Projects with TinyGo and WebAssembly

By: Tobias Theel

Overview of this book

While often considered a fast and compact programming language, Go usually creates large executables that are difficult to run on low-memory or low-powered devices such as microcontrollers or IoT. TinyGo is a new compiler that allows developers to compile their programs for such low-powered devices. As TinyGo supports all the standard features of the Go programming language, you won't have to tweak the code to fit on the microcontroller. This book is a hands-on guide packed full of interesting DIY projects that will show you how to build embedded applications. You will learn how to program sensors and work with microcontrollers such as Arduino UNO and Arduino Nano IoT 33. The chapters that follow will show you how to develop multiple real-world embedded projects using a variety of popular devices such as LEDs, 7-segment displays, and timers. Next, you will progress to build interactive prototypes such as a traffic lights system, touchless hand wash timer, and more. As you advance, you'll create an IoT prototype of a weather alert system and display those alerts on the TinyGo WASM dashboard. Finally, you will build a home automation project that displays stats on the TinyGo WASM dashboard. By the end of this microcontroller book, you will be equipped with the skills you need to build real-world embedded projects using the power of TinyGo.
Table of Contents (13 chapters)


In this chapter, we have learned how to use the Wi-Fi chip that is built onboard the Arduino Nano 33 IoT board. We then wrote reusable packages to use the Wi-Fi chip and the MQTT client, we discovered what MQTT is, and we learned how to publish messages to a topic. We have learned how to read sensor data from a BME280 sensor and publish this to an MQTT broker that we have set up locally.

Then, we have learned what Wasm is and implemented our first application using Wasm. We have also learned how to use a JavaScript MQTT client in order to subscribe to an MQTT topic and react to messages. While doing so, we learned how to manipulate the Document Object Model (DOM) in order to dynamically update the view.

In the next chapter, we are going to learn how to try out a Wasm app by using a login view, and will also learn how to implement bidirectional communication over MQTT.