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)

Building the home automation client

Home automation basically consists of activating and deactivating things based on a precondition. For example, we might want to turn on a light when someone enters a room at night. Throughout this book, we have activated and deactivated many things based on preconditions, but most of them were not connected to a network. We are now going to learn how we can send signals over a network. These signals are going to be used as preconditions. After completing this section, we will be fully prepared for building our own home automation clients that can be triggered over a network.

The client that is going to run on the Arduino Nano 33 IoT is simply going to connect to an MQTT broker and then subscribe to a topic. When a message comes in for the topic, we need to deserialize the message and perform the action that is defined in the message.

For our example project, we are going to turn an LED on and off. Of course, a single LED might not be enough...