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)

Blocking a goroutine

Blocking a goroutine can be important. The easiest example of this is the main function. If we have no blocking call or loop inside the main function, the program terminates and restarts. In most cases, we do not want a program to terminate, as we might want to wait for a signal on any input that could trigger any further action in the code.

Let's now look at some possibilities for blocking a goroutine. Blocking a goroutine is sometimes necessary in order to gain time to let a scheduler work on other goroutines.

Reading from a channel

A very common way to block a goroutine is to read from a channel. Reading from a channel blocks the goroutine until a value can be read. This is illustrated in the following code example:

func main() {
      blocker := make(chan bool, 1)
     println("this gets never printed")

A select statement

A select...