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 a CLI

In this section, we are going to parse the input from a user and compare the input with predefined commands. These commands will then be executed by the microcontroller. For this project, we are going to use the same hardware setup that we used in the previous one.

We will start by creating a new folder named hd44780-cli inside the Chapter06 folder. Then, we must create a main.go file with an empty main function inside it. The project's structure should now look similar to the following:

Figure 6.10 – Project structure

Now that the project structure has been set up, we can implement the logic. To do so, follow these steps:

  1. Above the main function, start by defining some constants. commandConstant represents the command that needs to be sent to the microcontroller. We will use these constants ahead in this code and compare them with the user input to determine whether a CLI command has been entered:
    const (