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)
10
Afterword

Building a weather station

We start our journey through the world of Internet of Things (IoT) and Wasm by building a weather station. In our first project of this chapter, we are going to build a program that displays weather data on an ST7735 display. We are going to build some reusable components that we are going to utilize in the final project of the chapter. We are going to learn how to use a BME280 sensor that is able to sense air pressure, temperature, and humidity—the elements required for noting a change in the weather. But first, we need to assemble a circuit—so, let's see how that works.

Assembling the circuit

Before we are able to read and display the sensor data, we need to assemble the circuit. We are connecting the BME/BMP280 sensor using the I2C interface, and we are going to connect the ST7735 display using the SPI interface. To do so, perform the following steps:

  1. Place the BME/BMP280 sensor with serial data pin (SDA) in F21.
  2. Connect...