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)

Chapter 7: Displaying Weather Alerts on the TinyGo Wasm Dashboard

We have learned how to display data using different types of displays that are connected using either the Inter-Integrated Circuit (I2C) protocol or the Serial Peripheral Interface (SPI). While doing so, we dived a bit deeper into understanding how SPI works by learning that multiple devices can listen on a SPI bus and that we can daisy-chain devices on the bus. Furthermore, we have built a command-line interface (CLI) that interprets commands sent over serial and executes functions depending on the input.

After working through this chapter, you will be familiar with using Message Queuing Telemetry Transport (MQTT), serving a WebAssembly (Wasm) page through a web server, how to set up a local MQTT broker, and how to use the Wi-Fi functionalities of the Arduino Nano 33 IoT board.

In this chapter, we're going to cover the following main topics:  

  • Building a weather station
  • Sending MQTT...