Book Image

Hands-On Embedded Programming with Qt

By : John Werner
Book Image

Hands-On Embedded Programming with Qt

By: John Werner

Overview of this book

Qt is an open source toolkit suitable for cross-platform and embedded application development. This book uses inductive teaching to help you learn how to create applications for embedded and Internet of Things (IoT) devices with Qt 5. You’ll start by learning to develop your very first application with Qt. Next, you’ll build on the first application by understanding new concepts through hands-on projects and written text. Each project will introduce new features that will help you transform your basic first project into a connected IoT application running on embedded hardware. In addition to gaining practical experience in developing an embedded Qt project, you will also gain valuable insights into best practices for Qt development and explore advanced techniques for testing, debugging, and monitoring the performance of Qt applications. The examples and projects covered throughout the book can be run both locally and on an embedded platform. By the end of this book, you will have the skills you need to use Qt 5 to confidently develop modern embedded applications.
Table of Contents (22 chapters)
Free Chapter
1
Section 1: Getting Started with Embedded Qt
5
Section 2: Working with Embedded Qt
10
Section 3: Deep Dive into Embedded Qt
14
Section 4: Advanced Techniques and Best Practices
Appendix A: BigProject Requirements

Weaving a web of sockets

Never quite happy with what we give them, marketing has decided we need to add yet another feature to the BigProject:

  • Requirement 20: It should be possible to remotely monitor the temperature reading

To implement this requirement, we will use WebSocket. A WebSocket is a bi-directional connection over TCP (the first part of TCP/IP) that is commonly used with web applications. Because we are learning about Qt, we will use Qt's WebSocket support.

Websockets require two halves—a server that provides data and a client that consumes the data. Every time new data is available, the server will send the data down the WebSocket to the client using JSON. The client will then determine how it wants to handle the data.

The more I work with Qt, the more I enjoy it. It feels like the Qt Framework was developed by real engineers who wanted to solve real...