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Hands-On Mobile and Embedded Development with Qt 5

By : Potter

4.5 (2)

Buy this Book

Hands-On Mobile and Embedded Development with Qt 5

4.5 (2)

By: Potter

Buy this Book

Overview of this book

Qt is a world-class framework, helping you to develop rich graphical user interfaces (GUIs) and multi-platform applications that run on all major desktop platforms and most mobile or embedded platforms. The framework helps you connect the dots across platforms and between online and physical experience. This book will help you leverage the fully-featured Qt framework and its modular cross-platform library classes and intuitive APIs to develop applications for mobile, IoT, and industrial embedded systems. Considerations such as screen size, device orientation changes, and small memory will be discussed. We will focus on various core aspects of embedded and mobile systems, such as connectivity, networking, and sensors; there is no IoT without sensors. You will learn how to quickly design a flexible, fast, and responsive UI that looks great. Going further, you will implement different elements in a matter of minutes and synchronize the UI elements with the 3D assets with high precision. You will learn how to create high-performance embedded systems with 3D/2D user interfaces, and deploy and test on your target hardware. The book will explore several new features, including Qt for WebAssembly. At the end of this book, you will learn about creating a full software stack for embedded Linux systems using Yocto and Boot to Qt for Device Creation.

Preface

Who this book is for

What this book covers

To get the most out of this book

Get in touch

Free Chapter

Section 1: Making Great UIs

Standard Qt Widgets

Hello mobile!

Going smaller, handling screen sizes

Dynamic layouts

Graphics view

Summary

Fluid UI with Qt Quick

Qt Quick basics – anything goes

Qt Quick Controls 2 button, button, who's got the button?

Show your data – Qt Data Visualization and Qt Charts

Animate it!

Summary

Graphical and Special Effects

The universe of particles

Particle painters, emitters, and affectors

Graphical effects for Qt Quick

Summary

Input and Touch

What to do when there's no keyboard

Using touch input

Voice as input

Summary

Section 2: Networking, Connectivity, Sensors, and Automation

Qt Network for Communication

High level – request, reply, and access

Bearer Management of good news

Low level – of sockets and servers

Lookups – look me up

Summary

Connectivity with Qt Bluetooth LE

What is Bluetooth Low Energy?

Implementing a BLE GATT server

Discovery and Pair-ity – search and connect for BLE devices

Specifying and getting client data

Summary

Machines Talking

Sensory control – QtSensor data

WebSockets – Bi-directional web communication

QMqtt – Brokers of machine talk

Summary

Where Am I? Location and Positioning

Positioning with satellites

Mapping the positions

Places of interest

Summary

Section 3: Other APIs Qt SQL, Qt Multimedia, and Qt Purchasing

Sounds and Visions - Qt Multimedia

Sonic vibrations – audio

Image sensors – camera

Visual media – playing video

Tuning it in – FM radio tuner

Summary

Remote Databases with Qt SQL

Technical requirements

Drivers are database backends

Setup

Connecting to a local or remote database

Creating and opening a database

Adding data to the database

Executing queries

Summary

Enabling In-App Purchases with Qt Purchasing

Registering on Android Google Play

Registering on iOS App Store

Creating an in-app product

Restoring purchases

Summary

Section 4: Mobile Deployment and Device Creation

Cross Compiling and Remote Debugging

Cross compiling

Connecting to a remote device

Debugging remotely

Summary

Deploying to Mobile and Embedded

Deployment for Android

Deployment for iOS

Alternative OSes

Embedded Linux

Summary

Universal Platform for Mobiles and Embedded Devices

What is this WebAssembly thing?

Technical requirements

Getting started

Building with the command line

Building with Qt Creator

Deploying for mobile and embedded devices

Tips, tricks, and suggestions

Summary

Building a Linux System

Bootcamp – Boot to Qt

Rolling your own – custom embedded Linux

Deploying to an embedded system

Summary

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Machines Talking

Machine automation and IoT use various APIs for communication with each other.

I like to say that you cannot have IoT without sensors. They truly define IoT. Sensors are everywhere these days. Cars, lights, and mobile phones all have a myriad of sensors. Laptop computers have led, light, touch, and proximity sensors.

MQTT and WebSockets are communication and messaging protocols. One use of them is to send sensors to remote locations.

You will learn about using Qt APIs for machine-to-machine automation and communication to web applications using the QWebSocket and QWebSocketServer classes.

MQTT is a publish-and-subscribe-based TCP/IP protocol for sending sensor data over a limited bandwidth network using QMqttMessage to a QMqttClient and QMqttSubscription.

We will be covering the following topics: