To get the most out of this book

The reader is expected to have basic knowledge of C++. While some knowledge of C++11 is helpful, new features are explained when we come to them. You should also have experience with using Linux shell commands. You will also want to get an embedded target. For this book, we will be using a Raspberry Pi 3B+ with a couple of extra pieces of hardware. The details can be found in Chapter 1, Setting Up the Environment. However, you can work through most of the first two chapters without having the hardware!

Download the example code files

You can download the example code files for this book from your account at www.packt.com. If you purchased this book elsewhere, you can visit www.packt.com/support and register to have the files emailed directly to you.

You can download the code files by following these steps:

1. Log in or register at www.packt.com.
2. Select the SUPPORT tab.
3. Click on Code Downloads & Errata.
4. Enter the name of the book in the Search box and follow the onscreen instructions.

Once the file is downloaded, please make sure that you unzip or extract the folder using the latest version of:

• WinRAR/7-Zip for Windows
• Zipeg/iZip/UnRarX for Mac
• 7-Zip/PeaZip for Linux

The code bundle for the book is also hosted on GitHub at https://github.com/PacktPublishing/Hands-On-Embedded-Programming-with-Qt. In case there's an update to the code, it will be updated on the existing GitHub repository.

We also have other code bundles from our rich catalog of books and videos available at https://github.com/PacktPublishing/. Check them out!

Download the color images

We also provide a PDF file that has color images of the screenshots/diagrams used in this book. You can download it here: https://static.packt-cdn.com/downloads/9781789952063_ColorImages.pdf.

Code in Action

To see the code being executed, please visit the following link:

http://bit.ly/2Jb2Yzv.

Conventions used

There are a number of text conventions used throughout this book.

CodeInText: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: "Because we are using a Raspberry Pi 3B+, you will want to use the qt-raspberrypi3-2gb.img.xz file."

A block of code is set as follows:

void MainWindow::on_pushButton_clicked()
{
    QString name = ui->lineEdit->selectedText();
    ui->label->setText(QString("Nice to meet you %1!").arg(name));
}

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

// find the sensor and start it
 m_sensor = new QAmbientTemperatureSensor(this);
 m_connected = m_sensor->connectToBackend();
 m_sensor->start();

Any command-line input or output is written as follows:

[On Host]$ # fetch the code
[On Host]$ cd ~/raspi
[On Host]$ git clone https://code.qt.io/qt/qtknx.git
[On Host]$ cd qtknx/

Bold: Indicates a new term, an important word, or words that you see on screen. For example, words in menus or dialog boxes appear in the text like this. Here is an example: "You can always jump back to the Welcome screen by hitting the Welcome icon at the top of the left-hand icon menu."

Warnings or important notes appear like this.

Tips and tricks appear like this.