Book Image

Hands-On Robotics Programming with C++

By : Dinesh Tavasalkar, Lentin Joseph
Book Image

Hands-On Robotics Programming with C++

By: Dinesh Tavasalkar, Lentin Joseph

Overview of this book

C++ is one of the most popular legacy programming languages for robotics, and a combination of C++ and robotics hardware is used in many leading industries. This book will bridge the gap between Raspberry Pi and C/C++ programming and enable you to develop applications for Raspberry Pi. You'll even be able to implement C programs in Raspberry Pi with the WiringPi library. The book will guide you through developing a fully functional car robot and writing programs to move it in different directions. You’ll then create an obstacle-avoiding robot using an ultrasonic sensor. In addition to this, you’ll find out how to control the robot wirelessly using your PC or Mac. This book will also help you work with object detection and tracking using OpenCV, and guide you through exploring face detection techniques. Finally, you will create an Android app and control the robot wirelessly with an Android smartphone. By the end of this book, you will have gained experience in developing a robot using Raspberry Pi and C/C++ programming.
Table of Contents (16 chapters)
Free Chapter
1
Section 1: Getting Started with wiringPi on a Raspberry Pi
4
Section 2: Raspberry Pi Robotics
8
Section 3: Face and Object Recognition Robot
12
Section 4: Smartphone-Controlled Robot

Controlling LEDs with GUI buttons

In this section, we will create a simple QT5 program in which we will turn the LEDs on and off using the GUI buttons. For this project, you will need two LEDs:

The wiring connections of the LEDs is exactly the same as that in the LEDBuzzer project:

  • The anode (positive) pin of the first LED is connected to the wiringPi pin number 0 and the cathode (negative) pin is connected the physical pin number 9 (the ground pin)
  • The anode pin of the second LED is connected to the wiringPi pin number 2 and the cathode pin is connected to the physical pin number 14 (the ground pin)

Creating a QT project

The QT5 project for turning the LEDs on and off is called LedOnOff. You can download this project...