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

Smart light – working with digital sensor

After writing our first C/C++ program for Raspberry Pi, we can now write a program that will take input from an LDR sensor and turn the LED on or off. For this project, you will need the following hardware components:

  • 1 LDR sensor module
  • 1 LED
  • Raspberry Pi
  • 5 female-to-female connecting wires

First, let's explore how the LDR sensor works.

The LDR sensor and the way it works

An LDR sensor is an analog input sensor that consists of a variable resistor whose resistance varies depending on the amount of light falling on its surface. When there is no light in the room, the resistance of the LDR sensor is HIGH (up to 1 M ohm) and in the presence of light, the resistance of the...