Book Image

ROS Robotics By Example, Second Edition - Second Edition

By : Carol Fairchild, Lentin Joseph, Dr. Thomas L. Harman
Book Image

ROS Robotics By Example, Second Edition - Second Edition

By: Carol Fairchild, Lentin Joseph, Dr. Thomas L. Harman

Overview of this book

ROS is a robust robotics framework that works regardless of hardware architecture or hardware origin. It standardizes most layers of robotics functionality from device drivers to process control and message passing to software package management. But apart from just plain functionality, ROS is a great platform to learn about robotics itself and to simulate, as well as actually build, your first robots. This does not mean that ROS is a platform for students and other beginners; on the contrary, ROS is used all over the robotics industry to implement flying, walking and diving robots, yet implementation is always straightforward, and never dependent on the hardware itself. ROS Robotics has been the standard introduction to ROS for potential professionals and hobbyists alike since the original edition came out; the second edition adds a gradual introduction to all the goodness available with the Kinetic Kame release. By providing you with step-by-step examples including manipulator arms and flying robots, the authors introduce you to the new features. The book is intensely practical, with space given to theory only when absolutely necessary. By the end of this book, you will have hands-on experience on controlling robots with the best possible framework.
Table of Contents (18 chapters)
ROS Robotics By Example Second Edition
Credits
About the Authors
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface
Index

Creating ROS nodes on Arduino or Raspberry Pi


Arduino and Raspberry Pi are two of the most popular embedded systems on the market today. Sometimes, their names and capabilities are discussed interchangeably, but each platform has its own unique capabilities and usage. In robotics, it is important to know the merits of each of these powerful devices and how each one can be used with ROS to inherit the advantages of ROS.

Rosserial defines the protocol for ROS communication over serial transmission lines to ROS nodes running on microcontrollers or single-board computers. Standard ROS messages are serialized/deserialized in a prescribed format, and topics and services are multiplexed for serial ports or network sockets. For low-level details of this protocol, refer to http://wiki.ros.org/rosserial/Overview/Protocol.

In the following section, the capability of rosserial is demonstrated in an example program using Arduino and an ultrasonic sensor.

Using Arduino

The Arduino board contains a microcontroller...