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

Networking the netbook and remote computer


ROS has the ability to allow multiple computers to communicate and share nodes, topics, and services. In the case of TurtleBot, the netbook has limited capabilities for graphics applications, such as rviz. It is better to run rviz and other visualization software on a desktop computer or a powerful laptop, both of which will be called a remote computer here to distinguish it from the netbook that rides along with the TurtleBot.

The approach is to designate one computer in the network to run the ROS Master identified by the ROS_MASTER_URI variable and launch the roscore process from that computer. The choice is to set up TurtleBot's netbook as the Master since many applications of the TurtleBot require autonomous motion without the intervention of the remote computer.

Any other remote computer on the network will have its own IP address as the ROS_IP address but its ROS_MASTER_URI variable will be TurtletBot 2's netbook IP address.

Types of networks...