Book Image

BeagleBone Robotic Projects. - Second Edition

Book Image

BeagleBone Robotic Projects. - Second Edition

Overview of this book

BeagleBone Blue is effectively a small, light, cheap computer in a similar vein to Raspberry Pi and Arduino. It has all of the extensibility of today’s desktop machines, but without the bulk, expense, or noise. This project guide provides step-by-step instructions that enable anyone to use this new, low-cost platform in some fascinating robotics projects. By the time you are finished, your projects will be able to see, speak, listen, detect their surroundings, and move in a variety of amazing ways. The book begins with unpacking and powering up the components. This includes guidance on what to purchase and how to connect it all successfully, and a primer on programming the BeagleBone Blue. You will add additional software functionality available from the open source community, including making the system see using a webcam, hear using a microphone, and speak using a speaker. You will then learn to use the new hardware capability of the BeagleBone Blue to make your robots move, as well as discover how to add sonar sensors to avoid or find objects. Later, you will learn to remotely control your robot through iOS and Android devices. At the end of this book, you will see how to integrate all of these functionalities to work together, before developing the most impressive robotics projects: Drone and Submarine.
Table of Contents (18 chapters)
Title Page
Credits
Foreword
About the Author
About the Reviewers
www.PacktPub.com
Customer Feedback
Preface

Connecting the BeagleBone Blue to a GPS device


Unpack your GPS device; it is time to get started. Before we get started, let me first give you a brief tutorial on GPS. GPS, which stands for Global Positioning System, is a system of satellites that transmit signals. GPS devices use these signals to calculate a position. There are a total of 24 satellites transmitting signals all around the Earth at any given moment, but your device can only see the signal from a much smaller set of satellites.

Each of these satellites transmits a very accurate time signal that your device can receive and interpret. It receives the time signal from each of these satellites, and then based on the delay, that is the time it takes the signal to reach the device, it calculates the receiver's position based on a procedure called triangulaion. The following two diagrams illustrate how the device uses the delay differences from three satellites to calculate its position:

The GPS device is able to detect the three signals...