Book Image

Raspberry Pi for Secret Agents - Third Edition

Book Image

Raspberry Pi for Secret Agents - Third Edition

Overview of this book

This book is for all mischievous Raspberry Pi owners who’d like to see their computer transform into a neat spy gadget to be used in a series of practical pranks and projects. No previous skills are required to follow along, and if you’re completely new to Linux, you’ll pick up much of the basics for free. We’ll help you set up your Raspberry Pi Zero, Raspberry Pi 2 and Raspberry Pi 3 and guide you through a number of pranks and secret agent techniques that are so inconspicuous yet high on mischief. You’ll learn how to configure your operating system for maximum mischief and start exploring audio, video, or Wi-Fi techniques. We’ll show you how to record, listen, or talk to people from a distance and how to set up your own phone network. Then, you’ll plug in your webcam and set up a motion detector with an alarm and find out what the other computers on your Wi-Fi network are up to. Once you’ve mastered the techniques, we’ll combine them with a battery pack and GPS for the ultimate off-road spy kit.
Table of Contents (7 chapters)

Listening in on conversations from a distance


What if we want to listen in on some event live as it goes down, but from a safe distance away from where the Pi's recording-exactly like a baby monitor?

We would need a way of broadcasting whatever is recorded across a network to another computer that we can listen to. Actually, we already have everything required to do this, SSH and SoX; one just has to know how to compose the command lines to wield these powerful tools.

Listening in Windows

You should have the full PuTTY suite installed from the Connecting to the Pi from Windows section in Chapter 1, Getting Up to No Good, as we will be using the plink and pscp commands for this example.

If you didn't download the full PuTTY suite, then you can download the suite or the individual Plink and Pscp packages from here, http://www.chiark.greenend.org.uk/~sgtatham/putty/download.html.

To download SoX for Windows, visit http://sourceforge.net/projects/sox/files/sox/ and click on the download link for...