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)

Conventions

In this book, you will find a number of text styles that distinguish between different kinds of information. Here are some examples of these styles and an explanation of their meaning.

Code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles are shown as follows: "The cat command is commonly used to output the contents of text files, and /proc/asound is a directory."

A block of code is set as follows:

#!/bin/bash 
sudo echo 17 > /sys/class/gpio/export 
sudo echo in > /sys/class/gpio/gpio17/direction 
 
# loop forever 
while true 
do 
  # read the beam state 
  BEAM=$(sudo cat /sys/class/gpio/gpio17/value)

Any command-line input or output is written as follows:

pi@raspberrypi ~ $ cat /proc/asound/cards

New terms and important words are shown in bold. Words that you see on the screen, for example, in menus or dialog boxes, appear in the text like this: "Just right-click on the image file and select Send to, then click on Compressed (zipped) folder."

Note

Warnings or important notes appear in a box like this.

Tip

Tips and tricks appear like this.