Book Image

Raspberry Pi By Example

By : Arush Kakkar
Book Image

Raspberry Pi By Example

By: Arush Kakkar

Overview of this book

Want to put your Raspberry Pi through its paces right out of the box? This tutorial guide is designed to get you learning all the tricks of the Raspberry Pi through building complete, hands-on hardware projects. Speed through the basics and then dive right in to development! Discover that you can do almost anything with your Raspberry Pi with a taste of almost everything. Get started with Pi Gaming as you learn how to set up Minecraft, and then program your own game with the help of Pygame. Turn the Pi into your own home security system with complete guidance on setting up a webcam spy camera and OpenCV computer vision for image recognition capabilities. Get to grips with GPIO programming to make a Pi-based glowing LED system, build a complete functioning motion tracker, and more. Finally, get ready to tackle projects that push your Pi to its limits. Construct a complete Internet of Things home automation system with the Raspberry Pi to control your house via Twitter; turn your Pi into a super-computer through linking multiple boards into a cluster and then add in advanced network capabilities for super speedy processing!
Table of Contents (22 chapters)
Raspberry Pi By Example
Credits
About the Authors
About the Reviewers
www.PacktPub.com
Preface
Index

Intruder detection system


Do you have any data that would cause damage if it fell into the wrong hands? Or do you wish to know who enters a specific place when you're not present? Well, you can now easily answer these questions by building your own intruder detection system!

As mentioned before, this project uses an ultrasonic range sensor for the GrovePi and a PiCam to take pictures if any movement is detected by the ultrasonic ranger. Connect the ultrasonic ranger to port D4 of the Grove Pi, the buzzer to D5, the status LED to D3, and the Pi Camera to the port provided on the Raspberry Pi as learned in Chapter 4, Working with Webcam and Pi Camera. Following the theme of the book, we will first look at the whole code, and then learn what each statement does, line by line:

import picamera
import grovepi
from time import sleep

camera = picamera.PiCamera()
counter = 0
led = 3
buzzer = 5
ultrasonic = 4

while True:
    try:
        if grovepi.ultrasonicRead(ultrasonic) < 100:
        print...