Raspberry Pi: Amazing Projects from Scratch

567 Pages·2016·18.2 MB·English

by  Ashwin Pajankar

Raspberry Pi: Amazing
Projects from Scratch
Explore the powers of Raspberry Pi and build your very
own projects right out of the box
A course in three modules
BIRMINGHAM - MUMBAI
Raspberry Pi: Amazing Projects from Scratch
Copyright © 2016 Packt Publishing
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Published on: September 2016
Published by Packt Publishing Ltd.
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ISBN 978-1-78712-849-1
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Preface
Machine learning and predictive analytics are becoming one of the key strategies for
unlocking growth in a challenging contemporary marketplace .It is one of the fastest
growing trends in modern computing and everyone wants to get into the field of
machine learning. In order to obtain sufficient recognition in this field, one must be
able to understand and design a machine learning system that serves the needs of a
project. The idea is to prepare a Learning Path that will help you to tackle the real-
world complexities of modern machine learning with innovative and cutting-edge
techniques. Also, it will give you a solid foundation in the machine learning design
process, and enable you to build customized machine learning models to solve
unique problems
What this learning path covers
Module 1, Raspberry Pi By Example, provides you an introduction to the Raspberry Pi.
It helps in building games with PyGame and creation of real-life applications with the
Raspberry Pi. It further demonstrates the GPIO and cameras with advanced concepts
in OpenCV. This module further delves with setting up a web server and creating
network utilities.
Module 2, Building a Home Security System with Raspberry Pi, lets you explore the GPIO
Port along with building input/ output expansion board which helps in overcoming
the limitations on GPIO. It helps you to create log files based on events using Bash
Scripts. This module further covers a miscellany of things for accessing home
security control panel.
Module 3, Raspberry Pi Robotics Essentials, starts with configuring and programming
Raspberry Pi, along with construction of biped platform. It further covers in-depth
planning of biped with the details of connecting webcam, hardware and software in
order to use input visual data into our system.
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Preface
What you need for this learning path
• Module 1, Raspberry Pi By Example, recommends you to use the following
kit:
Raspberry Pi Model B, B+ or 2 (Multiple boards for last two chapters)
USB hub, powered preferably
Networking hub
PC for preparing SD card
Webcam and/or Pi Camera
• Module 2, Building a Home Security System with Raspberry Pi,, will need
the following software:
Gparted dd fake-hwclock
Win32 Disk Imager 0.9.5 PuTTY
i2c-tools
• Module 3, Raspberry Pi Robotics Essentials, asks you to use Raspbian, putty,
Image Writer for Windows, libusb-1.0-0-dev and VncServer.
Who this learning path is for
Novice programmers and hobbyists who want to understand how to use Raspberry
Pi to build interesting projects and home automation systems, as well as for those
who want to delve deeper into the world of Raspberry Pi
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Preface
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PacktPublishing/Raspberry-Pi-Making-Amazing-Projects-Right-from-
Scratch-
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Preface
Errata
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Course Module 1: Raspberry Pi By Example
Chapter 1: Introduction to Raspberry Pi and Python 3
Single-board computers 3
Raspberry Pi 5
Operating systems 9
Setting up the Raspberry Pi 10
Getting started with Python 21
Summary 30
Chapter 2: Minecraft Pi 31
Introduction to Minecraft Pi 31
Playing Minecraft Pi 32
Python programming for Minecraft Pi 40
Summary 46
Chapter 3: Building Games with PyGame 47
Introducing PyGame 47
Installing PyGame 48
Drawing a binary fractal tree 49
Building a snake game 53
Summary 60
Chapter 4: Working with a Webcam and Pi Camera 61
Working with webcams 61
Working with the Pi Camera and NoIR Camera modules 68
Summary 74
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Table of Contents
Chapter 5: Introduction to GPIO Programming 75
Introducing GPIO pins 76
Building an LED Blinker 78
Installing PiGlow 82
Using PiGlow 85
Building a binary clock 87
Summary 91
Chapter 6: Creating Animated Movies with Raspberry Pi 93
Introducing stop-motion animation 93
Setting up the prerequisites 94
Rendering the video 100
Summary 101
Chapter 7: Introduction to Computer Vision 103
Introducing Computer Vision 104
Introducing OpenCV 104
Setting up Pi for Computer Vision 105
Introducing NumPy 108
Working with images 111
Working with Webcam using OpenCV 116
Retrieving image properties 119
Arithmetic operations on images 120
Splitting and merging image color channels 124
Logical operations on images 126
Colorspaces and conversions 128
Tracking in real time based on color 131
Summary 132
Chapter 8: Creating Your Own Motion Detection and
Tracking System 133
Thresholding images 133
Noise 138
Morphological transformations on images 143
Motion detection and tracking 144
Summary 148
Chapter 9: Grove Sensors and the Raspberry Pi 149
Introducing the GrovePi 149
Setting up the GrovePi 151
Displaying the weather 156
Intruder detection system 159
Summary 161
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Table of Contents
Chapter 10: Internet of Things with the Raspberry Pi 163
Introducing the Internet of Things 164
Installing the Twitter API for Python 164
Setting up a SQLite database in Python 170
Building a tweeting weather station 174
Summary 180
Chapter 11: Build Your Own Supercomputer with Raspberry Pi 181
Introducing a Pi-based supercomputer 182
Installing and configuring MPICH2 and MPI4PY 182
Setting up the Raspberry Pi cluster 190
Setting up SSH access from the host to the client 193
Running code in parallel 195
Performance benchmarking of the cluster 196
Introducing N-Body simulations 196
Installing and running GalaxSee 198
Summary 201
Chapter 12: Advanced Networking with Raspberry Pi 203
Introducing DHCP 203
A few networking concepts 204
Configuring a Raspberry Pi to act as a DHCP server 206
Introducing Domain Naming System (DNS) 210
Setting up a DNS server on the Pi 211
Configuring the setup for a web server 213
Automating node discovery in a network 215
Summary 217
Chapter 13: Setting Up a Web Server on the Raspberry Pi 219
Introducing and installing Apache on Raspbian 220
Installing PHP and MySQL 222
Installing WordPress 223
Summary 231
Chapter 14: Network Programming in Python with the Pi 233
The basics of sockets 233
The difference between TCP and UDP 234
Looking back 254
A Telnet client in Python 254
A chat program 256
References 261
Exercise 262
Summary 262
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Table of Contents
Chapter 15: Newer Raspberry Pi Models 263
The Raspberry Pi Zero 263
The Raspberry Pi 3 268
Course Module 2: Building a Home Security System with
Raspberry Pi
Chapter 1: Setting Up Your Raspberry Pi 273
Which flavor of Pi? 273
Preparing the SD card 278
Setting up your Pi 284
Summary 290
Chapter 2: Connecting Things to Your Pi with GPIO 291
Prerequisites 291
Say hello to the GPIO 292
Getting acquainted with the GPIO 296
The most elaborate light switch in the world 303
Summary 305
Chapter 3: Extending Your Pi to Connect More Things 307
Prerequisites 307
The I2C bus 308
Give me power 310
Building an I2C expander 312
Using ready-made expansion boards 317
Summary 319
Chapter 4: Adding a Magnetic Contact Sensor 321
Prerequisites 321
The working of magnetic contact sensors 322
Setting up the I2C port expander 324
Connecting our magnetic contact sensor 329
Monitoring the sensor 331
Anti-tamper circuits 332
Getting into the zone 334
Summary 336
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