Raspberry Pi Blueprints电子书

Raspberry Pi Blueprints

Table of Contents

Raspberry Pi Blueprints

Credits

About the Author

About the Reviewers

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Preface

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Downloading the example code

Downloading the color images of this book

Errata

Piracy

Questions

1. Raspberry Pi Pirate Radio

What you will need

Setting up the Pi

Choosing a Linux distribution

Writing an SD card

Windows

Linux and Mac OS

Booting the Pi for the first time

Network scanning

Connecting to the Pi via SSH

Common Linux commands

The initial setup

Setting up the pirate radio

Transferring MP3 files to the Pi

Scripting a media player

Calling PiFM from Python

Searching for MP3 files

Getting input from a command line

Queuing the media files to be played

Using the media player script

Summary

2. Portable Speaker System

What you will need

Tools you will need

Setting up Logitech Media Server

Setting up the Pi as a Squeezebox client

Setting up Wi-Fi on the Pi

Running squeezelite as a daemon

Building the electronics

The amplifier circuit

Running the speaker system on battery power

Building the enclosure for the speaker system

Running Logitech Media Server on the Pi

Creating a backup image of an SD card

Automounting a USB storage device

Installing Logitech Media Server

Setting up the Pi as a Wi-Fi access point

Summary

3. Mini Retro Arcade Cabinet

Requirements

Setting up the input electronics

Building the cabinet

Setting up PiPlay

Using the buttons and joystick with PiPlay

Summary

4. GPS-enabled Time-lapse Recorder

What you will need

Setting up the hardware

The camera board

Connecting the camera module to the Pi

Setting up the Raspberry Pi camera

The GPS module

Setting up the capture software

Using the captures

Creating a time-lapse video

Exporting GPS data as CSV

Summary

5. Home Theater PC

What you will need

Setting up OpenELEC

The first boot and initial setup

Connecting the Pi to a wireless network

Uploading media files to the Pi

Windows

Linux

Shutting down the Pi

Setting up the LCD

Setting up the switches

Final assembly

Summary

6. Outdoor Weather Station

What you will need

Reverse engineering the Maplin sensors

Understanding the sensors

Wiring

Setting up your Arduino

Setting up the remaining sensors

DHT11/22

BMP180

The weather station web application

Deploying the app on the Pi

Taking readings from the sensors

Assembling the weather station

Using the web application

Summary

7. Home Security System

What you will need

The security system structure

Designing your security system

Web applications

Deploying our application

Configuring sensors and alarms

Interfacing sensors

The PIR motion sensors

Magnetic door sensors

The RF network

Setting up the Raspberry Pi

Setting up Arduino

Troubleshooting

Summary

8. Remote-operated Robotic Arm

What you will need

Drive electronics

Setting up the camera

Deploying web applications

The arm and chassis construction

Calibration

Chassis motors

Arm 2 and hand servos

The arm 1 servos

Troubleshooting

The video stream has a substantial delay

The servos make a loud humming noise

Control of the robot is lost

The arm jumps to new positions

Summary

9. Magic Mirror

What you will need

Tools you will need

Theory

The web application

Developing a new widget

The Python code

The Jinja page template

The JavaScript code

The Pi setup

Rotating the display

Deploying the web application

Setting up Chromium

Enclosure construction

Building the mirror without an enclosure

The Pi enclosure

Configuration

Widgets

Included widgets

Example configurations

bbc_ticker.conf

clock.conf

Styles

Troubleshooting

The web application fails with the 500 Internal Server Error

The display does not work

Summary

10. Bottle Xylophone

What you will need

Assembling a note bottle

Electronics

The web application

Configuration

Tuning

Testing

Troubleshooting

Notes are missed

Servos do not move correctly

Summary

Index