Raspberry Pi Cookbook for Python Programmers电子书

Raspberry Pi Cookbook for Python Programmers

Table of Contents

Raspberry Pi Cookbook for Python Programmers

Credits

About the Author

About the Reviewers

www.PacktPub.com

Support files, eBooks, discount offers and more

Why Subscribe?

Free Access for Packt account holders

Preface

What this book covers

What you need for this book

Who this book is for

Safety and using electronics

Conventions

Reader feedback

Customer support

Downloading the example code

Downloading the color images of this book

Errata

Piracy

Questions

1. Getting Started with a Raspberry Pi Computer

Introduction

Introducing the Raspberry Pi

What is with the name?

Why Python?

Python 2 and Python 3

Which version of Python should you use?

Connecting the Raspberry Pi

Getting ready

How to do it…

There's more…

Secondary hardware connections

Using NOOBS to set up your Raspberry Pi SD card

Getting ready

How to do it…

How it works…

There's more…

Changing the default user password

Ensuring that you shut down safely

Preparing an SD card manually

Expanding the system to fit in your SD card

Accessing the Data/RECOVERY/BOOT partition

Using the tools to backup your SD card in case of failure

Networking and connecting your Raspberry Pi to the Internet via the LAN connector

Getting ready

How to do it…

There's more…

Configuring your network manually

Getting ready

How to do it…

There's more…

Networking directly to a laptop or computer

Getting ready

How to do it…

How it works…

There's more…

Direct network link

See also

Networking and connecting your Raspberry Pi to the Internet via a USB Wi-Fi dongle

Getting ready

How to do it…

There's more…

Using USB wired network adapters

Connecting to the Internet through a proxy server

Getting ready

How to do it…

How it works…

There's more…

Connecting remotely to the Raspberry Pi over the network using VNC

Getting ready

How to do it…

There's more…

Connecting remotely to the Raspberry Pi over the network using SSH (and X11 Forwarding)

Getting ready

How to do it…

How it works…

There's more…

Running multiple programs with X11 Forwarding

Running as a desktop with X11 Forwarding

Running PyGame and Tkinter with X11 Forwarding

Sharing the home folder of the Raspberry Pi with SMB

Getting ready

How to do it…

Keeping the Raspberry Pi up to date

Getting ready

How to do it…

2. Starting with Python Strings, Files, and Menus

Introduction

Working with text and strings

Getting ready

How to do it…

How it works…

There's more…

Using files and handling errors

Getting ready

How to do it…

How it works…

Creating a boot-up menu

How to do it…

How it works…

There's more…

Creating a self-defining menu

How to do it…

How it works…

There's more…

Alternative script locations

Adding scripts to PATH

3. Using Python for Automation and Productivity

Introduction

Using Tkinter to create graphical user interfaces

Getting ready

How to do it…

How it works…

Creating a graphical application Start menu

Getting ready

How to do it…

How it works…

There's more…

Displaying photo information in an application

Getting ready

How to do it…

How it works…

There's more…

Organizing your photos automatically

Getting ready

How to do it…

How it works…

4. Creating Games and Graphics

Introduction

Using IDLE3 to debug your programs

How to do it…

How it works…

Drawing lines using a mouse on Tkinter Canvas

Getting ready

How to do it…

How it works…

Creating a bat and ball game

Getting ready

How to do it…

How it works…

Creating an overhead scrolling game

Getting ready

How to do it…

How it works…

5. Creating 3D Graphics

Introduction

Starting with 3D coordinates and vertices

Getting ready

How to do it…

How it works…

There's more…

Camera

Shaders

Lights

Textures

Creating and importing 3D models

Getting ready

How to do it…

How it works...

There's more…

Creating or loading your own objects

Changing the object's textures and .mtl files

Taking screenshots

Creating a 3D world to roam in

Getting ready

How to do it…

How it works…

Building 3D maps and mazes

Getting ready

How to do it…

How it works...

There's more...

The Building module

Using SolidObjects to detect collisions

6. Using Python to Drive Hardware

Introduction

Controlling an LED

Getting ready

How to do it…

How it works…

There's more…

Controlling the GPIO current

Responding to a button

Getting ready

How to do it…

How it works…

There's more…

Safe voltages

Pull-up and pull-down resistor circuits

Protection resistors

A controlled shutdown button

Getting ready

How to do it…

How it works…

There's more…

Resetting and rebooting Raspberry Pi

Adding extra functions

Relocating to the P5 header

The GPIO keypad input

Getting ready

How to do it…

How it works…

There's more…

Generating other key combinations

Emulating mouse events

Multiplexed color LEDs

Getting ready

How to do it…

How it works…

There's more…

Hardware multiplexing

Displaying random patterns

Mixing multiple colors

7. Sense and Display Real-world Data

Introduction

Using devices with the I2C bus

Getting ready

How to do it...

How it works...

There's more...

Using multiple I2C devices

I2C bus and level shifting

Using just the PCF8591 chip or adding alternative sensors

Reading analog data using an analog-to-digital converter

Getting ready

How to do it...

How it works...

There's more...

Gathering analog data without hardware

Logging and plotting data

Getting ready

How to do it...

How it works...

There's more...

Plotting live data

Scaling and calibrating data

Extending the Raspberry Pi GPIO with an I/O expander

Getting ready

How to do it...

How it works...

There's more…

I/O expander voltages and limits

Using your own I/O expander module

Directly controlling an LCD alphanumeric display

Sensing and sending data to online services

Getting ready

How to do it...

How it works...

See also

8. Creating Projects with the Raspberry Pi Camera Module

Introduction

Getting started with the Raspberry Pi camera module

Getting ready

How to do it…

How it works…

Using the camera with Python

Getting ready

How to do it…

How it works…

There's more…

Class member and static functions

Using a USB webcam instead

Additional drivers for the Raspberry Pi camera

See also

Generating a time-lapse video

Getting ready

How to do it…

How it works…

There's more…

Class inheritance and function overriding

Disabling the camera LED

Pi NoIR – taking night shots

Creating a stop frame animation

Getting ready

How to do it…

How it works…

There's more…

Improving the focus

Creating a hardware shutter

Making a QR code reader

Getting ready

How to do it…

How it works…

There's more…

Generating QR codes

See also

9. Building Robots

Introduction

Building a Rover-Pi robot with forward driving motors

Getting ready

How to do it…

How it works…

There's more…

Darlington array circuits

Transistor and relay circuits

Tethered or untethered robots

Rover kits

Using advanced motor control

Getting ready

How to do it…

How it works…

There's more…

Motor speed control using PWM control

Using I/O expanders

Building a six-legged Pi-Bug robot

Getting ready

How to do it…

How it works…

Controlling the servos

The servo class

Learning to walk

The Pi-Bug code for walking

Avoiding objects and obstacles

Getting ready

How to do it…

How it works…

There's more…

Ultrasonic reversing sensors

Getting a sense of direction

Getting ready

How to do it…

How it works…

There's more…

Calibrating the compass

Calculating the compass bearing

Saving the calibration

Driving the robot using the compass

10. Interfacing with Technology

Introduction

Automating your home with remote sockets

Getting ready

How to do it...

How it works...

There's more...

Sending RF control signals directly

Using SPI to control an LED matrix

Getting ready

How to do it…

How it works...

There's more...

Daisy-chain SPI configuration

Communicating using a serial interface

Getting ready

How to do it...

How it works...

There's more...

Configuring a USB to RS232 device for the Raspberry Pi

RS232 signals and connections

Using the GPIO built-in serial pins

The RS232 loopback

Controlling the Raspberry Pi over Bluetooth

Getting ready

How to do it...

How it works...

There's more...

Configuring Bluetooth module settings

Controlling USB devices

Getting ready

How to do it...

How it works...

There's more...

Controlling similar missile-type devices

Robot arm

Taking USB control further

A. Hardware and Software List

Introduction

General component sources

Hardware list

Software list

PC software utilities

Raspberry Pi packages

There's more...

APT commands

Pip Python package manager commands

Index