Raspberry Pi Cookbook, 4th Edition (Final Release)

Cover
Copyright
Table of Contents
Preface to the Fourth Edition
	Using This Book
	Conventions Used in This Book
	Using Code Examples
	O’Reilly Online Learning
	How to Contact Us
	Acknowledgments
Chapter 1. Setup and Management
	1.0 Introduction
	1.1 Selecting a Model of Raspberry Pi
		Problem
		Solution
		Discussion
		See Also
	1.2 Connecting the System
		Problem
		Solution
		Discussion
		See Also
	1.3 Enclosing a Raspberry Pi
		Problem
		Solution
		Discussion
		See Also
	1.4 Selecting a Power Supply
		Problem
		Solution
		Discussion
		See Also
	1.5 Selecting an Operating System
		Problem
		Solution
		Discussion
		See Also
	1.6 Installing an Operating System Using Raspberry Pi Imager
		Problem
		Solution
		Discussion
		See Also
	1.7 Booting Up Your Raspberry Pi for the First Time
		Problem
		Solution
		Discussion
		See Also
	1.8 Setting Up a Headless Raspberry Pi
		Problem
		Solution
		Discussion
		See Also
	1.9 Booting from a Real Hard Disk or USB Flash Drive
		Problem
		Solution
		Discussion
		See Also
	1.10 Connecting a DVI or VGA Monitor
		Problem
		Solution
		Discussion
		See Also
	1.11 Using a Composite Video Monitor/TV
		Problem
		Solution
		Discussion
		See Also
	1.12 Adjusting the Picture Size on Your Monitor
		Problem
		Solution
		Discussion
		See Also
	1.13 Maximizing Performance
		Problem
		Solution
		Discussion
		See Also
	1.14 Changing Your Password
		Problem
		Solution
		Discussion
		See Also
	1.15 Shutting Down Your Raspberry Pi
		Problem
		Solution
		Discussion
		See Also
	1.16 Installing the Raspberry Pi Camera Module
		Problem
		Solution
		Discussion
		See Also
	1.17 Using Bluetooth
		Problem
		Solution
		Discussion
		See Also
Chapter 2. Networking
	2.0 Introduction
	2.1 Connecting to a Wired Network
		Problem
		Solution
		Discussion
		See Also
	2.2 Finding Your IP Address
		Problem
		Solution
		Discussion
		See Also
	2.3 Setting a Static IP Address
		Problem
		Solution
		Discussion
		See Also
	2.4 Setting the Network Name of a Raspberry Pi
		Problem
		Solution
		Discussion
		See Also
	2.5 Setting Up a Wireless Connection
		Problem
		Solution
		Discussion
		See Also
	2.6 Connecting with a Console Lead
		Problem
		Solution
		Discussion
		See Also
	2.7 Controlling the Pi Remotely with SSH
		Problem
		Solution
		Discussion
		See Also
	2.8 Controlling the Pi Remotely with VNC
		Problem
		Solution
		Discussion
		See Also
	2.9 Using a Raspberry Pi for Network-Attached Storage
		Problem
		Solution
		Discussion
		See Also
	2.10 Setting Up a Network Printer
		Problem
		Solution
		Discussion
		See Also
Chapter 3. Operating System
	3.0 Introduction
	3.1 Browsing Files Graphically
		Problem
		Solution
		Discussion
		See Also
	3.2 Copying Files onto a USB Flash Drive
		Problem
		Solution
		Discussion
		See Also
	3.3 Starting a Terminal Session
		Problem
		Solution
		Discussion
		See Also
	3.4 Navigating the Filesystem Using a Terminal
		Problem
		Solution
		Discussion
		See Also
	3.5 Copying a File or Folder
		Problem
		Solution
		Discussion
		See Also
	3.6 Renaming a File or Folder
		Problem
		Solution
		Discussion
		See Also
	3.7 Editing a File
		Problem
		Solution
		Discussion
		See Also
	3.8 Viewing the Contents of a File
		Problem
		Solution
		Discussion
		See Also
	3.9 Creating a File Without Using an Editor
		Problem
		Solution
		Discussion
		See Also
	3.10 Creating a Directory
		Problem
		Solution
		Discussion
		See Also
	3.11 Deleting a File or Directory
		Problem
		Solution
		Discussion
		See Also
	3.12 Performing Tasks with Superuser Privileges
		Problem
		Solution
		Discussion
		See Also
	3.13 Understanding File Permissions
		Problem
		Solution
		Discussion
		See Also
	3.14 Changing File Permissions
		Problem
		Solution
		Discussion
		See Also
	3.15 Changing File Ownership
		Problem
		Solution
		Discussion
		See Also
	3.16 Making a Screen Capture
		Problem
		Solution
		Discussion
		See Also
	3.17 Installing Software with apt
		Problem
		Solution
		Discussion
		See Also
	3.18 Removing Software Installed with apt
		Problem
		Solution
		Discussion
		See Also
	3.19 Installing Python Packages with pip3
		Problem
		Solution
		Discussion
		See Also
	3.20 Fetching Files from the Command Line
		Problem
		Solution
		Discussion
		See Also
	3.21 Fetching Source Code with Git
		Problem
		Solution
		Discussion
		See Also
	3.22 Fetching This Book’s Accompanying Code
		Problem
		Solution
		Discussion
		See Also
	3.23 Running a Program Automatically on Startup
		Problem
		Solution
		Discussion
		See Also
	3.24 Running a Program Automatically as a Service
		Problem
		Solution
		Discussion
		See Also
	3.25 Running a Program Automatically at Regular Intervals
		Problem
		Solution
		Discussion
		See Also
	3.26 Finding a File
		Problem
		Solution
		Discussion
		See Also
	3.27 Using the Command-Line History
		Problem
		Solution
		Discussion
		See Also
	3.28 Monitoring Processor Activity
		Problem
		Solution
		Discussion
		See Also
	3.29 Working with File Archives
		Problem
		Solution
		Discussion
		See Also
	3.30 Listing Connected USB Devices
		Problem
		Solution
		Discussion
	3.31 Redirecting Output from the Command Line to a File
		Problem
		Solution
		Discussion
		See Also
	3.32 Concatenating Files
		Problem
		Solution
		Discussion
		See Also
	3.33 Using Pipes
		Problem
		Solution
		Discussion
		See Also
	3.34 Hiding Output to the Terminal
		Problem
		Solution
		Discussion
		See Also
	3.35 Running Programs in the Background
		Problem
		Solution
		Discussion
		See Also
	3.36 Creating Command Aliases
		Problem
		Solution
		Discussion
		See Also
	3.37 Setting the Date and Time
		Problem
		Solution
		Discussion
	3.38 Finding Out How Much Room You Have on the SD Card
		Problem
		Solution
		Discussion
		See Also
	3.39 Finding Out What Operating System Version You Are Running
		Problem
		Solution
		Discussion
		See Also
	3.40 Updating Raspberry Pi OS
		Problem
		Solution
		Discussion
		See Also
Chapter 4. Using Ready-Made Software
	4.0 Introduction
	4.1 Making a Media Center
		Problem
		Solution
		Discussion
		See Also
	4.2 Installing Recommended Software
		Problem
		Solution
		Discussion
		See Also
	4.3 Using Office Software
		Problem
		Solution
		Discussion
		See Also
	4.4 Running a Vintage Game Console Emulator
		Problem
		Solution
		Discussion
		See Also
	4.5 Turning Your Raspberry Pi into a Radio Transmitter
		Problem
		Solution
		Discussion
		See Also
	4.6 Editing Bitmap Images
		Problem
		Solution
		Discussion
		See Also
	4.7 Editing Vector Images
		Problem
		Solution
		Discussion
		See Also
	4.8 Using Bookshelf
		Problem
		Solution
		Discussion
		See Also
	4.9 Playing Internet Radio
		Problem
		Solution
		Discussion
		See Also
	4.10 Using Visual Studio Code
		Problem
		Solution
		Discussion
		See Also
	4.11 Controlling a Laser Cutter
		Problem
		Solution
		Discussion
		See Also
Chapter 5. Python Basics
	5.0 Introduction
	5.1 Deciding Between Python 2 and Python 3
		Problem
		Solution
		Discussion
		See Also
	5.2 Choosing a Python Editor
		Problem
		Solution
		Discussion
		See Also
	5.3 Editing Python Programs with Thonny
		Problem
		Solution
		Discussion
		See Also
	5.4 Editing Python Programs with Mu
		Problem
		Solution
		Discussion
		See Also
	5.5 Using the Python Console
		Problem
		Solution
		Discussion
		See Also
	5.6 Running Python Programs from the Terminal
		Problem
		Solution
		Discussion
		See Also
	5.7 Assigning Names to Values (Variables)
		Problem
		Solution
		Discussion
		See Also
	5.8 Displaying Output
		Problem
		Solution
		Discussion
		See Also
	5.9 Reading User Input
		Problem
		Solution
		Discussion
		See Also
	5.10 Using Arithmetic Operators
		Problem
		Solution
		Discussion
		See Also
	5.11 Creating Strings
		Problem
		Solution
		Discussion
		See Also
	5.12 Concatenating (Joining) Strings
		Problem
		Solution
		Discussion
		See Also
	5.13 Converting Numbers into Strings
		Problem
		Solution
		Discussion
		See Also
	5.14 Converting Strings into Numbers
		Problem
		Solution
		Discussion
		See Also
	5.15 Finding the Length of a String
		Problem
		Solution
		Discussion
		See Also
	5.16 Finding the Position of One String Within Another
		Problem
		Solution
		Discussion
		See Also
	5.17 Extracting Part of a String
		Problem
		Solution
		Discussion
		See Also
	5.18 Replacing One String of Characters with Another Within a String
		Problem
		Solution
		Discussion
		See Also
	5.19 Converting a String to Uppercase or Lowercase
		Problem
		Solution
		Discussion
		See Also
	5.20 Running Commands Conditionally (if)
		Problem
		Solution
		Discussion
		See Also
	5.21 Comparing Values
		Problem
		Solution
		Discussion
		See Also
	5.22 Using Logical Operators
		Problem
		Solution
		Discussion
		See Also
	5.23 Repeating Instructions an Exact Number of Times
		Problem
		Solution
		Discussion
		See Also
	5.24 Repeating Instructions Until Some Condition Changes
		Problem
		Solution
		Discussion
		See Also
	5.25 Breaking Out of a Loop
		Problem
		Solution
		Discussion
		See Also
	5.26 Defining a Function in Python
		Problem
		Solution
		Discussion
		See Also
Chapter 6. Python Lists and Dictionaries
	6.0 Introduction
	6.1 Creating a List
		Problem
		Solution
		Discussion
	6.2 Accessing Elements of a List
		Problem
		Solution
		Discussion
	6.3 Finding the Length of a List
		Problem
		Solution
		Discussion
	6.4 Adding Elements to a List
		Problem
		Solution
		Discussion
	6.5 Removing Elements from a List
		Problem
		Solution
		Discussion
	6.6 Creating a List by Parsing a String
		Problem
		Solution
		Discussion
		See Also
	6.7 Iterating Over a List
		Problem
		Solution
		Discussion
		See Also
	6.8 Enumerating a List
		Problem
		Solution
		Discussion
		See Also
	6.9 Testing if Something Is in a List
		Problem
		Solution
		Discussion
		See Also
	6.10 Sorting a List
		Problem
		Solution
		Discussion
	6.11 Cutting Up a List
		Problem
		Solution
		Discussion
		See Also
	6.12 Using Comprehensions
		Problem
		Solution
		Discussion
		See Also
	6.13 Creating a Dictionary
		Problem
		Solution
		Discussion
		See Also
	6.14 Accessing a Dictionary
		Problem
		Solution
		Discussion
		See Also
	6.15 Removing Entries from a Dictionary
		Problem
		Solution
		Discussion
	6.16 Iterating Over Dictionaries
		Problem
		Solution
		Discussion
		See Also
Chapter 7. Advanced Python
	7.0 Introduction
	7.1 Formatting Numbers
		Problem
		Solution
		Discussion
		See Also
	7.2 Formatting Dates and Times
		Problem
		Solution
		Discussion
		See Also
	7.3 Returning More Than One Value
		Problem
		Solution
		Discussion
		See Also
	7.4 Defining a Class
		Problem
		Solution
		Discussion
		See Also
	7.5 Defining a Method
		Problem
		Solution
		Discussion
		See Also
	7.6 Inheritance
		Problem
		Solution
		Discussion
		See Also
	7.7 Writing to a File
		Problem
		Solution
		Discussion
		See Also
	7.8 Reading from a File
		Problem
		Solution
		Discussion
		See Also
	7.9 Using Pickling to Save and Load Data in a File
		Problem
		Solution
		Discussion
		See Also
	7.10 Handling Exceptions
		Problem
		Solution
		Discussion
		See Also
	7.11 Using Modules
		Problem
		Solution
		Discussion
		See Also
	7.12 Generating Random Numbers
		Problem
		Solution
		Discussion
		See Also
	7.13 Making Web Requests from Python
		Problem
		Solution
		Discussion
		See Also
	7.14 Specifying Command-Line Arguments in Python
		Problem
		Solution
		Discussion
		See Also
	7.15 Running Linux Commands from Python
		Problem
		Solution
		Discussion
		See Also
	7.16 Sending Email from Python
		Problem
		Solution
		Discussion
		See Also
	7.17 Writing a Simple Web Server in Python
		Problem
		Solution
		Discussion
		See Also
	7.18 Doing Nothing in Python
		Problem
		Solution
		Discussion
		See Also
	7.19 Doing More Than One Thing at a Time
		Problem
		Solution
		Discussion
		See Also
	7.20 Parsing JSON Data
		Problem
		Solution
		Discussion
		See Also
	7.21 Saving Dictionaries as JSON Files
		Problem
		Solution
		Discussion
		See Also
	7.22 Creating User Interfaces
		Problem
		Solution
		Discussion
		See Also
	7.23 Using Regular Expressions to Search for Patterns in Text
		Problem
		Solution
		Discussion
		See Also
	7.24 Using Regular Expressions to Validate Data Entry
		Problem
		Solution
		Discussion
		See Also
	7.25 Using Regular Expressions for Web Scraping
		Problem
		Solution
		Discussion
		See Also
Chapter 8. Computer Vision
	8.0 Introduction
	8.1 Installing OpenCV
		Problem
		Solution
		Discussion
		See Also
	8.2 Setting Up a USB Camera for Computer Vision
		Problem
		Solution
		Discussion
		See Also
	8.3 Using a Raspberry Pi Camera Module for Computer Vision
		Problem
		Solution
		Discussion
		See Also
	8.4 Counting Coins
		Problem
		Solution
		Discussion
		See Also
	8.5 Face Detection
		Problem
		Solution
		Discussion
		See Also
	8.6 Motion Detection
		Problem
		Solution
		Discussion
		See Also
	8.7 Extracting Text from an Image
		Problem
		Solution
		Discussion
		See Also
Chapter 9. Machine Learning
	9.0 Introduction
	9.1 Identifying Objects in Video with TensorFlow Lite
		Problem
		Solution
		Discussion
		See Also
	9.2 Reacting to Objects in Video with TensorFlow Lite
		Problem
		Solution
		Discussion
		See Also
	9.3 Identifying Sounds with TensorFlow Lite
		Problem
		Solution
		Discussion
		See Also
	9.4 Reacting to a Whistle with TensorFlow Lite
		Problem
		Solution
		Discussion
		See Also
	9.5 Installing Edge Impulse
		Problem
		Solution
		Discussion
		See Also
	9.6 Recognizing a Spoken Command (in the Cloud)
		Problem
		Solution
		Discussion
		See Also
	9.7 Recognizing a Spoken Command (Locally)
		Problem
		Solution
		Discussion
		See Also
	9.8 Responding to a Spoken Command in Python
		Problem
		Solution
		Discussion
		See Also
Chapter 10. Hardware Basics
	10.0 Introduction
	10.1 Finding Your Way Around the GPIO Connector
		Problem
		Solution
		Discussion
		See Also
	10.2 Using the GPIO Connector on a Raspberry Pi 400
		Problem
		Solution
		Discussion
		See Also
	10.3 Keeping Your Raspberry Pi Safe When Using the GPIO Connector
		Problem
		Solution
		Discussion
		See Also
	10.4 Setting Up I2C
		Problem
		Solution
		Discussion
		See Also
	10.5 Using I2C Tools
		Problem
		Solution
		Discussion
		See Also
	10.6 Setting Up SPI
		Problem
		Solution
		Discussion
		See Also
	10.7 Installing pySerial for Access to the Serial Port from Python
		Problem
		Solution
		Discussion
		See Also
	10.8 Installing Minicom to Test the Serial Port
		Problem
		Solution
		Discussion
		See Also
	10.9 Using a Breadboard with Jumper Leads
		Problem
		Solution
		Discussion
		See Also
	10.10 Using a Raspberry Squid
		Problem
		Solution
		Discussion
		See Also
	10.11 Using a Raspberry Squid Button
		Problem
		Solution
		Discussion
		See Also
	10.12 Converting 5V Signals to 3.3V with Two Resistors
		Problem
		Solution
		Discussion
		See Also
	10.13 Converting 5V Signals to 3.3V with a Level Converter Module
		Problem
		Solution
		Discussion
		See Also
	10.14 Powering a Raspberry Pi with a LiPo Battery
		Problem
		Solution
		Discussion
		See Also
	10.15 Getting Started with the Sense HAT
		Problem
		Solution
		Discussion
		See Also
	10.16 Getting Started with the Explorer HAT Pro
		Problem
		Solution
		Discussion
		See Also
	10.17 Making a HAT
		Problem
		Solution
		Discussion
		See Also
	10.18 Using the Raspberry Pi Zero 2 and Pi Zero 2 W
		Problem
		Solution
		Discussion
		See Also
Chapter 11. Controlling Hardware
	11.0 Introduction
	11.1 Connecting an LED
		Problem
		Solution
		Discussion
		See Also
	11.2 Leaving the GPIO Pins in a Safe State
		Problem
		Solution
		Discussion
		See Also
	11.3 Controlling the Brightness of an LED
		Problem
		Solution
		Discussion
		See Also
	11.4 Switching a High-Power DC Device Using a Transistor
		Problem
		Solution
		Discussion
		See Also
	11.5 Switching a High-Power Device Using a Relay
		Problem
		Solution
		Discussion
		See Also
	11.6 Switching Using a Solid-State Relay
		Problem
		Solution
		Discussion
		See Also
	11.7 Controlling High-Voltage AC Devices
		Problem
		Solution
		Discussion
		See Also
	11.8 Controlling Hardware with Android and Bluetooth
		Problem
		Solution
		Discussion
		See Also
	11.9 Making a User Interface to Turn Things On and Off
		Problem
		Solution
		Discussion
		See Also
	11.10 Making a User Interface to Control PWM Power for LEDs and Motors
		Problem
		Solution
		Discussion
		See Also
	11.11 Making a User Interface to Change the Color of an RGB LED
		Problem
		Solution
		Discussion
		See Also
	11.12 Using an Analog Meter as a Display
		Problem
		Solution
		Discussion
		See Also
Chapter 12. Motors
	12.0 Introduction
	12.1 Controlling Servomotors
		Problem
		Solution
		Discussion
		See Also
	12.2 Controlling Servomotors Precisely
		Problem
		Solution
		Discussion
		See Also
	12.3 Controlling Multiple Servomotors Precisely
		Problem
		Solution
		Discussion
		See Also
	12.4 Controlling the Speed of a DC Motor
		Problem
		Solution
		Discussion
		See Also
	12.5 Controlling the Direction of a DC Motor
		Problem
		Solution
		Discussion
		See Also
	12.6 Using a Unipolar Stepper Motor
		Problem
		Solution
		Discussion
		See Also
	12.7 Using a Bipolar Stepper Motor
		Problem
		Solution
		Discussion
		See Also
	12.8 Using a Stepper Motor HAT to Drive a Bipolar Stepper Motor
		Problem
		Solution
		Discussion
		See Also
Chapter 13. Digital Inputs
	13.0 Introduction
	13.1 Connecting a Push Switch
		Problem
		Solution
		Discussion
		See Also
	13.2 Toggling with a Push Switch
		Problem
		Solution
		Discussion
		See Also
	13.3 Using a Two-Position Toggle or Slide Switch
		Problem
		Solution
		Discussion
		See Also
	13.4 Using a Center-Off Toggle or Slide Switch
		Problem
		Solution
		Discussion
		See Also
	13.5 Debouncing a Button Press
		Problem
		Solution
		Discussion
		See Also
	13.6 Using an External Pull-Up Resistor
		Problem
		Solution
		Discussion
		See Also
	13.7 Using a Rotary (Quadrature) Encoder
		Problem
		Solution
		Discussion
		See Also
	13.8 Using a Keypad
		Problem
		Solution
		Discussion
		See Also
	13.9 Detecting Movement
		Problem
		Solution
		Discussion
		See Also
	13.10 Adding GPS to the Raspberry Pi
		Problem
		Solution
		Discussion
		See Also
	13.11 Intercepting Keypresses
		Problem
		Solution
		Discussion
		See Also
	13.12 Intercepting Mouse Movements
		Problem
		Solution
		Discussion
		See Also
	13.13 Giving the Raspberry Pi a Reset Button
		Problem
		Solution
		Discussion
		See Also
Chapter 14. Sensors
	14.0 Introduction
	14.1 Using Resistive Sensors
		Problem
		Solution
		Discussion
		See Also
	14.2 Measuring Light
		Problem
		Solution
		Discussion
		See Also
	14.3 Measuring Temperature with a Thermistor
		Problem
		Solution
		Discussion
		See Also
	14.4 Detecting Methane
		Problem
		Solution
		Discussion
		See Also
	14.5 Measuring Air Quality (CO2)
		Problem
		Solution
		Discussion
		See Also
	14.6 Measuring Soil Moisture
		Problem
		Solution
		Discussion
		See Also
	14.7 Measuring a Voltage
		Problem
		Solution
		Discussion
		See Also
	14.8 Reducing Voltages for Measurement
		Problem
		Solution
		Discussion
		See Also
	14.9 Using Resistive Sensors with an ADC
		Problem
		Solution
		Discussion
		See Also
	14.10 Measuring Temperature with an ADC
		Problem
		Solution
		Discussion
		See Also
	14.11 Measuring the Raspberry Pi CPU Temperature
		Problem
		Solution
		Discussion
		See Also
	14.12 Measuring Temperature, Humidity, and Pressure with a Sense HAT
		Problem
		Solution
		Discussion
		See Also
	14.13 Measuring Temperature Using a Digital Sensor
		Problem
		Solution
		Discussion
		See Also
	14.14 Measuring Acceleration with an MMA8452Q Module
		Problem
		Solution
		Discussion
		See Also
	14.15 Finding Magnetic North with the Sense HAT
		Problem
		Solution
		Discussion
		See Also
	14.16 Using the Inertial Measurement Unit of the Sense HAT
		Problem
		Solution
		Discussion
		See Also
	14.17 Sensing a Magnet with a Reed Switch
		Problem
		Solution
		Discussion
		See Also
	14.18 Sensing a Magnet with the Sense HAT
		Problem
		Solution
		Discussion
		See Also
	14.19 Measuring Distance Using Ultrasound
		Problem
		Solution
		Discussion
		See Also
	14.20 Measuring Distance Using a Time-of-Flight Sensor
		Problem
		Solution
		Discussion
		See Also
	14.21 Adding Touch Sensing to Your Raspberry Pi
		Problem
		Solution
		Discussion
		See Also
	14.22 Reading Smart Cards with an RFID Reader/Writer
		Problem
		Solution
		Discussion
		See Also
	14.23 Displaying Sensor Values
		Problem
		Solution
		Discussion
		See Also
	14.24 Logging to a USB Flash Drive
		Problem
		Solution
		Discussion
		See Also
Chapter 15. Displays
	15.0 Introduction
	15.1 Using a Four-Digit LED Display
		Problem
		Solution
		Discussion
		See Also
	15.2 Displaying Graphics on an I2C LED Matrix
		Problem
		Solution
		Discussion
		See Also
	15.3 Using the Sense HAT LED Matrix Display
		Problem
		Solution
		Discussion
		See Also
	15.4 Using an OLED Graphical Display
		Problem
		Solution
		Discussion
		See Also
	15.5 Using Addressable RGB LED Strips
		Problem
		Solution
		Discussion
		See Also
	15.6 Using the Pimoroni Unicorn HAT
		Problem
		Solution
		Discussion
		See Also
	15.7 Using an ePaper Display
		Problem
		Solution
		Discussion
		See Also
Chapter 16. Sound
	16.0 Introduction
	16.1 Connecting a Loudspeaker
		Problem
		Solution
		Discussion
		See Also
	16.2 Controlling Where Sound Is Output
		Problem
		Solution
		Discussion
		See Also
	16.3 Playing Audio on a Raspberry Pi Without an Audio Socket
		Problem
		Solution
		Discussion
		See Also
	16.4 Playing Sound from the Command Line
		Problem
		Solution
		Discussion
		See Also
	16.5 Playing Sound from Python
		Problem
		Solution
		Discussion
		See Also
	16.6 Using a USB Microphone
		Problem
		Solution
		Discussion
		See Also
	16.7 Making a Buzzing Sound
		Problem
		Solution
		Discussion
		See Also
Chapter 17. The Internet of Things
	17.0 Introduction
	17.1 Controlling GPIO Outputs Using a Web Interface
		Problem
		Solution
		Discussion
		See Also
	17.2 Displaying Sensor Readings on a Web Page
		Problem
		Solution
		Discussion
		See Also
	17.3 Getting Started with Node-RED
		Problem
		Solution
		Discussion
		See Also
	17.4 Sending Email and Other Notifications with IFTTT
		Problem
		Solution
		Discussion
		See Also
	17.5 Sending Tweets Using ThingSpeak
		Problem
		Solution
		Discussion
		See Also
	17.6 Changing LED Color Using CheerLights
		Problem
		Solution
		Discussion
		See Also
	17.7 Sending Sensor Data to ThingSpeak
		Problem
		Solution
		Discussion
		See Also
	17.8 Responding to Tweets Using Dweet and IFTTT
		Problem
		Solution
		Discussion
		See Also
Chapter 18. Home Automation
	18.0 Introduction
	18.1 Making a Raspberry Pi into a Message Broker with Mosquitto
		Problem
		Solution
		Discussion
		See Also
	18.2 Using Node-RED with an MQTT Server
		Problem
		Solution
		Discussion
		See Also
	18.3 Flashing a Sonoff WiFi Smart Switch for MQTT Use
		Problem
		Solution
		Discussion
		See Also
	18.4 Configuring a Sonoff WiFi Smart Switch
		Problem
		Solution
		Discussion
		See Also
	18.5 Using Sonoff Web Switches with MQTT
		Problem
		Solution
		Discussion
		See Also
	18.6 Using Flashed Sonoff Switches with Node-RED
		Problem
		Solution
		Discussion
		See Also
	18.7 Turning Things On and Off Using the Node-RED Dashboard
		Problem
		Solution
		Discussion
		See Also
	18.8 Scheduling Events with Node-RED
		Problem
		Solution
		Discussion
		See Also
	18.9 Publishing MQTT Messages from a Wemos D1
		Problem
		Solution
		Discussion
		See Also
	18.10 Using a Wemos D1 with Node-RED
		Problem
		Solution
		Discussion
		See Also
Chapter 19. Raspberry Pi Pico and Pico W
	19.0 Introduction
	19.1 Connecting a Pico or Pico W to a Computer
		Problem
		Solution
		Discussion
		See Also
	19.2 Using the Python Shell on a Pico
		Problem
		Solution
		Discussion
		See Also
	19.3 Using a Pico with a Breadboard
		Problem
		Solution
		Discussion
		See Also
	19.4 Using Digital Outputs on a Pico
		Problem
		Solution
		Discussion
		See Also
	19.5 Using Digital Inputs on a Pico
		Problem
		Solution
		Discussion
		See Also
	19.6 Using Analog (PWM) Outputs on a Pico
		Problem
		Solution
		Discussion
		See Also
	19.7 Using Analog Inputs on a Pico
		Problem
		Solution
		Discussion
		See Also
	19.8 Controlling a Servomotor from a Pico
		Problem
		Solution
		Discussion
		See Also
	19.9 Using the Pico and Pico W’s Filesystem
		Problem
		Solution
		Discussion
		See Also
	19.10 Making Use of the Second Core
		Problem
		Solution
		Discussion
		See Also
	19.11 Running a WiFi Web Server on the Pico W
		Problem
		Solution
		Discussion
		See Also
	19.12 Using Pico-Compatible Boards
		Problem
		Solution
		Discussion
		See Also
	19.13 Using the Pico on Batteries
		Problem
		Solution
		Discussion
		See Also
Appendix A. Parts and Suppliers
	Parts
	Prototyping Equipment and Kits
	Resistors and Capacitors
	Transistors and Diodes
	Integrated Circuits
	OptoElectronics
	Modules
	Miscellaneous
Appendix B. Raspberry Pi Pinouts
	Raspberry Pi 400/4/3/2 Model B, B+, A+, Zero
	Raspberry Pi Model B revision 2, A
	Raspberry Pi Model B revision 1
	Raspberry Pi Pico
Index
About the Author