Introduction

Picking Your Beagle

Getting Started, Out of the Box

Verifying You Have the Latest Version of the OS on Your Bone

Running the Python and JavaScript Examples

Cloning the Cookbook Repository

Wiring a Breadboard

Editing Code Using Visual Studio Code

Running Python and JavaScript Applications from Visual Studio Code

Finding the Latest Version of the OS for Your Bone

Running the Latest Version of the OS on Your Bone

Updating the OS on Your Bone

Backing Up the Onboard Flash

Updating the Onboard Flash

Introduction

Choosing a Method to Connect Your Sensor

Input and Run a Python or JavaScript Application for Talking

Reading the Status of a Pushbutton or Magnetic Switch (Passive

Mapping Header Numbers to gpio Numbers

Reading a Position, Light, or Force Sensor (Variable

Reading a Distance Sensor (Analog or Variable Voltage Sensor)

Accurately Reading the Position of a Motor or Dial

Measuring a Temperature

Reading Temperature via a Dallas 1-Wire Device

Playing and Recording Audio

Introduction

Toggling an Onboard LED

Toggling an External LED

Toggling an External LED via gpiod

Toggling a High-Voltage External Device

Fading an External LED

Writing to an LED Matrix

Driving a 5 V Device

Writing to a NeoPixel LED String Using the PRUs

Introduction

Controlling a Servo Motor

Controlling a Servo with an Rotary Encoder

Controlling the Speed of a DC Motor

Controlling the Speed and Direction of a DC Motor

Driving a Bipolar Stepper Motor

Driving a Unipolar Stepper Motor

Introduction

Running Your Bone Standalone

Getting to the Command Shell via SSH

Getting to the Command Shell via the Virtual Serial Port

Viewing and Debugging the Kernel and u-boot Messages at Boot Time

Verifying You Have the Latest Version of the OS on Your Bone from the Shell

Controlling the Bone Remotely with a VNC

Learning Typical GNU/Linux Commands

Editing a Text File from the GNU/Linux Command Shell

Establishing an Ethernet-Based Internet Connection

Establishing a WiFi-Based Internet Connection

Sharing the Host’s Internet Connection over USB

Setting Up a Firewall

Installing Additional Packages from the Debian Package Feed

Removing Packages Installed with apt

Copying Files Between the Onboard Flash and the MicroSD Card

Freeing Space on the Onboard Flash or MicroSD Card

Using C to Interact with the Physical World

Introduction

Accessing Your Host Computer’s Files on the Bone

Serving Web Pages from the Bone

Interacting with the Bone via a Web Browser

Displaying GPIO Status in a Web Browser - reading a button

Controlling GPIOs

Plotting Data

Sending an Email

Displaying the Current Weather Conditions

Sending and Receiving Tweets

Wiring the IoT with Node-RED

Introduction

Updating the Kernel

Building and Installing Kernel Modules

Controlling LEDs by Using SYSFS Entries

Controlling GPIOs by Using SYSFS Entries

Compiling the Kernel

Using the Installed Cross Compiler

Applying Patches

Creating Your Own Patch File

Introduction

I/O with Python

I/O with C

I/O with devmem2

I/O with C and mmap()

Tighter Delay Bounds with the PREEMPT_RT Kernel

Introduction

Using a Seven-Inch LCD Cape

Using a 128 x 128-Pixel LCD Cape

Connecting Multiple Capes

Moving from a Breadboard to a Protoboard

Creating a Prototype Schematic

Verifying Your Cape Design

Laying Out Your Cape PCB

Migrating a Fritzing Schematic to Another Tool

Producing a Prototype

Creating Contents for Your Cape Configuration EEPROM

Putting Your Cape Design into Production