book

Exploring Arduino, 2nd Edition

by Jeremy Blum

November 2019

Beginner

512 pages

11h 50m

English

Wiley

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Why Arduino?Who This Book Is ForWhat You'll Learn in This BookFeatures Used in This BookGetting the PartsWhat You'll NeedSource Code and Digital ContentErrataSupplementary Material and SupportWhat Is an Arduino?An Open Source PlatformBeyond This Book
Exploring the Arduino EcosystemCreating Your First ProgramSummary
Digital OutputsPulse-Width Modulation with analogWrite() Reading Digital InputsBuilding a Controllable RGB LED NightlightSummary
Understanding Analog and Digital SignalsReading Analog Sensors with the Arduino: analogRead() Using Variable Resistors to Make Your Own Analog SensorsSummary
Driving DC MotorsBuilding a Roving RobotSummary
Driving Servo MotorsBuilding a Sweeping Distance SensorUnderstanding and Driving Stepper MotorsBuilding a “One-Minute Chronograph”Summary
Understanding How Speakers WorkUsing tone() to Make SoundsBuilding a Micro PianoSummary

Understanding the Arduino's Serial Communication CapabilitiesListening to the ArduinoTalking to the ArduinoTalking to a Desktop AppSummary
Emulating a KeyboardEmulating a MouseSummary
Understanding Shift RegistersControlling Light Animations with a Shift RegisterSummary
History of the I2C BusI2C Hardware DesignCommunicating with an I2C Temperature ProbeCombining Shift Registers, Serial Communication, and I2C CommunicationsSummary
Overview of the SPI BusSPI Hardware and Communication DesignComparing SPI to I2C and UARTCommunicating with an SPI AccelerometerCreating an Audiovisual Instrument Using a 3-Axis AccelerometerSummary
Setting Up the LCDUsing the LiquidCrystal Library to Write to the LCDBuilding a Personal ThermostatSummary
Using Hardware InterruptsUsing Timer InterruptsBuilding an Interrupt-Driven Sound MachineSummary
Getting Ready for Data LoggingInterfacing the Arduino with an SD CardReal-Time ClocksBuilding an Entrance LoggerSummary
The Electromagnetic SpectrumReceiving Key Presses with the RF LinkMaking a Wireless DoorbellThe Start of Your Smart Home—Controlling a LampSummary
Demystifying BluetoothCommunication between Your Arduino and Your PhoneControlling an AC Lamp with BluetoothSummary
The Web, the Arduino, and YouControlling Your Arduino from the WebInterfacing with Web APIsSummary
Reading DatasheetsUnderstanding the Arduino Schematic
About the Technical Editor

Content preview from Exploring Arduino, 2nd Edition

16Bluetooth Connectivity

Parts You'll Need for This Chapter
Adafruit Feather 32u4 Bluefruit LE (pre-soldered)
USB cable (Type A to Micro-B)
Half-size or full-size breadboard
Assorted jumper wires
220Ω resistor
10kΩ trim potentiometer (or another analog sensor of your choice)
5 mm red LED
5V 1A USB port wall power supply
Controllable power relay module (IoT Power Relay from Digital Loggers, Inc.)
AC lamp
Pocket screwdriver
BTLE-capable smartphone (iPhone or Android)
- CODE AND DIGITAL CONTENT FOR THIS CHAPTER
- Code downloads, videos, and other digital content for this chapter can be found at:
- exploringarduino.com/content2/ch16
- Code for this chapter can also be obtained from the Downloads tab on this book's Wiley web page:
- wiley.com/go/exploringarduino2e

It probably didn't take long for you to grow bored of using simple RF communications to send a single bit of information to your Arduino wirelessly. As you know from using your laptop, smartphone, or IoT (Internet-of-Things) devices, it's possible to do a lot more with the right type of wireless technology. In this chapter, you'll learn about Bluetooth technology, one of the world's most popular wireless standards. Variants of Bluetooth technology are used in headsets, keyboards, mice, computers, smartphones, location beacons, and more.

Demystifying Bluetooth

“Bluetooth” has become an overloaded term that is often (incorrectly) used to describe any short-range, point-to-point wireless communication. Bluetooth, by design, is actually ...