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 ...