11
The SPI Bus and Third-Party Libraries

Parts You'll Need for This Chapter

• Arduino Uno or Adafruit METRO 328
• USB cable (Type A to B for Uno, Type A to Micro-B for METRO)
• Half-size or full-size breadboard
• Assorted jumper wires
• 220Ω resistors (×4)
• 5mm common-anode RGB LED
• Piezo buzzer
• Adafruit LIS3DH breakout board
  • CODE AND DIGITAL CONTENT FOR THIS CHAPTER
  • Code downloads, videos, and other digital content for this chapter can be found at:
  • exploringarduino.com/content2/ch11
  • Code for this chapter can also be obtained from the Downloads tab on this book's Wiley web page:
  • wiley.com/go/exploringarduino2e

You've already learned about two important digital communication methods that are available to you on the Arduino: the I²C bus and the serial UART bus. In this chapter, you will learn about a third digital communication method supported by the Arduino hardware: the Serial Peripheral Interface bus, or SPI (often pronounced “spy”) bus for short.

Unlike...