If you are looking for the Chapter 10 content for the 1st Edition of Exploring Arduino, please click here.

The I2C Bus

Parts List

• 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 (×8)
• 4.7kΩ resistors (×2)
• 5mm red LED
• 5mm green LEDs (×4)
• 5mm yellow LEDs (×3)
• SN74HC595N shift register
• TC74A0-5.0VAT I²C temperature sensor

Code

Download Code (2nd Edition, Chapter 10)
(Also available on GitHub)

Useful Links

• Arduino Wire Library Reference
• Temperature Conversion Formulas
• 74HC595 Shift Register Datasheet (PDF)
• TC74 Datasheet (PDF)
• Processing loadFont() Reference
• Processing textFont() Reference
• Processing fill() Reference
• Processing text() Reference

Videos

This video will teach you about the I²C Bus:

Watch a demo video of the “Temperature Monitor” project from this chapter: