Hitachi’s HD44780 based 16×2 character LCD are very cheap and widely available, and is an essential part for any project that displays information. Using the LCD backpack, desired data can be ...

A swappable Arduino-programmable ATMega32U4 Pro Micro (clone) powers it, and the board provides GPIO/I2C breakout pins for unlimited tinkering and customization.

[Johngineer] found himself in need of an I2C sniffer, but didn’t have one available. Necessity is the mother of invention, so he put together this I2C sniffer sketch for Arduino. The arduino … ...