“What Could Go Wrong? I2C Edition” from 7/19/16 by Elliot Williams:
https://hackaday.com/2016/07/19/what-could-go-wrong-i2c-edition/
“Taking the Leap Off Board: An Introduction to I2C Over Long Wires” from 2/8/17 by Joshua Vasquez:
https://hackaday.com/2017/02/08/taking-the-leap-off-board-an-introduction-to-i2c-over-long-wires/