[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 ...

The 4 channel smart relay board ... a series of I2c and standard component pins, you can add a little extra control to the board that is all programmed using the classic Arduino IDE.

ESP8266 based Wi-Fi and I2C bus for sensors or expansions. “ For a complete list of all available pledges, stretch goals, extra media and specifications for the Arduino development board ...