A common I2C EEPROM – you likely have a good few such chips within a dozen meter radius. By [Raimond Spekking], CC BY-SA 4.0 I2C is a two-wire interface, and you can put multiple devices on ...
Because of that, I 2 C tutorials are always welcome, and this new tutorial by [Embedds] does an excellent job of how to use I 2 C with an AVR with a 24C16 2Kbyte EEPROM. The first half of the ...