I almost forgot about the holocrons! When you place a Jedi holocron next to a Sith holocron, they unlock a message. These holocrons communicate to each other via Infrared sensors, so I hooked up my own infrared sensor to an Arduino and listened in.
Whenever there’s a kyber in an activated Jedi holocron, it sends out a message out to the Sith holocron. The message stays the same regardless of what color kyber is inside of it.