For the AS5600, it communicates over I2C, so you would use the Wire library in Arduino to communicate with it. Here's a revised explanation: These are magnetic rotary encoders that can be used to ...
AS5600 is a library for an AS5600 / AS5600L based magnetic rotation meter. More exact, it measures the angle (rotation w.r.t. reference) and not RPM. Multiple angle measurements allows one to ...