It’s now with gray-coded encoders support on board. Sample config is included in package. Encoder’s common must be connected to the GND pin while A & B channels to successive digital pins (in example config – pins 6 and 7). Put first of two pins in configuration and never use other pin for any other inputs/outputs (anyway it’s not available physicaly).
If you start with this version you still need to read installation manual here
Feedback is always highly appreciated.