The digital pins used in these diagrams provide a working guide ... hardware\avr\1.8.6\variants\standard\pins_arduino.h In the ~\leonardo\pins_arduino.h file for instance, digital pin 9 (D9) maps to ...

Right now you can only reprogram the Knobo’s Arduino-based firmware with an In-Circuit Serial Programmer to change what the inputs do, but [Gary] is currently working on configuration software ...

That includes other pin-change interrupts ... This library has been tested with an Arduino Uno (AtMega328p), EnviroDIY Mayfly (AtMega1284p), Adafruit Feather 32u4 (AtMega32u4, identical to Arduino ...