crank-that.ino

#include <Mouse.h>


#define enc_dt 2
#define enc_clk 3


int responseDelay = 2;        // response delay of the mouse, in ms

void setup() {

  Mouse.begin();
  
  pinMode(enc_dt, INPUT_PULLUP);
  pinMode(enc_clk, INPUT_PULLUP);
  pinMode(button, INPUT);
  
  attachInterrupt(digitalPinToInterrupt(enc_clk), onTurn, FALLING);
  
}

void loop() {

}

void onTurn() {
  if (digitalRead(enc_clk) == digitalRead(enc_dt)) {
    Mouse.move(0, 0, -1);  // Scroll mouse up (I think, its one of those)
  } else {
    Mouse.move(0, 0, 1);  // Scroll mouse down (the other direction)
  }
}