// KY-040 Rotary Encoder Example
// Taken from: https://docs.wokwi.com/parts/wokwi-ky-040
// Copyright (C) 2021, Uri Shaked
#include <Stepper.h>

const int stepsPerRevolution = 20;  // change this to fit the number of steps per revolution
// for your motor

// initialize the stepper library on pins 8 through 11:
Stepper myStepper(stepsPerRevolution, 8, 9, 10, 11);

#define ENCODER_CLK 2
#define ENCODER_DT  3

void setup() {
  Serial.begin(115200);
  // set the speed at 60 rpm:
  myStepper.setSpeed(300);
  pinMode(ENCODER_CLK, INPUT);
  pinMode(ENCODER_DT, INPUT);
}

int lastClk = HIGH;

void loop() {
  int newClk = digitalRead(ENCODER_CLK);
  if (newClk != lastClk) {
    // There was a change on the CLK pin
    lastClk = newClk;
    int dtValue = digitalRead(ENCODER_DT);
    if (newClk == LOW && dtValue == HIGH) {
      myStepper.step(stepsPerRevolution);
      Serial.println("Rotated clockwise ⏩");
    }
    if (newClk == LOW && dtValue == LOW) {
      myStepper.step(-stepsPerRevolution);
      Serial.println("Rotated counterclockwise ⏪");
    }
  }
}

/*
  // step one revolution  in one direction:
  Serial.println("clockwise");
  myStepper.step(stepsPerRevolution);
  delay(500);

  // step one revolution in the other direction:
  Serial.println("counterclockwise");
  myStepper.step(-stepsPerRevolution);
  delay(500);
  */