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

#define ENCODER_CLK 4
#define ENCODER_DT  5

void setup() {
  Serial.begin(115200);
  pinMode(ENCODER_CLK, INPUT);
  pinMode(ENCODER_DT, INPUT);
  pinMode(2, OUTPUT);
  pinMode(3, OUTPUT);
}

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) {
      Serial.println("Rotated clockwise ⏩");
    digitalWrite(2, LOW);
    digitalWrite(3, HIGH);
    }
    if (newClk == LOW && dtValue == LOW) {
      Serial.println("Rotated counterclockwise ⏪");
      digitalWrite(2, HIGH);
      digitalWrite(3, LOW);
    }
  }
}