// KY-040 Rotary Encoder Example
// Taken from: https://docs.wokwi.com/parts/wokwi-ky-040
// Copyright (C) 2021, Uri Shaked
#include <Servo.h>
Servo servo;
#define ENCODER_CLK 2
#define ENCODER_DT  3

int angle=90;

void setup() {
  Serial.begin(115200);
  pinMode(ENCODER_CLK, INPUT);
  pinMode(ENCODER_DT, INPUT);
  servo.attach(10);  
}

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 ⏩");
      angle+=10;
    }
    if (newClk == LOW && dtValue == LOW) {
      Serial.println("Rotated counterclockwise ⏪");
      angle-=10;
    }
    if(angle>=180){
      angle=180;
    }
    if(angle<=0)
    {
      angle=0;
    }
    servo.write(angle);
  }
}