int CLK=2;
int DT=3;
void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  pinMode(CLK, INPUT);
  pinMode(DT, INPUT);

}
int last=HIGH;
void loop() {
  // put your main code here, to run repeatedly:
  int CLKvalue = digitalRead(CLK);
  if(CLKvalue!=last)
    last=CLKvalue;
    int DTvalue=digitalRead(DT);
    if(CLKvalue==LOW && DTvalue==HIGH)
    {
      Serial.println("Rotate Clockwise");
    }
    if(CLKvalue==HIGH && DTvalue==LOW)
    {
      Serial.println("Rotate Anti Clockwise");
    }
}