volatile int encoderPosition = 0;

int clkPin = 3;
int dtPin = 5;

void setup() {
  Serial.begin(115200);
  pinMode(clkPin, INPUT);
  pinMode(dtPin, INPUT);

  attachInterrupt(digitalPinToInterrupt(clkPin), updatePosition, FALLING);
}

void loop() {
  Serial.print("Encoder position is: ");
  Serial.println(encoderPosition);
  delay(100);
}

void updatePosition() {
    // Read the state of pin B to determine direction
    int dtPinState = digitalRead(dtPin);
    if (dtPinState == HIGH) {
        encoderPosition += 1;  // Clockwise
    } else {
        encoderPosition -= 1;  // Counter-clockwise
    }
}