#include <Arduino.h>

// Define the pins for the rotary encoder
const int CLK_PIN = 2; // Connect CLK to D2
const int DT_PIN = 3;  // Connect DT to D3

// Variables to keep track of the encoder state
int lastStateCLK = LOW;
int counter = 0;

void setup() {
  // Initialize the pins as inputs
  pinMode(CLK_PIN, INPUT);
  pinMode(DT_PIN, INPUT);

  // Enable internal pull-up resistors
  digitalWrite(CLK_PIN, HIGH);
  digitalWrite(DT_PIN, HIGH);

  // Start the serial communication
  Serial.begin(9600);
}

void loop() {
  // Read the current state of the CLK pin
  int currentStateCLK = digitalRead(CLK_PIN);

  // Check for a change in the CLK pin
  if (currentStateCLK != lastStateCLK) {
    // If the DT pin is different from the CLK pin, it's a clockwise rotation
    if (digitalRead(DT_PIN) != currentStateCLK) {
      counter++;
    } else {
      // It's a counterclockwise rotation
      counter--;
    }
    // Print the current counter value
    Serial.println("Counter: " + String(counter));
  }

  // Update the last state of the CLK pin
  lastStateCLK = currentStateCLK;
}