const int buttonPin = 2;  // Pin number where your button is connected
const int ledPin = 13;    // Pin number where your LED is connected

// Variables
int buttonState = HIGH;         // Current state of the button (HIGH or LOW)
int lastButtonState = HIGH;     // Previous state of the button
boolean longPressDetected = false;  // Flag to track long press detection
unsigned long longPressStartTime = 0;  // Time when the button was pressed (milliseconds)
unsigned long longPressDuration = 2000;  // Define the long-press duration in milliseconds
unsigned long debounceDelay = 200;  // Delay to ignore subsequent changes (milliseconds)

void setup() {
  pinMode(buttonPin, INPUT);
  pinMode(ledPin, OUTPUT);
  Serial.begin(9600);
}

void loop() {
  int reading = digitalRead(buttonPin);

  // Check if the button state has changed
  if (reading != lastButtonState) {
    lastButtonState = reading;

    // Button pressed
    if (reading == LOW) {
      longPressStartTime = millis();  // Record the start time of button press
      delay(debounceDelay);           // Delay to ignore subsequent changes
      longPressDetected = false;      // Reset the long-press detection flag
    }
  } else {
    // Button released
    if (reading == HIGH) {
      // Check for long-press condition
      if (millis() - longPressStartTime > longPressDuration) {
        if (!longPressDetected) {
          // Perform actions for long press (e.g., turn on the LED)
          digitalWrite(ledPin, HIGH);

          Serial.print("Long press duration: ");
          Serial.println(millis() - longPressStartTime);
          
          longPressDetected = true;  // Set the flag to avoid continuous processing
        }
      }
    }
  }

  // Update the LED state based on the long-press detection
  digitalWrite(ledPin, longPressDetected ? HIGH : LOW);
}