#include <Arduino.h>

const int buttonPin = 21; // Pin where the button is connected
volatile int pressCount = 0; // Count of button presses
unsigned long lastPressTime = 0; // Time of the last button press
const unsigned long debounceDelay = 50; // Debounce time in milliseconds
const unsigned long pressDelay = 400; // Time to detect multiple presses

void setup() {
    pinMode(buttonPin, INPUT_PULLUP); // Set button pin as input with pull-up resistor
    attachInterrupt(digitalPinToInterrupt(buttonPin), buttonPressed, FALLING); // Interrupt on button press
    Serial.begin(9600); // Start serial communication
}

void loop() {
    static unsigned long lastCheckTime = 0;
    unsigned long currentTime = millis();

    // Check for multiple presses based on delay
    if (currentTime - lastCheckTime > pressDelay) {
        lastCheckTime = currentTime;
        
        // Output based on the number of presses detected
        if (pressCount == 1) {
            Serial.println("Single Press Detected");
        } else if (pressCount == 2) {
            Serial.println("Double Press Detected");
        } else if (pressCount >= 3) {
            Serial.println("Triple Press Detected");
        }

        pressCount = 0; // Reset count after processing
    }
}

void buttonPressed() {
    unsigned long currentTime = millis(); // Get current time

    // Check for debounce
    if (currentTime - lastPressTime > debounceDelay) {
        lastPressTime = currentTime; // Update last press time
        pressCount++; // Increment press count
    }
}