const int buttonPin = 2; // Interrupt pin for button
volatile int risingEdges = 0;
volatile int fallingEdges = 0;
volatile unsigned long lastInterruptTime = 0; // Time of last interrupt
const unsigned long debounceDelay = 50; // Debounce delay in milliseconds

void countEdges() {
    unsigned long currentTime = millis();
    
    // Software debounce check
    if (currentTime - lastInterruptTime > debounceDelay) {
        if (digitalRead(buttonPin) == HIGH) {
            risingEdges++;
        } else {
            fallingEdges++;
        }
        lastInterruptTime = currentTime;
    }
}

void setup() {
    Serial.begin(9600);
    pinMode(buttonPin, INPUT_PULLUP); // Use internal pull-up resistor
    
    // Attach interrupt to detect both RISING and FALLING edges
    attachInterrupt(digitalPinToInterrupt(buttonPin), countEdges, CHANGE);
}

void loop() {
    Serial.print("Rising Edges: ");
    Serial.print(risingEdges);
    Serial.print(" | Falling Edges: ");
    Serial.println(fallingEdges);
    
    delay(500); // Print every 500ms
}