const int buttonPin = 2;                 
int eventCounter = 0;                    
bool stableButtonState = HIGH;           
bool lastReading = HIGH;                 
unsigned long lastDebounceTime = 0;      
const unsigned long debounceDelay = 50;  

void setup() {
  pinMode(buttonPin, INPUT_PULLUP);      
  Serial.begin(9600);                    
}

void loop() {
  unsigned long currentMillis = millis();  

  bool reading = digitalRead(buttonPin);

  if (reading != lastReading) {
    lastDebounceTime = currentMillis;
    lastReading = reading;
  }

  if (currentMillis - lastDebounceTime > debounceDelay) {
    if (reading != stableButtonState) {
      stableButtonState = reading;

      if (stableButtonState == LOW) {
        eventCounter++;

        unsigned long seconds = currentMillis / 1000;   
        Serial.print("Zdarzenie ");
        Serial.print(eventCounter);
        Serial.print(" o czasie ");
        Serial.print(seconds);
        Serial.println(" sekund.");
      }
    }
  }
 
}