const int buttonPin = 27;  // Pin27 assigned for Input
const int ledPin = 0;  // Pin0 assigned for LED Blink
int buttonState = 0;
unsigned long startTime = 0;
float elapsedTime = 0.00;

void setup() {       // put your setup code here, to run once:
  Serial.begin(115200);     // Transmission Speed set as 115200 bps
  pinMode(buttonPin, INPUT);
  pinMode(ledPin, OUTPUT);
}

void loop() {        // put your main code here, to run repeatedly:
    buttonState = digitalRead(buttonPin);

  if (buttonState == HIGH && startTime == 0){
    digitalWrite(ledPin, HIGH);
    startTime = millis();
    Serial.println("Button pressed");
  }
  if (buttonState == LOW && startTime != 0) {
    elapsedTime = (millis() - startTime) / 1000.0;
    Serial.print("Button released. Elapsed time: ");
    Serial.print(elapsedTime, 2);
    Serial.println(" seconds");
    startTime = 0;  
    digitalWrite(ledPin, LOW);
  }
  delay(10);  
}