const int pushButtonPin = 26; // Pin number where the push button is connected
bool buttonState = HIGH; // Variable to store the current state of the push button
bool lastButtonState = HIGH; // Variable to store the previous state of the push button
unsigned long lastDebounceTime = 0; // Variable for debounce delay
unsigned long debounceDelay = 50; // Debounce time in milliseconds


void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  pinMode(pushButtonPin, INPUT_PULLUP);
}

void loop() {
  // put your main code here, to run repeatedly:
   int reading = digitalRead(pushButtonPin); // Read the state of the push button
  //Serial.println(reading);
  // Check if the button state has changed and debounce the button
  if (reading != lastButtonState) {
    lastDebounceTime = millis();
  }

  // Generate OTP if the button state has been stable for the debounce delay
  if ((millis() - lastDebounceTime) > debounceDelay) {
    // Check if the button state is LOW (pressed)
    if (reading == LOW) {
      // Generate and print a 6-digit random OTP
      int otpLength = 6; // You can change the OTP length as per your requirement
      String otp = generateOTP(otpLength);
      Serial.println("Generated OTP: " + otp);
    }
  }

  // Update the last button state
  lastButtonState = reading;
}
String generateOTP(int length) {
  String otp = "";
  for (int i = 0; i < length; ++i) {
    otp += String(random(1, 10)); // Generates random digits from 0 to 9
  }
  return otp;
}