#include <ESP32Servo.h>

Servo myServo;
const int servoPin = 13;
const int buttonPin = 14;
const int systemLed = 25;
const int correctLed = 26;
const int wrongLed = 27;

String correctPassword = "1234";
String enteredPassword = "";

void setup() {
  Serial.begin(9600);

  pinMode(buttonPin, INPUT_PULLUP);
  pinMode(systemLed, OUTPUT);
  pinMode(correctLed, OUTPUT);
  pinMode(wrongLed, OUTPUT);
  myServo.attach(servoPin);
  myServo.write(0);  
}

void loop() {

  if (digitalRead(buttonPin) == LOW) {   
    digitalWrite(systemLed, HIGH);       
    Serial.println("System ON - Enter Password");
    if (Serial.available()) {
      char c = Serial.read();
      if (c == '\n') {   
        if (enteredPassword == correctPassword) {
          Serial.println("Access Granted");
          digitalWrite(correctLed, HIGH);
          digitalWrite(wrongLed, LOW);

          myServo.write(90);   
          delay(10000);
          myServo.write(0);     

          digitalWrite(correctLed, LOW);
        }
        else {
          Serial.println("Wrong Password");
          digitalWrite(wrongLed, HIGH);
          digitalWrite(correctLed, LOW);
          delay(2000);
          digitalWrite(wrongLed, LOW);
        }
        enteredPassword = "";   
        Serial.println("Enter Password:");
      }
      else if (c != '\r') {
        enteredPassword += c;  
      }
    }
  } 
  else {   
    digitalWrite(systemLed, LOW);
  }
}