#include <ESP32Servo.h>
#include<LiquidCrystal_I2C.h>
#define servo_pin 18


Servo myservo;

LiquidCrystal_I2C lcd(0x27, 16, 2);

int count = 0;
char c;
String id;

int pos = 0;

void setup() {
  Serial.begin(9600);
  pinMode(14, OUTPUT);
  pinMode(2, INPUT);
 myservo.attach(servo_pin);
 myservo.write(0);


lcd.init();        
lcd.backlight();     
lcd.print("Hello, ESP32!"); 



/*for (pos = 0; pos <= 90; pos += 1)
          {     
            myservo.write(pos);              // tell servo to go to position in variable 'pos'
            delay(30);                       // waits 15ms for the servo to reach the position
          }
          //myservo.write(90);*/






}

void loop() {
  bool access_requested = true;

  if(digitalRead(2))
  {
   
    lcd.print("Please scan your RFID TAG"); 
    
  while(Serial.available()>0)
  {
    c = Serial.read();
   count++;
   id += c;
   if(count == 12)  
    {
      Serial.print(id);
      //break;
     
      if(id=="AB123456789A")
      {
        Serial.println("Valid TAG");
        digitalWrite(14, HIGH);
         for (pos = 0; pos <= 90; pos += 1)
          {     
            myservo.write(pos);             
            delay(15);                     
          }
          
          
          delay(5000);

          digitalWrite(14, LOW);
         for (pos = 90; pos >= 0; pos -= 1)
          {     
            myservo.write(pos);             
            delay(15);                      
          }
         


      }
      else
      {
      digitalWrite(14, LOW);
      Serial.println("Invalid TAG");
      }
    }
  }
  count = 0;
  id="";
  delay(500);

}
  
}