#include <Keypad.h>
#include <ESP32Servo.h>
Servo servo1;
int servoPosition;
//String lockStatus = "locked";
String code;
String pswd = "1596";

String pressedKey;
char keyMap[4][4] = {
  {'1','2','3', 'A'},
  {'4','5','6', 'B'},
  {'7','8','9', 'C'},
  {'*','0','#', 'D'}
};

byte rowPins[4] = {14, 27, 26, 25};
byte columnPins[4] = {33, 32, 18, 19};
 
Keypad keypad = Keypad(makeKeymap(keyMap), rowPins, columnPins, 4, 4 );
 
void setup(){
  Serial.begin(115200);
  servo1.attach(17);
}
 
void loop(){
  
pressedKey = keypad.getKey();
if (pressedKey) {
  code = code + pressedKey;
  Serial.println(code);
}

//user unlock
if (code == String("1596A")) {
  servo1.write(180);
  Serial.println("Unlocked");
  code = "";
}

//first method of checking if the variable contains something, in this case #
if (code.indexOf('#') != -1){
  Serial.println("Code reset");
  code = "";
  servo1.write(90);
}

//second method of checking if the variable contains something, in this case *
if (pressedKey == String("*")) {
  Serial.println("Code reset");
  code = "";
  servo1.write(90);
}

//admin unlock
if (code == pswd) {
  servo1.write(180);
  Serial.println("Unlocked");
  code = "";
}

}