Drawer Lock

//2020 Ali_Kilicoglu



#include <Servo.h>
Servo servoNesnesi;

#include <Keypad.h>
String pasword1="Your password";
String pasword2="";
int p=0;


const byte ROWS = 4; //four rows
const byte COLS = 3; //three columns

char keys[ROWS][COLS] = {
  {'1','2','3'},
  {'4','5','6'},
  {'7','8','9'},
  {'*','0','#'}
};
byte rowPins[ROWS] = {9, 8, 7, 6}; //connect to the row pinouts of the keypad
byte colPins[COLS] = {5, 4, 3}; //connect to the column pinouts of the keypad

//Create an object of keypad
Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );

void setup(){
  Serial.begin(9600);
  #define BUZZERPIN 11
  
  servoNesnesi.attach(10);
  pinMode(BUZZERPIN,OUTPUT);

  servoNesnesi.write(100);//first lock drawer

  Serial.begin(9600); 

}





  
void loop(){
    char key = keypad.getKey();// Read the key
  
  // Print if key pressed
  if (key){

    Serial.print("Key print : ");
    Serial.println(key);

    digitalWrite(BUZZERPIN,HIGH);
    delay(100);
    digitalWrite(BUZZERPIN,LOW);
    p = pasword2.length();
    pasword2+= key;
    Serial.println(pasword2);
  }
  if(pasword2 == pasword1){//if your pasword equal keypad pasword
      servoNesnesi.write(20);//open the drawer
      pasword2="";

  }
  else if(pasword2 !=pasword1 and p>= 6){

      digitalWrite(BUZZERPIN,HIGH);
      pasword2="";

   }
   if(key == '#'){//for lock the drawer
     servoNesnesi.write(100);
     pasword2="";

    
    }

  }