Door lock Arduino code
د.ك0.000
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#include
#include
#include
#include
#define buzzer 11
Servo servo;
LiquidCrystal_I2C lcd(0x27, 16, 2);
String newPasswordString; //hold the new password
char newPassword[6]; //charater string of newPasswordString
byte a = 5;
bool value = true;
Password password = Password("1234"); //Enter your password
byte maxPasswordLength = 6;
byte currentPasswordLength = 0;
const byte ROWS = 4; // Four rows
const byte COLS = 4; // Four columns
char keys[ROWS][COLS] = {
{'D', 'C', 'B', 'A'},
{'#', '9', '6', '3'},
{'0', '8', '5', '2'},
{'*', '7', '4', '1'},
};
byte rowPins[ROWS] = {2, 3, 4, 5};
byte colPins[COLS] = {6, 7, 8, 9};
Keypad keypad = Keypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS );
void setup() {
Serial.begin(9600);
pinMode(buzzer, OUTPUT);
servo.attach(10);
servo.write(220);
lcd.init();
lcd.backlight();
lcd.setCursor(3, 0);
lcd.print("WELCOME TO");
lcd.setCursor(0, 1);
lcd.print("DOOR LOCK SYSTEM");
delay(3000);
lcd.clear();
}
void loop() {
lcd.setCursor(1, 0);
lcd.print("ENTER PASSWORD");
char key = keypad.getKey();
if (key != NO_KEY) {
delay(60);
if (key == 'C') {
resetPassword();
} else if (key == 'D') {
if (value == true) {
doorlocked();
value = false;
} else if (value == false) {
dooropen();
value = true;
}
} else {
processNumberKey(key);
}
}
}
void processNumberKey(char key) {
lcd.setCursor(a, 1);
lcd.print("*");
a++;
if (a == 11) {
a = 5;
}
currentPasswordLength++;
password.append(key);
if (currentPasswordLength == maxPasswordLength) {
doorlocked();
dooropen();
}
}
void dooropen() {
if (password.evaluate()) {
digitalWrite(buzzer, HIGH);
delay(300);
digitalWrite(buzzer, LOW);
servo.write(180);
delay(100);
lcd.setCursor(0, 0);
lcd.print("CORRECT PASSWORD");
lcd.setCursor(0, 1);
lcd.print("DOOR OPENED");
delay(2000);
lcd.clear();
a = 5;
} else {
digitalWrite(buzzer, HIGH);
delay(200);
digitalWrite(buzzer, LOW);
delay(200);
digitalWrite(buzzer, HIGH);
delay(200);
digitalWrite(buzzer, LOW);
delay(200);
digitalWrite(buzzer, HIGH);
delay(200);
digitalWrite(buzzer, LOW);
delay(200);
lcd.setCursor(0, 0);
lcd.print("WRONG PASSWORD!");
lcd.setCursor(0, 1);
lcd.print("PLEASE TRY AGAIN");
delay(2000);
lcd.clear();
a = 5;
}
resetPassword();
}
void resetPassword() {
password.reset();
currentPasswordLength = 0;
lcd.clear();
a = 5;
}
void doorlocked() {
if (password.evaluate()) {
digitalWrite(buzzer, HIGH);
delay(300);
digitalWrite(buzzer, LOW);
servo.write(50);
delay(100);
lcd.setCursor(0, 0);
lcd.print("CORRECT PASSWORD");
lcd.setCursor(2, 1);
lcd.print("DOOR LOCKED");
delay(2000);
lcd.clear();
a = 5;
} else {
digitalWrite(buzzer, HIGH);
delay(200);
digitalWrite(buzzer, LOW);
delay(200);
digitalWrite(buzzer, HIGH);
delay(200);
digitalWrite(buzzer, LOW);
delay(200);
digitalWrite(buzzer, HIGH);
delay(200);
digitalWrite(buzzer, LOW);
delay(200);
digitalWrite(buzzer, HIGH);
delay(200);
digitalWrite(buzzer, LOW);
delay(200);
lcd.setCursor(0, 0);
lcd.print("WRONG PASSWORD!");
lcd.setCursor(0, 1);
lcd.print("PLEASE TRY AGAIN");
delay(2000);
lcd.clear();
a = 5;
}
resetPassword();
}
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