security system

[johnmwashwaa]

can i get codes for the following components Arduino uno, keypad 4x3, servo motor, LCD display
if i can get it there must the following instructions
1.keypad 4x3
-password is 19887,by pressing "#" THE door closses
2.servo motor
-opens at 90 degrees
-closes after 10 seconds
3.lcd display
-when pressing the digits it should show" *"sign
-when pressed wrong digits it should show"wrong password"

[ssuksophon]

AIS_Receipt_10082025_074822.pdf

[Geronatsios]

Yes. Below is a full Arduino Uno sketch for:

4x3 keypad
servo motor
16x2 LCD display
password: 19887
pressing # closes the door
servo opens to 90°
door closes automatically after 10 seconds
LCD shows * while typing
wrong password shows Wrong password
Arduino code

`#include <Keypad.h>
#include <LiquidCrystal.h>
#include <Servo.h>

// -------------------- LCD pins --------------------
// RS, E, D4, D5, D6, D7
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

// -------------------- Servo --------------------
Servo doorServo;
const int servoPin = 10;

const int closedAngle = 0;
const int openAngle = 90;

// -------------------- Keypad 4x3 --------------------
const byte ROWS = 4;
const byte COLS = 3;

char keys[ROWS][COLS] = {
{'1', '2', '3'},
{'4', '5', '6'},
{'7', '8', '9'},
{'*', '0', '#'}
};

byte rowPins[ROWS] = {A0, A1, A2, A3}; // R1, R2, R3, R4
byte colPins[COLS] = {A4, A5, 9}; // C1, C2, C3

Keypad keypad = Keypad(makeKeymap(keys), rowPins, colPins, ROWS, COLS);

// -------------------- Password --------------------
String correctPassword = "19887";
String enteredPassword = "";

// -------------------- Timer --------------------
bool doorOpen = false;
unsigned long openTime = 0;
const unsigned long autoCloseDelay = 10000; // 10 seconds

void setup() {
lcd.begin(16, 2);
doorServo.attach(servoPin);

closeDoor();

lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Enter Password");
lcd.setCursor(0, 1);
}

void loop() {
char key = keypad.getKey();

if (key) {
// If # is pressed, close the door immediately
if (key == '#') {
closeDoor();
enteredPassword = "";

  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Door Closed");
  delay(1500);

  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Enter Password");
  lcd.setCursor(0, 1);
}
// Ignore * as a function key here
else if (key == '*') {
  // Optional: clear input
  enteredPassword = "";
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Enter Password");
  lcd.setCursor(0, 1);
}
else {
  // Add pressed digit
  enteredPassword += key;

  // Show * instead of real digit
  lcd.setCursor(enteredPassword.length() - 1, 1);
  lcd.print("*");

  // Check password when length matches
  if (enteredPassword.length() == correctPassword.length()) {
    if (enteredPassword == correctPassword) {
      openDoor();

      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("Access Granted");
      lcd.setCursor(0, 1);
      lcd.print("Door Open");

      openTime = millis();
      doorOpen = true;
    } else {
      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("Wrong password");
      delay(2000);

      lcd.clear();
      lcd.setCursor(0, 0);
      lcd.print("Enter Password");
      lcd.setCursor(0, 1);
    }

    enteredPassword = "";
  }
}

}

// Auto close after 10 seconds
if (doorOpen && (millis() - openTime >= autoCloseDelay)) {
closeDoor();
doorOpen = false;

lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Door Closed");
delay(1500);

lcd.clear();
lcd.setCursor(0, 0);
lcd.print("Enter Password");
lcd.setCursor(0, 1);

}
}

void openDoor() {
doorServo.write(openAngle);
}

void closeDoor() {
doorServo.write(closedAngle);
}`