Description
Often times, we need to secure a room at our home or office so that no one can access the room without our permission and ensure protection against theft or loss of our important accessories. There are so many types of security systems present today for authentication they all relay on fingerprint, retina scanner, iris scanner, face id, tongue scanner, RFID reader, password, pin, patterns, etc. From all these solutions the low-cost one is to use a password or pin-based system. So, in this project, We are going to built an Arduino Keypad Door Lock which can be mounted to any of your existing doors to secure them with a digital password.
Often times, we need to secure a room at our home or office so that no one can access the room without our permission and ensure protection against theft or loss of our important accessories. There are so many types of security systems present today for authentication they all relay on fingerprint, retina scanner, iris scanner, face id, tongue scanner, RFID reader, password, pin, patterns, etc. From all these solutions the low-cost one is to use a password or pin-based system. So, in this project, We are going to built an Arduino Keypad Door Lock which can be mounted to any of your existing doors to secure them with a digital password.
Components Required
| 1. | Arduino UNO | * 1 |
| 2. | 4*4 LED Matrix Keypad | * 1 |
| 3. | Servomotor | * 1 |
| 4. | LCD(16*2) | * 1 |
| 5. | Customised Door Locker | * 1 |
| 6. | Power Supply of 1A and 5V | * 1 |
| 7. | Jumper Wires | * 1 |
Circuit Diagram
Program
#include <Keypad.h>
#include <LiquidCrystal.h>
#include <Servo.h>
Servo myservo;
LiquidCrystal lcd(A0, A1, A2, A3, A4, A5);
#define Password_Lenght 7 // Give enough room for six chars + NULL char
int pos = 0; // variable to store the servo position
char Data[Password_Lenght]; // 6 is the number of chars it can hold + the null char = 7
char Master[Password_Lenght] = "123456";
byte data_count = 0, master_count = 0;
bool Pass_is_good;
char customKey;
const byte ROWS = 4;
const byte COLS = 3;
char keys[ROWS][COLS] = {
{'1', '2', '3'},
{'4', '5', '6'},
{'7', '8', '9'},
{'*', '0', '#'}
};
bool door = true;
byte rowPins[ROWS] = {1, 2, 3, 4}; //connect to the row pinouts of the keypad
byte colPins[COLS] = {5, 6, 7}; //connect to the column pinouts of the keypad
Keypad customKeypad( makeKeymap(keys), rowPins, colPins, ROWS, COLS); //initialize an instance of class NewKeypad
void setup()
{
myservo.attach(9);
ServoClose();
lcd.begin(16, 2);
lcd.print(" Arduino Door");
lcd.setCursor(0, 1);
lcd.print("--Look project--");
delay(3000);
lcd.clear();
}
void loop()
{
if (door == 0)
{
customKey = customKeypad.getKey();
if (customKey == '#')
{
lcd.clear();
ServoClose();
lcd.print(" Door is close");
delay(3000);
door = 1;
}
}
else Open();
}
void clearData()
{
while (data_count != 0)
{ // This can be used for any array size,
Data[data_count--] = 0; //clear array for new data
}
return;
}
void ServoOpen()
{
for (pos = 180; pos >= 0; pos -= 5) { // goes from 0 degrees to 180 degrees
// in steps of 1 degree
myservo.write(pos); // tell servo to go to position in variable 'pos'
delay(15); // waits 15ms for the servo to reach the position
}
}
void ServoClose()
{
for (pos = 0; pos <= 180; pos += 5) { // goes from 180 degrees to 0 degrees
myservo.write(pos); // tell servo to go to position in variable 'pos'
delay(15); // waits 15ms for the servo to reach the position
}
}
void Open()
{
lcd.setCursor(0, 0);
lcd.print(" Enter Password");
customKey = customKeypad.getKey();
if (customKey) // makes sure a key is actually pressed, equal to (customKey != NO_KEY)
{
Data[data_count] = customKey; // store char into data array
lcd.setCursor(data_count, 1); // move cursor to show each new char
lcd.print(Data[data_count]); // print char at said cursor
data_count++; // increment data array by 1 to store new char, also keep track of the number of chars entered
}
if (data_count == Password_Lenght - 1) // if the array index is equal to the number of expected chars, compare data to master
{
if (!strcmp(Data, Master)) // equal to (strcmp(Data, Master) == 0)
{
lcd.clear();
ServoOpen();
lcd.print(" Door is Open");
door = 0;
}
else
{
lcd.clear();
lcd.print(" Wrong Password");
delay(1000);
door = 1;
}
clearData();
}
}