Hi guys welcome to meworkstelugu in this section. We make an Arduino project that is Smart door lock system using Arduino. this is the arduino projects for beginners. Now let's talk about how this project works .
working process of Smart door lock system using Arduino :
This project mainly based on Arduino and keypad when you enter the password through the keypad .that password match to what the password sets on the code. Then servo turns on then door will open. If the password is incorrect, it shows the error . If you enter the inside room, we arrange the two push buttons. This push button will help to open and close the door in inside. this way the Arduino project works what we made.
Smart door lock system components :
- Arduino BuyNow
- servo motor BuyNow
- matrix keypad BuyNow
- 16*2 LCD module BuyNow
- Breadboard BuyNow
- connecting wires BuyNow
These are the components we . If you want to buy Arduino components, I am giving my affiliate links. If you buy the components using my affiliate links, it will help to our channel and website growth. so do these small help.
making video :
watch the below video to help to make this project
Smart door lock system using Arduino and Matrix keypad circuit :
code :
//LCD config
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <Servo.h>
#include <Keypad.h>
LiquidCrystal_I2C lcd( 0x27,20,4);
//Variables
int mot_min = 180; //min servo angle (set yours)
int mot_max =90; //Max servo angle (set yours)
int character = 0;
int activated =0;
char Str[16] = {' ', ' ', ' ', ' ', ' ', ' ', '-', '*', '*', '*', ' ', ' ', ' ', ' ', ' ', ' '};
//Pins
Servo myservo;
int buzzer=11; //pin for the buzzer beep
int external = 12; //pin to inside open
int internal = 13; //pin to inside close
//Keypad config
const byte ROWS = 4; //four rows
const byte COLS = 4; //four columns
//define the cymbols on the buttons of the keypads
char hexaKeys[ROWS][COLS] = {
{'1','4','7','*'},
{'2','5','8','0'},
{'3','6','9','#'},
{'A','B','C','D'}
};
byte rowPins[ROWS] = {5, 4, 3, 2}; //connect to the row pinouts of the keypad
byte colPins[COLS] = {9, 8, 7, 6}; //connect to the column pinouts of the keypad
//initialize an instance of class NewKeypad
Keypad customKeypad = Keypad( makeKeymap(hexaKeys), rowPins, colPins, ROWS, COLS);
void setup(){
myservo.attach(10); //attach the servo to pin D10
pinMode(buzzer,OUTPUT);
pinMode(external,INPUT);
pinMode(internal,INPUT);
//Init the screen and print the first text
lcd.begin();
lcd.backlight();
lcd.clear();
lcd.print(" PASSWORD");
lcd.setCursor(0,1);
lcd.print(" -*** ");
//put the servo in the close position first
myservo.write(mot_min);
}
void loop(){
///////////////EMERGENCY OPEN/CLOSE/////////
if (digitalRead(external))
{
myservo.write(mot_max);
lcd.clear();
lcd.setCursor(2,0);
lcd.print("INSIDE OPEN");
activated = 2;
analogWrite(buzzer,240);
delay(250);
analogWrite(buzzer,200);
delay(250);
analogWrite(buzzer,180);
delay(250);
analogWrite(buzzer,250);
delay(250);
analogWrite(buzzer,LOW);
lcd.clear();
lcd.setCursor(4,0);
lcd.print("WELLCOME");
lcd.setCursor(2,1);
lcd.print("meworkstelugu");
lcd.clear();
lcd.setCursor(3,0);
lcd.print("DOOR OPEN");
lcd.setCursor(2,1);
lcd.print("meworkstelugu");
delay(500);
}
if (digitalRead(internal))
{
myservo.write(mot_min);
activated = 0;
character=0;
Str[6]= '-';
Str[7]= '*';
Str[8]= '*';
Str[9]= '*';
Str[10]= ' ';
lcd.clear();
lcd.setCursor(0,0);
lcd.print(" PASSWORD");
lcd.setCursor(0,1);
lcd.print(Str);
}
///////////////KEYPAD OPEN/CLOSE////////////
char customKey = customKeypad.getKey(); //this function reads the presed key
if (customKey){
if (character ==0)
{
Serial.println(customKey);
Str[6]= customKey;
lcd.clear();
lcd.setCursor(0,0);
lcd.print(" PASSWORD");
lcd.setCursor(0,1);
lcd.print(Str);
}
if (character ==1)
{
Serial.println(customKey);
Str[7]= customKey;
lcd.clear();
lcd.setCursor(0,0);
lcd.print(" PASSWORD");
lcd.setCursor(0,1);
lcd.print(Str);
}
if (character ==2)
{
Serial.println(customKey);
Str[8]= customKey;
lcd.clear();
lcd.setCursor(0,0);
lcd.print(" PASSWORD");
lcd.setCursor(0,1);
lcd.print(Str);
}
if (character ==3)
{
Serial.println(customKey);
Str[9]= customKey;
lcd.clear();
lcd.setCursor(0,0);
lcd.print(" PASSWORD");
lcd.setCursor(0,1);
lcd.print(Str);
}
if (character ==4)
{
Serial.println(customKey);
Str[10]= customKey;
activated=1;
}
character=character+1;
}
if (activated == 1)
{
/*Change your password below!!!
Change each of Str[6], Str[7], Str[8], Str[9]*/
if(Str[10]='A' && character==5 && Str[6]=='5' && Str[7]=='5' && Str[8]=='5' && Str[9]=='5' )
{
myservo.write(mot_max);
lcd.clear();
lcd.setCursor(4,0);
lcd.print("ACCEPTED");
activated = 2;
analogWrite(buzzer,240);
delay(250);
analogWrite(buzzer,200);
delay(250);
analogWrite(buzzer,180);
delay(250);
analogWrite(buzzer,250);
delay(250);
analogWrite(buzzer,LOW);
delay(1000);
lcd.clear();
lcd.setCursor(4,0);
lcd.print("WELLCOME");
delay(500);
lcd.setCursor(2,1);
lcd.print("meworkstelugu");
delay(1000);
lcd.clear();
lcd.setCursor(3,0);
lcd.print("DOOR OPEN");
lcd.setCursor(2,1);
lcd.print("meworkstelugu");
}
else
{
lcd.clear();
lcd.setCursor(1,0);
lcd.print("PASSWORD ERROR");
lcd.setCursor(3,1);
lcd.print("TRY AGAIN");
analogWrite(buzzer,150);
delay(3000);
analogWrite(buzzer,LOW);
character=0;
Str[6]= '-';
Str[7]= '*';
Str[8]= '*';
Str[9]= '*';
Str[10]= ' ';
activated = 0;
lcd.clear();
lcd.setCursor(4,0);
lcd.print("PASSWORD");
lcd.setCursor(0,1);
lcd.print(Str);
}
}
if (activated == 2)
{
if(customKey == 'B' )
{
myservo.write(mot_min);
activated = 0;
character=0;
Str[6]= '-';
Str[7]= '*';
Str[8]= '*';
Str[9]= '*';
Str[10]= ' ';
lcd.clear();
lcd.setCursor(0,0);
lcd.print(" PASSWORD");
lcd.setCursor(0,1);
lcd.print(Str);
}
}
}
If you have any doubts regarding to this project, contact me on Instagram or comment on YouTube video. I will help with my best.
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