The smart door lock system

I have simulated a Smart Door System using the Proteus EDA. It can be implemented to open any type of door looks from the doors, gates, windows and the lockers. I have simulated the project through the Proteus and it is working as expected.

The smart door system is a project that is aimed at improving the security system of our locks especially the door ways. I have done the system schematic on the Proteus EDA and simulated to ensure that it is functioning as expected. The simulation process involves the use of a program to run the microcontroller that acts as the control system of the whole project. I did the code in KEIL IDE.

Components
1. 8051 microcontroller - AT89C51.
2. 9V Battery
3. 4 x 4 Calculator Keypad.
4. DC Motor Driver - L293D.
5. LCD Display - LM016L
6. DC Motor

Code

#include
#include

sbit RS = P3^0;
sbit EN = P3^1;
sbit IN1 =P3^2;
sbit IN2 = P3^3;

void delay(int a)
{
int i,j;
for(i=0;i for(j=0;j<255;j++);
}

void cmd(char cm)
{
P2 = cm;
RS = 0;
EN = 1;
delay(1);
EN = 0;
}

void dat(char dt)
{
P2 = dt;
RS = 1;
EN = 1;
delay(1);
EN = 0;
}

void display(char *lcd)
{
while(*lcd != '\0')
{
dat(*lcd);
lcd++;
}
}

void lcdint()
{
cmd(0x01);
cmd(0x38);
cmd(0x0E);
cmd(0x80);
}

void main()
{
char pass[5] = "1234";
char pass2[5];
int i=0;
char *ptr;
ptr = pass2;
lcdint();
display("Password-");
pass2[4]='\0';

while(1)
{
while(i<4)
{
P1=0xFE;
if(P1==0xEE)
{
*(ptr+i)='7';
dat('7');
delay(200);
cmd(0x06);

i++;
}
else if(P1==0xDE)
{
*(ptr+i)='8';
dat('8');
delay(200);
cmd(0x06);

i++;
}
else if(P1==0xBE)
{
*(ptr+i)='9';
dat('9');
delay(200);
cmd(0x06);

i++;
}
else if(P1==0x7E)
{
*(ptr+i)='/';
dat('/');
delay(200);
cmd(0x06);

i++;
}

P1=0xFD;
if(P1==0xED)
{
*(ptr+i)='4';
dat('4');
delay(200);
cmd(0x06);

i++;
}
else if(P1==0xDD)
{
*(ptr+i)='5';
dat('5');
delay(200);
cmd(0x06);

i++;
}
else if(P1==0xBD)
{
*(ptr+i)='6';
dat('6');
delay(200);
cmd(0x06);

i++;
}
else if (P1==0x7D)
{
*(ptr+i)='*';
dat('*');
delay(200);
cmd(0x06);

i++;
}

P1=0xFB;
if(P1==0xEB)
{
*(ptr+i)='1';
dat('1');
delay(200);
cmd(0x06);

i++;
}
else if(P1==0xDB)
{
*(ptr+i)='2';
dat('2');
delay(200);
cmd(0x06);

i++;
}
else if(P1==0xBB)
{
*(ptr+i)='3';
dat('3');
delay(200);
cmd(0x06);

i++;
}
else if(P1==0x7B)
{
*(ptr+i)='-';
dat('-');
delay(200);
cmd(0x06);

i++;
}

P1=0xF7;
if(P1==0xE7)
{
*(ptr+i)='C';
dat('C');
delay(200);
cmd(0x06);

i++;
}
else if(P1==0xD7)
{
*(ptr+i)='0';
dat('0');
delay(200);
cmd(0x06);

i++;
}
else if(P1==0xB7)
{
*(ptr+i)='=';
dat('=');
delay(200);
cmd(0x06);

i++;
}
else if(P1==0x77)
{
*(ptr+i)='+';
dat('+');
delay(200);
cmd(0x06);

i++;
}
}

while(i==4)
{
if ((strcmp(pass, pass2)) == 0)
{
cmd(0xC0);
display("Correct");
IN1 = 1;
IN2 = 0;
delay(100);
}
else
{
cmd(0xC0);
display("Incorrect");
IN1 = 0;
IN2 = 0;
delay(100);
}
}
}
}