Overview
Things
Story

1) Lock System
2) Keypad Section
3) GSM Modem
4) Power Supply
5) IC Section
6) Display Section

Published February 4, 2016 © LGPL

Keypad and SMS based dual door lock system

dual lock system is designed to open door using password by entering it through keypad and if the guest comes opening it using SMS

IntermediateFull instructions provided1,596

Keypad and SMS based dual door lock system

Things used in this project

Hardware components

12 0 12 transformer

diode in 4007

capacitor 100uf

Linear Regulator (7805)

Adafruit Standard LCD - 16x2 White on Blue

resistance 10 k ohm

resistance 1k ohm

33 pf capacitance

11.0592 mhz crystal

capacitance 10 uf

ic 24c04

ic L293D

16 pin ic base

8 pin IC base

DC motor 12v geared

Box as a door

connecting wires

berge stick male

berge stick female

GSM modem

tectile switch big 4 pin

ic at89c51

40 pin ic base

Hand tools and fabrication machines

Soldering iron (generic)

Story

Dual password lock system is designed to open lock via Keypad when available at home and via SMS when away from home in case the guest arises

The SMS feature also provide the availability to change password.

1) Lock System

It can be designed used metallic with magnetic lock in actual door.

Here i have used a box which is connected to a 12v DC geared motor having 60 rpm.

It is rotated clock wise or anti clockwise to close or open the door.

The motor is being controlled by L293D ic which is known as motor driver IC.

2) Keypad Section

This section contains 10 switches numbering 0 to 9

Whenever the switch is being pressed logic "0" is being transmitted to the controller section to know whether the switch is being pressed or not.

3) GSM Modem

It is used to provide the SMS facility to the system as we are using dual facility for password using keypad and SMS

The SMS facility also provide us the option of changing the password as this option is not added in keypad

4) Power Supply

This unit provides power to the complete section which is designed using 12-0-12 transformer and rectifier section and capacitor 1000uf and regulator 7805

5) IC Section

Containing the IC of controller, EEPROM and motor driver

It is used to

Store password
Display on LCD whether correct or wrong password
Verification of password
For storing new password
Verification of SMS
Controlling of motor

6) Display Section

LCD 16x2 is used for displaying

Whether sms is received or not
Received sms is correct or not
Whether password is correct or not

Code

project code

#include<reg51.h>	   	 
#include<intrins.h>	  

sbit s1=P2^0;
sbit s2=P2^1;
sbit s3=P2^2;
sbit s4=P2^3;
sbit s5=P2^4;
sbit s6=P2^5;
sbit s7=P2^6;
sbit s8=P2^7;
sbit s9=P0^6;
sbit s0=P0^7;

sbit m1=P3^4;
sbit m2=P3^5;
			 
sbit rs=P3^6;
sbit en=P3^7;

sbit SCL=P3^2;
sbit SDA=P3^3;

void delay(unsigned int w)
{
unsigned int q;
for(q=0;q<w;q++);
}

void start()
{
   SDA = 1 ;	   _nop_() , _nop_() , _nop_() ;
   SCL = 1 ;	   _nop_() , _nop_() , _nop_() ;
   SDA = 0 ; 	   _nop_() , _nop_() , _nop_() ;
   SCL = 0 ;	   _nop_() , _nop_() , _nop_() ;
}

void stop()
{
   SDA = 0 ;	 _nop_() , _nop_() , _nop_() ;
   SCL = 1 ;	 _nop_() , _nop_() , _nop_() ;
   SDA = 1 ;	 _nop_() , _nop_() , _nop_() ;
   SCL = 0 ;	 _nop_() , _nop_() , _nop_() ;
}

void clock()
{
   SCL = 1 ;	 _nop_() ; _nop_() ; _nop_() ;
   SCL = 0 ;	 _nop_() ; _nop_() ; _nop_() ;
}

void nack()
{
    SDA = 1 ;	  clock() ;
} 


void waitack()
{
    SDA = 1 ;	  clock() ;
}

void opdat(unsigned char dat)
{
   unsigned char i ;
   for ( i = 0 ; i < 8 ; i++ )
   {
      if ( ( dat >> ( 7 - i ) ) & 0x01 ) 	SDA = 1 ; 
      else	 			SDA = 0 ;
      clock() ;
   }
}

void i2c_write(unsigned char dat,unsigned char addr)
{                   	
	start();		 //dummy write start 	
	opdat(0xa0);	//send dev addr
	waitack();
	opdat(addr);
	waitack();
	opdat(dat);		//write data
	waitack();
	stop();
}	
		
unsigned char getdat()
{
   unsigned char i , dat;
   SDA = 1;	   _nop_() , _nop_() , _nop_();
 for ( i = 0 ; i < 8 ; i++ ) 
   {
	  dat = ( ( ( dat << 1 ) & 0xfe ) | SDA );
	  clock();
   }
   return dat;
}

unsigned char i2c_read(unsigned char addr)
{ 
 unsigned char rdata;
start();		//dummy write start
opdat(0xa0);	//send dev addr
waitack();
opdat(addr);
waitack();
	start();				//start read
       opdat(0xa1);   //give device adddr or with for read 
        waitack();	//operation coz lsb gives r|w
        rdata = getdat();
        nack() ;
        stop() ;
        return(rdata);
}
  
void cd(unsigned char w)
{
P1=w;
rs=0;
en=1;
delay(500);
en=0;
}	 

void dd(unsigned char w)
{
P1=w;
rs=1;
en=1;
delay(500);
en=0;
}
		   
void lcd(unsigned char *h)
{
while(*h!=0)
{
dd(*h);
h++;
}
}

void tx(unsigned char num)
{ 
SBUF = num;
while(TI == 0);
TI = 0;
}

void tx_str(unsigned char *y)
{
while(*y!='\0')
	{
		tx(*y);
		y++;
	}
}

void main()
{
unsigned int e;
unsigned char r,q,w,arr1[6],arr[20];

SCON=0x50;
TMOD=0x20;
TH1=0xfd;
TR1=1;		

m1=m2=0;										  

cd(0x38);
cd(0x06);
cd(0x0e);

qwe: 
for(w=0;w<16;w++)
{
arr[w]=0;
}
tx_str("AT");
tx(0x0d);			  
delay(60000);	
tx_str("AT+CMGF=1");
tx(0x0d);	  
delay(60000);
tx_str("AT+CMGD=1");
tx(0x0d);
delay(60000); 					 
delay(60000); 	

cd(0x01);
cd(0x80);
lcd(" ENTER PASSWORD ");		 
cd(0xc0);	   
q=0;
while(1)
{
if(s1==0)
{
dd('*');
while(s1==0);
delay(10000);
arr[q]='1';
q=q+1;
}
else if(s2==0)
{		
dd('*');
while(s2==0);
delay(10000);  
arr[q]='2';
q=q+1;
}		
else if(s3==0)
{		
dd('*');
while(s3==0);
delay(10000);
arr[q]='3';
q=q+1;
}					  
else if(s4==0)
{		
dd('*');
while(s4==0);
delay(10000);
arr[q]='4';
q=q+1;
}		
else if(s5==0)
{		
dd('*');
while(s5==0);
delay(10000);
arr[q]='5';
q=q+1;
}		
else if(s6==0)
{		
dd('*');
while(s6==0);
delay(10000);
arr[q]='6';
q=q+1;
}		
else if(s7==0)
{		
dd('*');
while(s7==0);
delay(10000);
arr[q]='7';
q=q+1;
}		
else if(s8==0)
{		
dd('*');
while(s8==0);
delay(10000);
arr[q]='8';
q=q+1;
}		
else if(s9==0)
{		
dd('*');
while(s9==0);
delay(10000);
arr[q]='9';
q=q+1;
}		
else if(s0==0)
{		
dd('*');
while(s0==0);
delay(10000);
arr[q]='0';
q=q+1;
}
if(q>=6)
{
for(w=0;w<6;w++)
{
arr1[w]=i2c_read(w);
delay(100);
}	
delay(60000);
delay(60000);
if(arr1[0]==arr[0] && arr1[1]==arr[1] && arr1[2]==arr[2] && arr1[3]==arr[3] && arr1[4]==arr[4] && arr1[5]==arr[5])
{
w=i2c_read(12);
delay(100);								 
cd(0x80);
lcd("CORRECT PASSWORD");	
if(w==1)
{								 
cd(0xc0);
lcd(" DOOR  IS  OPEN ");
goto qwe;	
}
else
{	  					 
cd(0xc0);		  
i2c_write(1,12);
delay(200);
lcd("  PLEASE  WAIT  ");		  
m1=0;
m2=1;
delay(45000);	
m1=0;
m2=0;		 
goto qwe;	
}	 
}	   
for(w=0;w<6;w++)
{
arr1[w]=i2c_read(w+6);
delay(100);
}	/*		 
for(w=0;w<6;w++)
{
dd(arr1[w]);
delay(100);
}	*/		 
delay(60000);
delay(60000);
if(arr1[0]==arr[0] && arr1[1]==arr[1] && arr1[2]==arr[2] && arr1[3]==arr[3] && arr1[4]==arr[4] && arr1[5]==arr[5])
{
w=i2c_read(12);
delay(100);								 
cd(0x80);
lcd("CORRECT PASSWORD");	
if(w==0)
{								 
cd(0xc0);
lcd(" DOOR IS CLOSED ");
goto qwe;	
}
else
{	  			  
i2c_write(0,12);
delay(200);			 
cd(0xc0);
lcd("  PLEASE  WAIT  ");		 
m1=1;
m2=0;
delay(52000);		 
m1=0;
m2=0;	
goto qwe;	
}	 
}
cd(0x80);
lcd(" WRONG PASSWORD ");		   
cd(0xC0);
lcd("PLEASE TRY AGAIN");
goto qwe;
}  	 					
if(RI==1)
{
w=SBUF;
RI=0;
if(w=='+')
{
e=0;
while(RI==0)
{
e=e+1;
if(e>30000)
goto qwe;
}
RI=0;
q=SBUF; 
e=0;
while(RI==0)
{
e=e+1;
if(e>30000)
goto qwe;
}
RI=0;
q=SBUF; 
e=0;
while(RI==0)
{
e=e+1;
if(e>30000)
goto qwe;
}
RI=0;
q=SBUF; 
if(q=='T')
{
delay(30000);
tx(0x0d);
cd(0x80);
lcd("  SMS RECEIVED  ");		   
cd(0xC0);
lcd("PLEASE WAIT.....");
tx_str("AT+CMGR=1");
tx(0x0d);
delay(30000);
delay(30000);
wer:	   
e=0;
while(RI==0)
{
e=e+1;
if(e>30000)
{
cd(0x80);
lcd("   WRONG  SMS   ");		   
cd(0xC0);
lcd("PLEASE TRY AGAIN");
goto qwe;
}
}
RI=0;
r=SBUF; 
if(r!='*')
goto wer;	
r=0;
ert:   
e=0;
while(RI==0)
{
e=e+1;
if(e>30000)
{
cd(0x80);
lcd("   WRONG  SMS   ");		   
cd(0xC0);
lcd("PLEASE TRY AGAIN");
goto qwe;
}
}
RI=0;
arr[r]=SBUF;
r=r+1;
if(SBUF!='#')
goto ert;
if(r==11)
{		 
for(w=0;w<6;w++)
{
arr1[w]=i2c_read(w);
delay(100);
}
if(arr[0]=='D' && arr[1]==' ' && arr[2]=='O' && arr[3]==' ' && arr[4]==arr1[0] && arr[5]==arr1[1] && arr[6]==arr1[2] && arr[7]==arr1[3] && arr[8]==arr1[4] && arr[9]==arr1[5])
{
w=i2c_read(12);
delay(100);
cd(0x80);
lcd("CORRECT PASSWORD");	
if(w==1)
{								 
cd(0xc0);
lcd(" DOOR  IS  OPEN ");
goto qwe;	
}
else
{	  					 
cd(0xc0);		  
i2c_write(1,12);
delay(200);
lcd("  PLEASE  WAIT  ");		  
m1=0;
m2=1;
delay(45000);	
m1=0;
m2=0;		 
goto qwe;	
}	 
}
}
if(r==11)
{
for(w=0;w<6;w++)
{
arr1[w]=i2c_read(w+6);
delay(100);
}
if(arr[0]=='D' && arr[1]==' ' && arr[2]=='C' && arr[3]==' ' && arr[4]==arr1[0] && arr[5]==arr1[1] && arr[6]==arr1[2] && arr[7]==arr1[3] && arr[8]==arr1[4] && arr[9]==arr1[5])
{
w=i2c_read(12);
delay(100);								 
cd(0x80);
lcd("CORRECT PASSWORD");	
if(w==0)
{								 
cd(0xc0);
lcd(" DOOR IS CLOSED ");
goto qwe;	
}
else
{	  			  
i2c_write(0,12);
delay(200);			 
cd(0xc0);
lcd("  PLEASE  WAIT  ");		 
m1=1;
m2=0;
delay(52000);		 
m1=0;
m2=0;	
goto qwe;	
}	 
}
}	 
if(r==18)
{		 
for(w=0;w<6;w++)
{
arr1[w]=i2c_read(w);
delay(100);
}
if(arr[0]=='P' && arr[1]==' ' && arr[2]=='O' && arr[3]==' ' && arr[4]==arr1[0] && arr[5]==arr1[1] && arr[6]==arr1[2] && arr[7]==arr1[3] && arr[8]==arr1[4] && arr[9]==arr1[5] && arr[10]==' ')
{		   
for(w=0;w<6;w++)
{
i2c_write(arr[w+11],w);
delay(1200);
}
cd(0x80);
lcd("PASSWORD CHANGED");	
cd(0xc0);
lcd("SUCCESSFULLY - O");
goto qwe;	
}
}	 
if(r==18)
{		 
for(w=0;w<6;w++)
{
arr1[w]=i2c_read(w+6);
delay(100);
}
if(arr[0]=='P' && arr[1]==' ' && arr[2]=='C' && arr[3]==' ' && arr[4]==arr1[0] && arr[5]==arr1[1] && arr[6]==arr1[2] && arr[7]==arr1[3] && arr[8]==arr1[4] && arr[9]==arr1[5] && arr[10]==' ')
{		   
for(w=0;w<6;w++)
{
i2c_write(arr[w+11],(w+6));
delay(1200);
}
cd(0x80);
lcd("PASSWORD CHANGED");	
cd(0xc0);
lcd("SUCCESSFULLY - C");
goto qwe;	
}
}
cd(0x80);
lcd("   WRONG  SMS   ");		   
cd(0xC0);
lcd("PLEASE TRY AGAIN");
goto qwe;
}
}
}  
}
}

Credits

Sumit Grover

8 projects • 31 followers

Keypad and SMS based dual door lock system