HOME AUTOMATION USING GSM WITH PIC16f877a

[Amy]

hi sir… we are doing a project that concerns home automation using gsm and pic just the turning on/off of lights and some appilances . but we are just beginners in programming the pic.. should we use AT commands?? we will directly connect the gsm’s rx and tx to the pic. how will b ethe program then?? thank you..

[nidhin.k]

 

#include<pic.h>

 

#define First_Line 0x80

#define Second_Line 0xc0

#define Curser_On  0x0f

#define Curser_Off 0x0c

#define Clear_Display 0x01

#define Data_Port PORTD

 

static bit   Lcd_rs  @((unsigned) &PORTC*8+4); 

static bit   Lcd_en  @((unsigned) &PORTC*8+5);

 

#define appl1 RB7

#define appl2 RB6

#define appl3 RB5

#define appl4 RB4

 

void gsm_init();

void Lcd8_Init();

void Lcd8_Command(unsigned char);

void Lcd8_Write(unsigned char,unsigned char);

void Lcd8_Display(unsigned char,const unsigned char*,unsigned int);

void Delay(unsigned int);

 

void Serial_Init(unsigned long int);

void Serial_Out(unsigned char);

void Serial_Conout(const unsigned char *,unsigned char);

void Baudrate(unsigned long int);

void Receive(unsigned char);

 

unsigned char c[5],j;

void main()

{

TRISB=0x00;

TRISC=0xC0;

TRISD=0x00;

Lcd8_Init();

Lcd8_Display(0x80,”HOME APPLIANCES:”,16);

Lcd8_Display(0xC0,”    CONTROL:    “,16);

Delay(65000);Delay(65000);

Lcd8_Display(0xC0,”                “,16);

Serial_Init(9600);

gsm_init();

Receive(1);

while(1)

{

if(j>=2)

{

Receive(0);

if(c[1]==’a’){appl1=0;Lcd8_Display(0xC0,”APPLIANCES 1:ON “,16);}

if(c[1]==’b’){appl2=0;Lcd8_Display(0xC0,”APPLIANCES 2:ON “,16);}

if(c[1]==’c’){appl3=0;Lcd8_Display(0xC0,”APPLIANCES 3:ON “,16);}

if(c[1]==’d’){appl4=0;Lcd8_Display(0xC0,”APPLIANCES 4:ON “,16);}

if(c[1]==’c’){appl1=1;Lcd8_Display(0xC0,”APPLIANCES 1:OFF”,16);}

if(c[1]==’d’){appl2=1;Lcd8_Display(0xC0,”APPLIANCES 2:OFF”,16);}

if(c[1]==’e’){appl3=1;Lcd8_Display(0xC0,”APPLIANCES 3:OFF”,16);}

if(c[1]==’f’){appl4=1;Lcd8_Display(0xC0,”APPLIANCES 4:OFF”,16);}

j=0;

Receive(1);

}

}

}

 

void interrupt  timer1(void)

{

 if(RCIF)

 {

RCIF=0;

c[j]=RCREG;

if(c[0]==’*’)j++;

else j=0;

 }

}

void gsm_init()

{

Serial_Conout(“AT”,2);

Serial_Out(0x0d);Serial_Out(0x0a);

Delay(65000);Delay(65000);

Serial_Conout(“AT+CMGF=1”,9);  

Serial_Out(0x0d);Serial_Out(0x0a);

Delay(65000);Delay(65000);

Serial_Conout(“AT+CNMI=2,2,0,0,0”,17);  

Serial_Out(0x0d);Serial_Out(0x0a);

Delay(65000);Delay(65000);

}

 

void Lcd8_Init()

{

Lcd8_Command(0x38); //to select function set

Lcd8_Command(0x06); //entry mode set

Lcd8_Command(0x0c); //display on

Lcd8_Command(0x01); //clear display

}

 

void Lcd8_Command(unsigned char com)

{

Data_Port=com;

Lcd_en=1;

Lcd_rs=0;

Delay(125);

Lcd_en=0;

Delay(125);

}

 

void Lcd8_Write(unsigned char com,unsigned char lr)

{

Lcd8_Command(com);

 

Data_Port=lr; // Data 

Lcd_en=1;

Lcd_rs=1;

Delay(125);

Lcd_en=0;

Delay(125);

}

 

void Lcd8_Display(unsigned char com,const unsigned char *word,unsigned int n)

{

unsigned char Lcd_i;

 

for(Lcd_i=0;Lcd_i<n;Lcd_i++)

{ 

Lcd8_Write(com+Lcd_i,word[Lcd_i]);

  }

}

 

void Delay(unsigned int del)

{

while(del–);

}     

 

void Serial_Init(unsigned long int baud)

{  

Baudrate(baud);

SYNC = 0;     // asynchronous mode

SPEN = 1;     // serial port enable

TXEN = 1;     // tx enable

GIE=1;

PEIE=1;

RCIE = 1; // interrupt set

CREN = 1;     // rx enable

}

 

void Serial_Out(unsigned char val)

{

TXREG =val;

while(!TXIF);

TXIF = 0;

}

 

 

void Serial_Conout(const unsigned char *data,unsigned char n)

{

unsigned char ser_j;

for(ser_j=0;ser_j<n;ser_j++)

{

Serial_Out(data[ser_j]);

}

}

 

void Baudrate(unsigned long int baud)

{

if(baud==110) //Crystal Freq 1 Mhz

{

SPBRG = 141;          // for 110 baud rate

BRGH = 0;     // baud rate low

}

else if(baud==1200) //Crystal Freq 4 Mhz

{

SPBRG = 51;          // for 1200 baud rate

BRGH = 0;     // baud rate high

}

else if(baud==2400)

{

SPBRG = 25;          // for 2400 baud rate

BRGH = 0;     // baud rate high

}

else if(baud==4800)

{

SPBRG = 12;          // for 4800 baud rate

BRGH = 0;     // baud rate high

}

else if(baud==9600)

{

SPBRG = 25;          // for 9600 baud rate

BRGH = 1;     // baud rate high

}

else if(baud==57600)

{

SPBRG = 20;          // for 57600 baud rate

BRGH = 1;     // baud rate high

}

else if(baud==115200)

{

SPBRG = 10;          // for 115200 baud rate

BRGH = 1;     // baud rate high

}

}

 

 

void Receive(unsigned char rece)

{

if(rece==1)

{

RCIE = 1; // interrupt set

CREN = 1;     // rx enable

}

else

{

RCIE = 0; // interrupt set

CREN = 0;     // rx enable

}

}

 

[M.Khalil Anwar Nizami]

hi amy,would you like to share your project detail with me?

[M.Khalil Anwar Nizami]

nidhin.k brother,why use if(c[1]==’a’){appl1=0;Lcd8_Display(0xC0,”APPLIANCES 1:ON “,16);}

purpose you can justify?

and 16 is what?

please share

[M.Khalil Anwar Nizami]

code is perfectly ok?

where i can test it on software?proteous,multisim,etc…?

[Amy]

hi M. Khalil,, our project is to control the on/off of ligths and appliances. we will send message to the gsm modem an then the gsm is the one that is connected to the PIC16f877a. after that the PIC is connected to the relays that is connected to the appliances or ligths. after that the gsm will send a message to the phone that the command has been executed. its as if it will upadate the phone that this particular applaince is turned on… we will not use lcd. just the phone, GSM modem and the PIC…

 

we are having a difficult time in the programming part

 

[Amy]

nidhin.k,, thank you for the codes what if we will not use LCD??

[nidhin.k]

hai kalil…

 

 

 

 i’m sending sms like -*a,*b,*c,*d,*e,*f,*g,*h

 

 

while receiving sms, it is easy for identifying our msg.

on receiving a msg we will get +cmg:- +mobile number+etc…

 

in my code

 

 

if(RCIF)

 

{

c=RCREG;

if(c[0]==’*’)i++;

else i=0;

RCIF=0;

 

}

 

the array will increment only when ur msg starts with “*”

 

msg format:-

 

*a- appliance 1 ON

*b- appliance 2 ON

*c- appliance 3 ON

*d- appliance 4 ON

 

*e- appliance 1 OFF

*f- appliance 2 OFF

*g- appliance 3 OFF

*h- appliance 4 OFF

 

 

Lcd8_Display(0xC0,”APPLIANCE 1 ON  “,16);

 

please check that function… u can understand it easily.

 

In that function, i’m sending 16 character string to LCD display. strating location 0xC0

 

[nidhin.k]

hai kalil…..

 

u can test it on both software and proteus

[Amy]

where can i create this program? MPLAB or Micro C? thanks

[nidhin.k]

hi amy….

 

 

 i create this code in mp lab…..

[Amy]

hi nidhin.k,, is this program for PIC16f877a and what if we will not use LCD?? just the PIC and GSM.. thanks you very much

[nidhin.k]

hai amy….

 

 

if u are not using lcd… u can remove all the function and function call that is started with LCD….

[nidhin.k]

hai amy….

 

 

if u are not using lcd… u can remove all the function and function call that is started with “Lcd”….

 

 

all the best….

[Maxwell Ogos]

hello sir, im making a project named, GSM based motion detector. i did some research on how to make the program code but i didnt found any. so maybe you guys could help me out with the program code?

i am using a  PIR sensor with 2×16 LCD and a Wavecom GSM on PIC18F4550. i am a MPLab v8.66 user. 

thank your for your cooperation.

[Author]

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