this is the code for sms based home automation. in this code i can control 4 appliances….
SMS COMMANDS
*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)
#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;
appl1=appl2=appl3=appl4=1;
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]==’e’){appl1=1;Lcd8_Display(0xC0,”APPLIANCES 1:OFF”,16);}
if(c[1]==’f’){appl2=1;Lcd8_Display(0xC0,”APPLIANCES 2:OFF”,16);}
if(c[1]==’g’){appl3=1;Lcd8_Display(0xC0,”APPLIANCES 3:OFF”,16);}
if(c[1]==’h’){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
}
}