[PIC] How to compare the calling no in gsm coding for controlling the load

Logu KS · Sep 18, 2014

I programmed for controlling a pin in my controller using a call made to the sim number connected in the quectel m10 gsm modem. I wrote the code for comparing the RING which we will get while calling. But my requirement is to control that through a particular number. When i call from a particular number the switching operation should take place. For that what i have to do.

I tried AT+CLIP=1;
which showed the dialling number in hyperterminal when the modem is connected to PC.
But I have to compare that number also so that switching of the load will take place by that number alone.

speedEC · Sep 18, 2014

you have to store the number (in eeprom memory) you want to compare with incoming phone number. then you can parse the incoming number from the string that you received when receiving incoming call and compare with the already stored number.

Venkadesh_M · Sep 18, 2014

use string compare functions.

Logu KS · Sep 18, 2014

my at commands for receiving call is
AT
Modem respone OK
ATE0
OK
AT+CLIP=1
OK

Now the modem is configure

if i call then the following comes in hyperterminal

RING

+CLIP: "+91XXXXXXXXXX",145,"",,"",0

in my code i wrote comparision for RING. For that o/p is coming correctly. If i call from any number i am getting output but i need output only when i call from my number.

- - - Updated - - -

i compare like this

Code:

if(msg[0]=='R'&&msg[1]=='I'&&msg[2]=='N'&&msg[3]=='G'&&msg[4]=='+'&&msg[5]=='C'&&msg[6]=='L'&&msg[7]=='I'&&msg[8]=='P'&&msg[9]==':'&&msg[10]==' '&&msg[11]=='"'&&msg[12]=='+'&&msg[13]=='9'&&msg[14]=='1'&&msg[15]=='9'&&msg[16]=='7'&&msg[17]=='8'&&msg[18]=='9'&&msg[19]=='3'&&msg[20]=='9'&&msg[21]=='3'&&msg[22]=='7'&&msg[23]=='2'&&msg[24]=='4'&&msg[25]=='"'&&msg[26]==','&&msg[27]=='1'&&msg[28]=='4'&&msg[29]=='5'&&msg[30]==','&&msg[31]=='"'&&msg[32]=='"'&&msg[33]==','&&msg[34]==','&&msg[35]=='"'&&msg[36]=='"'&&msg[37]==','&&msg[38]=='0')
	  		{
	      		RD0=0;
	      		RD1=0;
	      		for(del=0;del<30;del++)
	      		{
	    		delay(60000);
	    		}
				RD0=1;
				RD1=1;
			}

- - - Updated - - -

i compare like this

Code:

if(msg[0]=='R'&&msg[1]=='I'&&msg[2]=='N'&&msg[3]=='G'&&msg[4]=='+'&&msg[5]=='C'&&msg[6]=='L'&&msg[7]=='I'&&msg[8]=='P'&&msg[9]==':'&&msg[10]==' '&&msg[11]=='"'&&msg[12]=='+'&&msg[13]=='9'&&msg[14]=='1'&&msg[15]=='9'&&msg[16]=='7'&&msg[17]=='8'&&msg[18]=='9'&&msg[19]=='3'&&msg[20]=='9'&&msg[21]=='3'&&msg[22]=='7'&&msg[23]=='2'&&msg[24]=='4'&&msg[25]=='"'&&msg[26]==','&&msg[27]=='1'&&msg[28]=='4'&&msg[29]=='5'&&msg[30]==','&&msg[31]=='"'&&msg[32]=='"'&&msg[33]==','&&msg[34]==','&&msg[35]=='"'&&msg[36]=='"'&&msg[37]==','&&msg[38]=='0')
	  		{
	      		RD0=0;
	      		RD1=0;
	      		for(del=0;del<30;del++)
	      		{
	    		delay(60000);
	    		}
				RD0=1;
				RD1=1;
			}

i moved RCREG contents to msg[]

Venkadesh_M · Sep 18, 2014

Code C - [expand]
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
char function(void)
{
char string[];
char number[]= "xxxxxxxxxx";
 
for(i = 0; string[i] != 0; i++)
 {
   if(string[i] == num[0])
   {
     for(j = 0; num[j]!= 0; j++)
     if(string[i + j] != num[j])
     break;
   
     if(num[j] == 0)
     return TRUE
   }
}
return FALSE
}

Logu KS · Sep 18, 2014

Code:

#include<pic.h>

void serial_init();
void serial_char(unsigned char);
void serial_string(unsigned char *);
void serial_get(unsigned char);
void gsm_init();
void delay(unsigned int);
unsigned char msg[40],j=0,start=0,got=0,rec;

void delay(unsigned int del)
{
	while(del--);
}

void serial_init()
{
	TXSTA=0X24;
	RCSTA=0X90;
	SPBRG=25;
}

void serial_char(unsigned char val)
{
	TXREG=val;
	while(!TXIF);
	TXIF=0;
}

void serial_string(unsigned char *string)
{
	while(*string)
	{
		serial_char(*string++);
	}
}

void gsm_init()
{
	serial_string("AT");
	serial_char(0x0d);
	serial_char(0x0a);
	delay(65000);
	delay(65000);
	serial_string("ATE0");
	serial_char(0x0d);
	serial_char(0x0a);
	delay(65000);
	delay(65000);
	serial_string("AT+CLIP=1");
	serial_char(0x0d);
	serial_char(0x0a);
	delay(65000);
	delay(65000);
//	serial_string("AT+CMGF=1");
//	serial_char(0x0d);
//	serial_char(0x0a);
//	delay(65000);
//	delay(65000);
//	serial_string("AT+CNMI=2,2,0,0,0");
//	serial_char(0x0d);
//	serial_char(0x0a);
//	delay(65000);
//	delay(65000);
//	serial_string("AT+CLIP=1");
//	serial_char(0x0d);
//	serial_char(0x0a);
//	delay(65000);
//	delay(65000);
}

void interrupt external()
{
	if(RCIF)
	{			
		rec=RCREG;
		if(start==1)
		{
			msg[j]=rec;
			j++;
			if(rec==0X0D)
			{
				got=1;
			}
		}
		if(start==0)
		{ 
            if(rec==0X0A)
			{
				start=1;
			}
		}
	RCIF=0;
	}
}

void main()
{
	unsigned char del;
	TRISD=0X00;
	PORTD=0X00;
	RD0=1;
	RD1=1;
	GIE=1; 
 	PEIE=1;           
 	INTE=1;
	RCIE=1;
 	RCIF=0;         
 	INTEDG=1;
 	serial_init();
 	delay(65000);
	delay(65000);
	gsm_init();
	
	while(1)
	{
		if(got==1)
    	{ 
        	got=0;
      		j=0;
      		start=0;

       		if(msg[0]=='R'&&msg[1]=='I'&&msg[2]=='N'&&msg[3]=='G'&&msg[4]=='+'&&msg[5]=='C'&&msg[6]=='L'&&msg[7]=='I'&&msg[8]=='P'&&msg[9]==':'&&msg[10]==' '&&msg[11]=='"'&&msg[12]=='+'&&msg[13]=='9'&&msg[14]=='1'&&msg[15]=='9'&&msg[16]=='7'&&msg[17]=='8'&&msg[18]=='9'&&msg[19]=='3'&&msg[20]=='9'&&msg[21]=='3'&&msg[22]=='7'&&msg[23]=='2'&&msg[24]=='4'&&msg[25]=='"'&&msg[26]==','&&msg[27]=='1'&&msg[28]=='4'&&msg[29]=='5'&&msg[30]==','&&msg[31]=='"'&&msg[32]=='"'&&msg[33]==','&&msg[34]==','&&msg[35]=='"'&&msg[36]=='"'&&msg[37]==','&&msg[38]=='0')
	  		{
	      		RD0=0;
	      		RD1=0;
	      		for(del=0;del<30;del++)
	      		{
	    		delay(60000);
	    		}
				RD0=1;
				RD1=1;
			}
		}
	}
}

this is my whole code in this how to compare the number.

Venkadesh_M · Sep 18, 2014

I have given the code. Just try to integrate in your code. Don expect everything to done by others.

speedEC · Sep 18, 2014

1. save the desired phone number in eeprom or in a variable (as said by venkatesh).
2. when call received, start saving all characters into variable (buffer).
3. Once you received the entire string, parse the incoming phone number from the received string and store the phone number in variable
4. read the eeprom and store in variable
5. compare both phone number
6. if true, then switch on/off the device.

pmk

- - - Updated - - -

did you see that whether all the received characters are saved correctly on msg variable?

pmk

- - - Updated - - -

for simplicity,

use the string function strstr. refer the URL:

http://www.codingunit.com/c-reference-string-h-string-operation-strstr

pmk

[PIC] How to compare the calling no in gsm coding for controlling the load

Logu KS

Member level 2

speedEC

Full Member level 6

Venkadesh_M

Advanced Member level 4

Logu KS

Member level 2

Venkadesh_M

Advanced Member level 4

Logu KS

Member level 2

Venkadesh_M

Advanced Member level 4

speedEC

Full Member level 6

Similar threads

[PIC] How to compare the calling no in gsm coding for controlling the load

Member level 2

Full Member level 6

Advanced Member level 4

Member level 2

Advanced Member level 4

Member level 2

Advanced Member level 4

Full Member level 6

Similar threads

Privacy & Transparency

Privacy & Transparency