receiving message to PIC through GSM modem

pic+gsm said:

Can someone help me pleas I am not sure how I can receive a text message from the GSM such as LED1ON and switch an LED1 on I have tried few ways but I can’t make it work

Code:

void readtheUSART(char *recbuffer)
 {
    unsigned char recivedata;

       do 
		{
		       recivedata = ReadUSART();
		       *recbuffer++ = recivedata;
		}
	 while (recivedata != '\n');  
}

/////////////////////////////////////////////
// in my main 
////////////////////////////////////////////

    char readmessage[10];
    char readnewline[50];
    char message_index;
    
    // Set Text Mode
	Comm("AT+CMGF=1\r\n");
    delay(300);

    
    // Read last SMS
    delay(300);
   for (aa= 0; aa<13; aa++)  //  recv2 = AT+CMGR=1\r\n;
	{
        if (recv2[aa] == 0)
            break;
       WriteUSART(recv2[aa]);
        while ( BusyUSART() );
    }

    // Read +CMGL: <index>,<status>,<from_address>,<mr>,<scts>
    readtheUSART(readnewline);
    // Read message led1on, led1off 
    readtheUSART(readmessage);
    // Read newline
    readtheUSART(readnewline);
    
    // Read message and return the value back
    if(memcmp("LED1ON", &readmessage, 6) == 0) {
        led1 = 1;
    } else if(memcmp("LED1OFF", &readmessage, 7) == 0) {
        led1 = 0;
    }
    
    // Delete last message
    delay(300);
	for (aa= 0; aa<13; aa++)  //   recv3 = AT+CMGD=1\r\n
	{
        if (recv3[aa] == 0)
            break;
        WriteUSART(recv3[aa]);
       while ( BusyUSART() );
    }

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pic+gsm said:

What is your GSM modem? my GSM is using AT commands (TC35)
What are you using to receive the message? pic 18F

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