Pic gsm modem problem

[benajad]

I have implemented a code for pic16f877a that sends at commands to a modem (gl 6100). I have seen the commands sended by the pic in the hyperterminal and they are right. Also I cand send commands from the hyperterminal to the pic generating an interruption in the pic.
When I send those commands through the hyperterminal the modem responses and send the message.
Im not recieving any signal from the modem. The connections are basicly the next: One 10k resistor from rx pin to 5 V. One resistor from tx pin to 5 V. Those pins are conected to a max 232 and the output to the serial conector to the modem.
The code for the pic is:

#include <16f877A.h>
#FUSES XT,NOWDT, NOPROTECT,NOLVP
#USE delay( clock = 4000000)
#include <string.h>
#include <stdlib.h>
#include <ctype.h>
#use rs232(baud=9600, xmit=pin_c6, rcv=pin_c7, RESTART_WDT, bits=8)


char string[30];
#int_rda 
void serial_isr() {
gets(string);
}

void main() {


  enable_interrupts(int_rda);
  enable_interrupts(global);
    
   delay_ms(1000);
  // lcd_putc("Inicia");
   
 
  while(1){
    printf("AT");
   printf(0x1a);
   printf(0x0d);
  //  delay_ms(2000);
  //  printf("recibio... %s",string);
   delay_ms(1000);
    puts("AT+WIPCFG=1");
    delay_ms(1000);
    puts("AT+WIPBR=1,6");
    delay_ms(1000);
    puts("AT+WIPBR=2,6,11,\"internet.movistar.com.co\"");
    delay_ms(1000);
    puts("AT+WIPBR=2,6,0,\"movistar\"");
    delay_ms(1000);
    puts("AT+WIPBR=2,6,1,\"movistar\"");
    delay_ms(1000);
    puts("AT+WIPBR=4,6,0 ");
    delay_ms(5000);
    puts("AT+WIPCREATE=2,1,\"190.84.22.50\",4420");
    delay_ms(2000);
    puts("AT+WIPDATA=2,1,1");
    delay_ms(2000);
    printf(" \Recibio...");
    delay_ms(1000);
    printf("+++");
    delay_ms(1000);
    puts("AT+WIPCLOSE=2,1");
    delay_ms(1000);
    puts("AT+WIPCFG=0"); 
    delay_ms(5000);
  }
}

Sorry for my english. Thank you very much.

 

[horace1]

in your AT command sequence

    printf("AT");
   printf(0x1a);
   printf(0x0d);

why are you outputting 0x1a (the ASCII SUB character) - did you mean to output 0x0a (ASCII LF)?

 

[benajad]

sorry is 0a, but still not work

 

[ckshivaram]

what is the purpose of putting in while(1) loop

it will execute infinitely and will never stop, this will cause modem to reset again and again..

first test it with hyper terminal and the write the program........

 

[thunderboympm]

i think a short circuit is needed in between pin 4 and 6 of db9 connector of the gsm modem.