AT Commands through a PIC18f2550

[Carlos Silva]

hya

can some1 help me in programing a PIC18f2550 to send AT commands in a GSM module so that i can SMS´s through it?

AT
AT+CMGF=1
AT+CMGW="telphone number"
<text>
AT+CMSS=index

This AT commands allow sending SMS´s through the GSM module linked to a PC using hyperterminal
Now i wanna use the PIC instead of the hyperterminal, can you guys help me?


Cheers from Portugal,
Carlos Silva

[meereck]

hi, that is pretty straight-forward:
you configure the UART:
#use rs232(baud=9600,xmit=PIN_C6, rcv=PIN_C7, STREAM=GSM,ERRORS)
and then use printf or fprintf function to send characters out of the PIC.
printf("ATcommand\r");
fprintf(GSM,"ATcommand\r");

[Samuel]

we still cant send the at comands using that program that carlos put into the forum, we try to use somthing like this to send a sms in the index 3

void main(){


fprintf(GSM,"AT+CPIN=1983\r");
delay_ms(2000);
fprintf(GSM,"AT+REG ?\r");
delay_ms(2000);
fprintf(GSM,"AT\r");
delay_ms(2000);
fprintf(GSM,"AT+CMGF=1\r");
delay_ms(2000);
fprintf(GSM,"AT+CMSS=3\r");
delay_ms(2000);
}

and nothing lol can some1 help us please

[Wayne_]

Need more info:

What were the settings for the PC which worked ? Baud rate etc...
Where is the rest of your code, especially the fuses and #use rs232 settings ?

Does the PIC work when connected to the PC ?

You may need \r\n at the end of the line!

[Samuel]

ok this is the code that we are using can u help please?

#include <18F2550.h> //ficheiro .h correspondente à PIC a utilizar
#fuses HSPLL,NOWDT,NOPROTECT,NOLVP,NODEBUG,USBDIV,PLL5,CPUDIV1,VREGEN //fuses configurados para a PIC18F2550
#use delay(clock=48000000) //velocidade de funcionamento
#use rs232(baud=9600,xmit=PIN_C6, rcv=PIN_C7, STREAM=GSM,ERRORS)
#include <usb_cdc.h>


void main(){


fprintf(GSM,"AT+CPIN=1983\r");

delay_ms(10000);
fprintf(GSM,"AT+REG ?\r");
delay_ms(10000);
fprintf(GSM,"AT\r");
delay_ms(10000);
fprintf(GSM,"AT+CMGF=1\r");
delay_ms(10000);
fprintf(GSM,"AT+CMSS=3\r");
delay_ms(10000);


}