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here is main

void main()
{
char d;
int8 i;

enable_interrupts(int_rda);
enable_interrupts(global);

for(i=0;i<10;i++)
delay_ms( 1000 & ...

hi
We used the interrupt.
Now the program is not hanging. but now the problem is, sometime, it is not detecting 'K'. ie, last character of OK. So, even if the at command sends and got reply 'OK', it ...

thank you very much for reply

instead of string, we tried to read character wise.

do
{
c=getc();

if (c== 'E')
{
printf("AT");
delay_ms& ...

hi
we are interfacing sim 300 with PIC18f.
if i m sending at commands from microcontroller to modem , it is working perfect. we monitor via hyperterminal.
but if i m checking for 'OK' after each at ...