TC35i GSM With PIC 16F690 help

[sunsun]

hi all,

I have read through the discussion that you guys had. They are so informative and useful. Now I want to send message to the PIC16f690 to turn on a LED. My GSM and PIC can work well with hyperterminal. However, if i want to have a direct connection from GSM to PIC, i dont get any response. Any ideas?

char AT[]={0x41,0x54,0x2B,0x43,0x4D,0x47,0x52,0x3D,0x34,0x0 D,0x0A}; //AT+CMGR=1

while(1)
{
for (j=0;j<11;j++)
{
TXREG=AT[j];
for (i=0;i<500;i++){
}
}

if (RCREG=='T') // if receive T then turn on LED
{
PORTC=0x01;
}
for (i=0;i<1000;i++){
}

}