Receiving OK response for AT command via PIC Microcontroller

See more:

C

compiler

char rcv[10];
void main()
{

UART1_Init(9600);
Delay_ms(2000);
TRISB=0x00;

UART1_Write_Text("at");
UART1_Write(13); //Enter key = CF + LF
UART1_Write(10);
delay_ms(500);

while (1)
{ PORTB.RB0=1; // Endless loop
while(!UART1_Data_Ready()); // If data is received,
rcv[0]=UART1_Read();
rcv[1]=UART1_Read();
rcv[2]='\0';
UART1_Write_Text(rcv);
PORTB.RB0=0;
}
}

I get the rcv output as ATTTTTTTTT. Pls help me out here to receive OK response from GSM Modem.
Using PIC 18F4520 in PICPLC16v6 development board from Mikroelectronika.