atmega8 + HC-05

[Devjeet Mandal]

hello everyone..
i was trying to interface HC-05 bluetooth module with atmega8. F_CPU=1MHz and baud rate for communication is 9600. i have a led at PORTB pin 0 and i will use any bluetooth app from play store to turn the led on or off.

usart.h

void usart_init(uint16_t ubrr_value)
{
UBRRL = ubrr_value;
UBRRH = (ubrr_value>>8);
UCSRB|= (1<<RXEN)|(1<<TXEN);
UCSRC |= (1 << URSEL)|(3<<UCSZ0);
}


unsigned char usart_data_receive( void )
{
while ( !(UCSRA & (1<<RXC)) )
;
return UDR;
}



hc-05.h

char hc_05_bluetooth_receive_byte(void)
{
return usart_data_receive();
}


main.c

int main(void)
{
DDRB=0x01;
char received_data;
usart_init(6);
while(1)
{
received_data=hc_05_bluetooth_receive_byte();
if(received_data == '1')
{
PORTB=0x01;
}
else if(received_data == '2')
{
PORTB=0x00;
}
else
{

}
}
}



any guess why its not working?