Please help me, i want to send msg via gsm sim900D. I am unable to send txt using this code
#define F_CPU 11059200UL
#include <avr/io.h>
#include <avr/interrupt.h>
#include <stdio.h>
#include <stdlib.h>
#include “lcd.h”
#include <util/delay.h>
#include <inttypes.h>
#include <string.h>
void send_msg();
void init_USART();
void usart_send_string(char *str );
void usart_send(char data);
void gsm_cmd(char *cmd);
void init_USART()
{
unsigned int baud=71; //(UBRR= (Fos/ (16*baudrate) )-1 )
UBRRH =(unsigned char)(baud>>
;
; UBRRL=(unsigned char)baud;
UCSRC|=(1<<URSEL)|(3<<UCSZ0);
//Enable The receiver and transmitter
UCSRB |= (1<<RXCIE) | (1 << RXEN) | (1 << TXEN); // Turn on the transmission reception .
sei();
}
ISR (USART_RXC_vect)
{
unsigned char value;
value = UDR; // Fetch the received byte value into the variable “value”
len_recieved++;
recieved_msg[len_recieved]=value;
if(data_flag==-1)
data_flag=0;
}
}
void usart_send_string(char *str )
{
while((*str)!=’ ’)
{
if(*str==0x5C)
str++;
usart_send(*str);
str++;
}
}
void usart_send(char data)
{
while(!(UCSRA & (1<<UDRE)));
UDR=data;
}
void gsm_cmd(char *cmd)
{
usart_send_string(cmd);
usart_send(0x0D);
_delay_ms(500);
}
void send_msg()
{
char cmd1[]=”AT+CMGF=1″;
char cmd2[]=”AT+CMGS 
“+923017698646″”;
“+923017698646″”; char msg[]=”msg sent from gsm”;
gsm_cmd(cmd1);
_delay_ms(3000);
gsm_cmd(cmd2);
_delay_ms(1000);
gsm_cmd(msg);
_delay_ms(100);
usart_send(0x1A);
LCD_write(‘S’);
LCD_write(‘E’);
LCD_write(‘N’);
LCD_write(‘T’);
}
int main(void)
{
DDRA=0xff; // making LCD_DATA port as output port
DDRB=0x07; // making signal as out pute
init_LCD(); // initialization of LCD
_delay_ms(50); // delay of 50 milli seconds
init_USART();
send_msg();
while(1);
}