sending AT commands to wavecom through C code
 

Hi all,

I am testing sending sms through wavecom modem.

I tested with minicom, its responding correctly..

commands are
AT
OK

AT+CMGS="mobilenum" (then press Enter key)
>"message" (then press ctrl+z)

its sending sms properly.

Same thing i want to implement using a code.

I am able to open serial port and done initialization


now i want to send AT COMMANDS to wavecom modem using C code.

can any one provide sample code for this.(In this how to include Enter key and Ctrl+z keys.)



Thanks in advance


nathan

We'll be glad to help you with what you've written. Post what you've written so far, along with what error(s) you're getting, and some information about your hardware and version/distro of Linux, and we can help.

But I doubt that anyone is going to write code for you...also, there is LOTS of sample code on the Internet, for serial communication. Have you checked?

Hi,

Here i am pasting my code.
1).

I am using read and write commands? is it proper way of using ?
any other method, instead of using read and write commands?

kindly suggest me where i went wrong.

int main()
{
unsigned char char1[10];
unsigned char char_buf[8]="AT+CSQ\n";
// unsigned char sms_buf[20] = "AT+CMGS="xxxxxxxxx";

int wc_fd;
/********* Init of serial port ************/
wc_fd = init_wc(wc_fd);
sleep(3);
//writing to serial port
write(wc_fd,char_buf,sizeof(char_buf));
usleep(40000);
//reading from serial port
read(wc_fd,char1,sizeof(char1));

sleep(2);
close(wc_fd);

return 0;
} // end of main

// initialization of serial port

struct termios options;

ttys5_fd = open("/dev/ttyS5", O_RDWR );
if (ttys5_fd < 0)
{
printf("\nFail to open serial port 2\n");
return 0;
}
init_tty( ttys5_fd ,BAUD_RATE);
return ttys5_fd;

-----------------------------------
//initializing baud rate
int init_tty( int fd ,long wBaud)
{

long baud;

switch (wBaud)
{
case 9600:
baud = B9600;
break;
case 19200:
baud = B19200;
break;
case 38400:
baud = B38400;
break;
case 57600 :
baud = B57600;
break;
case 115200:
baud = B115200;
break;
default:
return 0;
break;
}

options.c_cflag = baud | CS8 | CREAD | CLOCAL;

options.c_cflag &= ~HUPCL;
options.c_lflag = 0;

options.c_iflag = IGNPAR;

options.c_oflag = 0;
options.c_cc[VTIME] = 0;

options.c_cc[VMIN] = 0;

tcflush(fd, TCIFLUSH); /* flush the buffer */

/* apply the settings */
if(tcsetattr(fd, TCSANOW, &options) < 0){ /* apply the settings */
printf("initport: Error in setting serial port params in non-canonical mode\n");
return (-1);
}
else{
return 1;
}
}