#include <stdio.h>   /* Standard input/output definitions */
    #include <string.h>  /* String function definitions */
    #include <unistd.h>  /* UNIX standard function definitions */
    #include <fcntl.h>   /* File control definitions */
    #include <errno.h>   /* Error number definitions */
    #include <termios.h> /* POSIX terminal control definitions */



int main(int argc, char **argv){
	int fd;
	struct termios options;
	char buffer[128];  /* Input buffer */
	int  nbytes;       /* Number of bytes read */
	int  tries;        /* Number of tries so far */
	
	fd = open("/dev/ttyUSB0", O_RDWR | O_NOCTTY | O_NDELAY);
	fcntl(fd, F_SETFL, 0);
	if (fd == -1)perror("open_port: Unable to open /dev/ttyUSB0 - "); fcntl(fd, F_SETFL, 0);

	 /* get the current options */
	tcgetattr(fd, &options);

	options.c_cflag &= ~PARENB;
	options.c_cflag &= ~CSTOPB;
	options.c_cflag &= ~CSIZE;
	options.c_cflag |= CS8;

	options.c_iflag &= ~(IXON | IXOFF | IXANY);
	options.c_oflag &= ~OPOST;

    /*
     * Set the baud rates to 19200...
     */

	cfsetispeed(&options, B19200);
	cfsetospeed(&options, B19200);


	 /* set the options */
	tcsetattr(fd, TCSANOW, &options);

	for(;;){
		nbytes = read(fd,&buffer,sizeof(buffer));
		printf("nbytes = %i; buffer = %32.32x\n",nbytes,buffer);
	}

	close(fd);
	return 0;
}