Sven Brauch wrote: > I don't make any other changes to the default settings. To be honest, > I'm not sure in which mode it is operating then (I was assuming raw, but > I might be wrong?). You should explicitly set a mode if you need a particular mode, otherwise the port might be in another mode. This sets raw. Add error checking. struct termios t; tcgetattr(fd, &t); cfmakeraw(&t); cfsetspeed(&t, B115200); tcsetattr(fd, 0, &t); //Peter -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html