c - 如何通过C-Linux向串口发送AT命令

Question

当然有termios.h，不过这里我说的是AT命令。我希望他们被处决。

如何在 Linux 中通过 C 向串口发送 AT 命令并执行？

Answer 1

看看这个简短的例子(它有效):

struct termios options;
int fd;

fd = open("/dev/ttyS0", O_RDWR | O_NOCTTY | O_NDELAY);

if (fd < 0)
{
    printf("Error opening serial port\n");
    exit(1);
}

bzero(&options, sizeof(options));
options.c_cflag = B9600 | CS8 | CLOCAL | CREAD | IGNPAR;
tcflush(fd, TCIFLUSH);
tcsetattr(fd, TCSANOW, &options);

if (write(fd, "ATZ\r", 4) < 4)
{
    printf("Write error - %s \n", strerror(errno));
    exit (1);
}

// read back for OK or KO then do your stuff...