Function at_vprintflf

components/net/at/src/at_utils.c:113–128

    return at_utils_send(device, 0, send_buf, len);
}
rt_size_t at_vprintflf(rt_device_t device, char *send_buf, rt_size_t buf_size, const char *format, va_list args)
{
    rt_size_t len = vsnprintf(send_buf, buf_size - 1, format, args);
    if (len == 0)
    {
        return 0;
    }

    send_buf[len++] = '\n';

#ifdef AT_PRINT_RAW_CMD
    at_print_raw_cmd("sendline", send_buf, len);
#endif

    return at_utils_send(device, 0, send_buf, len);
}