本文主要说明某些简易 Linux 环境或者嵌入式 Linux 中实现串口上网的简单实现，这在工业控制中有着广泛的应用。希望对实现无网卡设备上网的方法有抛砖引玉的作用-This article illustrates some of the simple embedded Linux in the Linux environment or a simple implementation of Serial Internet, which has a wide range of industrial