主从机之间建立网络通信。当主从机通过IP地址建立连接之后，可以互相收发信息。-Established between the master and slave network communications. When the master and slave connection is established through the IP address, you can send and receive messages to each other.

串口通信，实现两个单片机的通信.主从机通信-Serial communication, to achieve two single-chip communication. Master-slave communication

主要实现RS485 的主从通信。比较实用-The main achievement of the master-slave RS485 communication. More practical