Tcp Server Mode Characteristic; Tcp Client Mode Characteristic - Ebyte E810 User Manual

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Chengdu Ebyte Electronic Technology Co., Ltd.

E810-DTU(4RS1E) User Manuel

4.1. TCP Server Mode characteristic

Diagram 4-2 TCP Server

(1) TCP Server is TCP server. In TCP Server mode, E810 (4RS1E) monitors the local port. It accepts and establishes a connection

for data communication when there is a connection request. When E810 (4RS1E) serial port receives data, it will send the data to

all client device that have established the connection with it.

(2) It is usually used for communication with TCP clients in LAN. It is applicable for the scenario where there is no server in

LAN and there are multiple computers or mobile phones requesting data from the server. Like TCP Client, there are differences

between connection and disconnection to ensure reliable exchange of data.

(3) When E810 (4RS1E) is used as TCP Server, it can accept a maximum of 6 Client connections. The local port number is a fixed

value and cannot be set to 0.

Diagram 4-3 TCP Client

(1) TCP Client provides client connection for TCP network services, actively initiate a connection request to the server and

establish a connection, which is used to implement serial port data and server data interaction. According to the relevant

provisions of TCP protocol, TCP Client is distinguished from connected and disconnected, thereby ensuring reliable exchange of

data. It is usually used for data interaction between the device and the server and the most commonly used network

communication method.

(2) When E810 (4RS1E) attempts to connect to the server in TCP Client mode and the local port is 0, the connection is initiated

through a random port each time.

(3) This mode supports short connection function.

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