Tcp Client; Udp Server; Udp Client - Ebyte NB124E User Manual

Dual serial port server

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4.4.2 TCP Client

When the device is working, it will actively initiate a connection request to the server and

establish a connection to realize the interaction between serial port data and server data.

To use the client, you need to configure the IP address/domain name and target port of the target

accurately.

The two channels can independently open 2-way TCP clients.

UDP Server means that the device does not verify the source IP address of the data when using

the UDP protocol to communicate. After receiving a UDP data packet, it saves the source IP address

and source port of the data packet, and sets it as the target IP and port, so The data sent by the device

only sends data packets to the source IP address and port where the device received the data last

time.

This mode is usually used in scenarios where multiple network devices communicate with this

device, and the frequency is high, and the TCP Server cannot meet the conditions.

Using UDP Server requires the remote UDP device to send data first, otherwise the data cannot

be sent normally.

【Note】In UDP mode, the data sent by the network to the device should be less than 512Bit per packet, otherwise

it will cause data loss.

UDP Client is a connectionless transmission protocol that provides transaction-oriented simple

and unreliable information transmission services. There is no connection establishment and

disconnection, and data can be sent to the other party only by configuring the destination IP and

destination port. It is usually used in data transmission scenarios where there is no requirement for

the packet loss rate, the data packets are small and the sending frequency is fast, and the data is to be

transmitted to the specified IP.

In UDP Client mode, the device will only communicate with the configured (target IP and target

port) remote UDP device.

In this mode, the destination address is set to 255.255.255.255, and the sending data will be

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NB124E_User Manual

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