Udp Client Function; Udp Server Function - Ebyte E180-DTU User Manual

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number of connections can be customized). The local port number is a fixed value and cannot be set to 0.

(4) TCP Server can set the maximum number of connections. When the maximum number of connections is

reached, user can choose to kick off the old connection or prohibit the establishment of new connections according to

the configuration through commands.

3.2.4 UDP Client Function

(1) UDP Client is a disconnected transmission protocol that provides transaction-oriented simple and unreliable

information transmission services. There is no connection establishment and disconnection, only the IP and port are

required to send data to each other. Usually used for data transmission scenarios where there is no requirement for packet

loss rate, data packets are small and transmission frequency is fast and data is to be transmitted to the specified IP.

(2) In UDP Client mode, E180-DTU (ZG120-ETH) only communicates with the target port of the target IP. If the

data is not from this channel, it will not be received by E180-DTU (ZG120-ETH).

(3) In UDP Client mode, if the destination address is set to 255.255.255.255, it can achieve the effect of UDP broadcast

on the entire network segment, and it can also receive broadcast data. E180-DTU (ZG120-ETH) module supports

broadcasting within the network segment , such as xxx.xxx.xxx.255 broadcast mode.

(1) UDP Server means that the source IP address is not verified on the basis of ordinary UDP. After receiving a UDP

data packet, the destination IP is changed to the data source IP and port number. When sending data, send to the IP and

port number of the most recent communication.

(2) This mode is usually used for data transmission scenarios where multiple network devices need to communicate

with the module and do not want to use TCP due to the fast frequency.

Note: UDP Server cannot send data actively. Only after receiving the data can it send data to the IP and port that have

E180-DTU(ZG120-ETH)User Maunel

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