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the connection success the server will go on the duplex data communications.
2.UDP mode
UDP protocol is unreliable connectionless protocol, data transmission is not required to establish a
connection, do not need to receive confirmation form the host for data transmission, so the UDP
protocol does not guarantee the data sent to the target host packets are received correctly, for high
reliability requirements of the occasion can use the higher level of communication protocol to
ensure data is correct.
UDP is a relatively simple way of communication, it will not increase too much extra traffic, it can
communicate faster than the TCP to provide real time communication. UDP does not need the
server and client, both parties are on equal communication.
Our Ethernet to serial communication module using UDP mode including: UDP Uni_Cast, UDP
Multi_Cast.
UDP unicast (UDP Uni_Cast) mode:
Module in the UDP Uni_Cast mode, it can be point to point duplex data transmission, although it
can send data to several other hosts, but only one host can send data to the module back .
UDP Multicast (UDP Multicast) mode:
The modules in the network use the multicast ID is one between 224.0.0.0-239.255.255.255
address as its multicast group address, all the modules in the multicast network can be duplex data
transfer, and no master slave distinguish, This mode is easy for old RS485 network upgrade to
Ethernet.
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