USR-N540 User Manual www.usriot.com
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1) Base on normal UDP, it doesn't verify source IP address. Every time USR-N540 receive one UDP data packet, it
changes destination IP to where data comes and it sends the data to the IP and port which communicate
latest.
2) Test Example:
① Open “USR-TCP232-M4_ E45 Setup” Software: Set USR-N540 as UDP Server, local port: 23.
② Open “USR-TCP232-TEST” Software twice. Set work mode as UDP, remote IP and port same with USR-N540’.
Click “Send” then the COM receive data.
Click “Send” at serial side, only the software communicate latest can receive the data.