USRIOT USR-N520, User Manual

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UDP Server Test Screenshot
3.1.5. TCP and UDP Comparison
TCP UDP
Advantages Stable, no loss
Reliable connection mechanism
Resend after data sending fails No Connection mechanism, simple, flexible
Suit for small packet and high frequency
Accurate data sending interval
Disadvantages Long packet starting
Jam for small packet and high frequency
Inaccurate interval resulted from check
and resend mechanism More less under bad network environment
3.1.6. HTTPD Client
It is used to transmit data from USR-N520 to HTTP server or gain data from HTTP server.
USR-N520 can handle complex HTTP protocol so user just do programming for serial, and not need to worry
about HTTP.
When USR-N520 sends data to HTTP server via serial port, it only needs to send the header of requested
data; All the returned data will be transmitted by USR-N520, user need to analyze the packets.