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USR IOT USR-N540 User Manual

USR IOT USR-N540
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USR-N540 User Manual www.usriot.com
Jinan USR IOT Technology Limited 24 / 73 inquiry@usriot.com
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-N540 to HTTP server or gain data from HTTP server.
USR-N540 can handle complex HTTP protocol so user just do programming for serial, and not need to worry about
HTTP.
When USR-N540 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-N540, user need to analyze the packets.
Test Example
1) Entry http://192.168.0.7 (N540s IP) to open its web page
1. Set USR-N540 as HTTPD Client.
2. Set HTTPD packet Header.

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USR IOT USR-N540 Specifications

General IconGeneral
BrandUSR IOT
ModelUSR-N540
CategoryServer
LanguageEnglish

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