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May 13, 2012
about 3 years ago
After some more detailed investigation, UDP packets can be received if and only if the local and remote ports are the same! Ports can be different starting two UDP connections to the same address but with different ports. No progresses for TCP server sockets!
I am evaluating this shield to deal with UDP servers for M2M applications.
I started to test TCP and UDP sockets using AT commands described into Spreadtrum/Sendtrue datasheets, unfortunately it seems that UDP packets cannot be received by the data module, even if the local port for this purpose has been defined by the command AT+SDATACONF.
I’m sure that it works with some more information on how to correctly set the UDP socket, same as for TCP listening sockets that seem not supported by the SM5100B-D data module.
Can SparkFun contact the manufacturer in order to provide the AT commands for a full UDP and TCP sockets deployment?
Thank you in advance.
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