Hello. It's need to add Ethernet connection to my project, I try to use ch9121.
I found some information here how to config this module, but can't find any example how to make POST request. If anyone works with it – please help. Thanks!
Unfortunately the information on the Net about this module is very limited. From the information I found I would guess that you configure the module to exactly one connection (using configuration mode and once you leave that mode it tries to establish a connection to the defined target. This isn't really suited to do HTTP requests. It seems to be a product to establish a serial connection over a TCP/IP network by having such a device on both ends of the network path. It doesn't seem to be intended to be used for a more general network access.
So why did you choose that module? Are you open for alternatives? What are you trying to achieve?
Yes, of course, it's can be alternatives. It's need to send POST data from Arduino over Ethernet. What modules can you recommend?
Arduino Ethernet Shield is probably the best option for the Arduino UNO.
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