Exhange data beween 2 wizfi250 in udp mode

Question

I am trying to establish a network with 2 of these modules. I have them on evaluation boards. I need to be able to exchange serial data between them in udp mode, where one is a udp server and the other is a udp client. They will be connecting to each other only, and not to an existing wifi network. I am only able to communicate with them using AT commands using a usb cable. I have tried following the examples in the data sheet, but have not found a way to set up the network. I usually get [ERROR: WiFi Status] to the AT commands I have used. I am quite happy to work through the data sheet and work out the details, but I dont know what the basic steps are.

ssekim · Answer

Hello Anglial Did you use <AT+SCON> command? If so, before issuing the command, WizFi250 should be associated to a AP(or another WizFi250). Can you let me know the all at command sets which you used?

anglial · Answer

I tried these to set up the server ready for the other to connect at+scon=so,usn,5000,0 [ERROR: WiFi Status] at+scon=so,usn,5000,1 [ERROR: WiFi Status] at+scon=o,usn,5000,0 [ERROR: WiFi Status] at+scon=o,usn,5000,0 [ERROR: WiFi Status] at+scon=o,usn,5000,1 [ERROR: WiFi Status] I then read the data sheet to see how to connect two together without using an AP and could not find an example so I asked here.

kaizen · Answer

Hi You have to use command after entering the command. [ERROR: WiFi Status] response means WizFi250 does not connect to your AP.

anglial · Answer

So do I need to set one of them up as an access point, then get the other one to connect to it ? How do I do that ? I have tried using AT+WSET but I’m not sure what I am doing and there are no examples to follow to do this. In what order do I need to use the commands at each end ? Thanks for your help

ssekim · Answer

Hello anglial Here is my scenario. Module A : AP mode, 192.168.12.1, TCP Server, Module B : Station mode, 192.168.12.2, TCP Client [AP mode setting in Module A] AT+WSET=1,WizFi250_AP AT+WSEC=1,WPA2,12345678 AT+WNET=0,192.168.12.1,255.255.255.0,192.168.12.1 AT+WJOIN [Station mode setting in Module A] AT+WSET=0,WizFi250_AP AT+WSEC=0,WPA2,12345678 AT+WNET=0,192.168.12.2,255.255.255.0,192.168.12.1 AT+WJOIN Now, module A and module B are in a same network. [TCP Server setting in Module A] AT+SCON=O,TSN,4000,1 [TCP Client setting in Module B] AT+SCON=O,TCN,192.168.12.1,4000,1 Now, module A and module B can communicate each other. Regards, Steve

anglial · Answer

Thanks, thats a great help. I have used these commands to open a udp connection : AT+SCON=O,USN,4000,0 udp server module A, command mode AT+SCON=O,UCN,192.168.12.1,4000,0 udp client module B, command mode If I want to send data from the client to the server using the AT+SSEND command how do I use it ? The definition on page 15 of the programmers guide is different to the example on page 72. Is the timeout necessary ? Is a character required before the text data ? Please could you post an example of the AT+SSEND command that will work in this example. I am confused. Thank you

ssekim · Answer

There are some description and some examples about AT+SSEND. [url]http://wizwiki.net/wiki/doku.php?id=products:wizfi250:wizfi250pg:start#at_ssend[/url] [url]http://wizwiki.net/wiki/doku.php?id=products:wizfi250:wizfi250pg:start#method_of_setting_tcp_client_and_exchanging_data_in_command_mode[/url]