Pretty late response, but you have a couple of options. (Best) Open a TCP session in processing to talk using transparent mode to the DigiX. You can test this first using Terraterm where you open a tcp connection to port 8899, this lets you get comfortable with whats happening. You can also visit USR.CN, the source of the DigiX WiFi module and look at USR-VCOM in USR-Software. This looks to be a virtual serial port driver which hides the use of TCP and port 8899 to emulate a COM port so you open it like you are doing now. I have not tested this or can speak for the quality but the price is right (free). I also assume this is for some version of windows. There are also other virtual com port drivers out there for other OS's. Again, the best is to just use TCP.
