Here's a short video by Ross-Tech that shows how to set-up the WiFi on a new Ross-Tech HEX-NET interface. You'll need to know the name of your WiFi network and its password

It only takes a couple of minutes to do and once you've added the HEX-NET to your WiFi, you can use it via the normal USB cable, or over WiFi by opening the VCDS options page and choosing NET in the "Select Port"