There are a lot of posts on the internet concerning this station’s interface, some of them from very experienced users/programmers but none of them claiming success. Like some other OS station(s) it appears to use the serial connection in a non-standard way, most likely by using the control lines for data so a regular USB or Serial port monitoring software will not yield any usable information 
I have seen information that it uses the silabs USB-Serial chip so I guess it’s also possible the interface may be similar to the Davis USBxpress one :dontknow: