Well colour me baffled.
No OnData flickers received either?
Right, delete the Port node so you’re only using RS232. Make sure the device isn’t communicating with any other software.
There is a strong chance the device looks for a software intermediary to unlock data stream. All about the drivers. I’ve been using a device recently where this is the case.
If anyone here is familiar with C# there is a library they can write a plugin with. I’m not that seasoned yet and I haven’t got the device to test and debug with but maybe some around here with the skills will offer a hand. Its a useful bit of kit!
Barring that you can try a little workaround using this. It will send the data to vvvv as midi midiyoke or loopbe will be required too). Its not the prettiest solution but it should get you where you need to go.