That is a HomeWorks Interactive RF only processor.
That sounds like a 3000 series Grafik Eye. Look for a GRX-3100 or a GRX-MR3 (same unit, different model number)
Unfortunately, that processor does not have an Ethernet connection. I have seen some Ethernet to RS232 devices. It's just a matter of finding one you are comfortable with or can find someone to program.
If you have the software you can print a bill of materials. The software is only available to dealers. If you call Lutron they might give you a copy since it is 3 or 4 generations old.