Linking to Russound ST2?

New to OH and apologize if this is posted in the wrong area. I have a Russound ST2 that I am trying to link to OH via serial. The Russound binding is expecting a Russound controller, I believe, so connecting directly to the ST2 doesn’t seem to be an option. Russound uses hex through the serial port so I don’t believe the serial binding will work either.

Has anyone connected a stand-alone ST2 or does anyone have a suggestion how I may attempt this?

Thanks in advance for any suggestions.