I just wanted to update, I came across a hardwire module for The Honeywell Vista panels, made by Honeywell/Residio called the 4232CBM. This is a serial ontrol4 device. This module connects to the keypad bus and has an RS232/422 wiring connection. You could add an ethernet to serial adapter to this and connect to Hubitat through the local network. The panel compatbility is Vista 10, 15, 20, and 21 panels. The module does not include the driver or documentation so one would need to be written.
Another module I found was the HouseLogix HISM. This is also a Control4 device. It appears is is owned by SnapAV. Again a serial device. It appease to work on Vista and DSC products. It appears to come with a driver when purchased. The panels it lists as compatible, PC1864, 1832, 1616, 1404 DSC PowerSeries Control Panels, Honeywell LYNX Plus 3000, VISTA-21iP, VISTA-128BPT Series/VISTA Turbo Series, VISTA-128FBP, VISTA-250BPT/VISTA Turbo, VISTA-250FBP, VISTA-10P VISTA Plus Series, VISTA-10SE, VISTA-15, VISTA-15P VISTA Plus Series, VISTA-20P VISTA Plus Series, VISTA-20PUL Commercial, VISTA-50PUL, VISTA-20SE, VIA-30PSE, VISTA-128B, VISTA-128BP Series, VISTA-40, VISTA-50P, VISTA-250BP, First Alert FA-168C and other First Alert rebranded Panels, Safewatch 3000 Panels.
