This app and drivers will let you communicate with an Interlogix/Network alarm system using a WiFi bridge device developed by LeeF Automation.
Hardware details can be found at the SmartThings community discussion: GE, Networx, Interlogix Caddx NX8 security System Integration? - Devices & Integrations - SmartThings Community and hardware is available by contacting user LeeFL there.
I adapted LeeFL's original SmartThings code to operate with Hubitat, and posted my code on github: GitHub - michaelvandam/Networx-Alarm-System-Bridge.
This is still a work in progress and doesn't yet have a nice installation/setup GUI, but this is something I may work on if there is interest. In the meantime, I have included detailed setup instructions in the README file. I have tested this code and regularly use it myself.
Please feel free to contact me if you have any questions or suggestions!
I'll post any major developments to this thread.