I use the Hubitat to talk directly to my Elk M1 panel. All zones, relays, etc, are all available to me for rules and tasks. I can run lights off of zones that trip, front door light turns on after dark if the front door zone is opened, etc.
I started here. I have the Hubitat C7 hub and various light switches and Zooz relays as well.
https://community.hubitat.com/t/release-elk-m1-integration/24664