I’m new here, but wanted to share a project I made for my own benefit. It connects older Honeywell Vista alarm systems to Smartthings/your hub of choice via a z wave interpreter. Basically what happens is a z wave module is connected to the hub. When it receives a command, a programmed micro-controller interprets the state and then outputs the correct response for the alarm system. This idea might seem “hacky”, and it is in its early stages (currently allows arm and disarm), but you could expand as you see fit. Basically, this allows you to control these old alarm systems without paying for TotalConnect or buying some high-cost modules for the Vista systems. You can arm/disarm anywhere in the world and also use triggers to do the same. Want to disarm automatically when you arrive home? Done.
I’ve written all of this up on Instructables. Here’s the link!
If you’re interested or have questions, please let me know!