Ok, what panel do you have ? (e.g.: NX8E or NX6v2 etc)
Availability (and pricing) should be good for a system that already has a serial port. The unknown that I need to look into is availability and pricing of the serial port module for panels other than the NX8-E
I’ll put together some instructions over the next few days to a week or so, and work out pricing too (dependent on whether your panel already has a comms port)
I have it working so you get a SmartThings device where you can arm the alarm in either ‘exit’ or ‘stay’ mode (I haven’t enabled ‘disarm’ since that seems a little lacking in security, but can add it if desired), and you can see the status of all zones.
You also get child devices for all alarm zones (which update even when bypassed) which can be used to drive smartthings automations. (e.g.: turn on a light when the motion sensor is triggered, etc).
I’ve also set it up so that you can trigger an unused alarm zone (if you have one) to be triggered via smartthings (e.g.: so that you can use smartthings devices, or a WebCoRE script etc, to trigger an alarm zone). I have it set so that turning on or off any lights via Z-wave switches, while the alarm is set in Away/Exit mode will trigger a zone.
Using WebCoRE to react to alarm status I have it set so that some exterior house lights will flash when the alarm is triggered (flashing them every second may wear out the relays in the switches, but that’s a small price to pay for drawing attention to the fact that someone broke into the house)
I also have Alexa integration working so that, for example, I can say “Alexa, Set House Alarm Exit” before I leave the house for it to set the alarm, rather than having to walk to the keypad.