Sure!
The hardware is a board that acts like a keypad with a telnet interface. It's pretty straightforward to install and program, though you will need your alarm panel's installer code (or you can reset it pretty easily). You can actually use the board to subscribe to a monitoring service if you want, It comes with its own cloud service and app (no fees) but I disabled all that with a firewall rule and just use it locally. I still have it professionally maintained and monitored through a local alarm company, just not via the Envisalink board.
https://www.eyezon.com/evl4.php
There are two different versions of the integration, one that runs solely on HE and one that offloads a lot of the work to a third device running NodeProxy. I use the first option. It actually works really well with HSM, though it is a bit chatty. I ended up offloading all of my security rules and integrations to a separate hub, but that doesn't have to be the case.
Here's the envisalink thread:
On my panel I set up the integration to talk directly to HSM, and I can access the sensors on the panel directly, even if the alarm is not armed. It's kind of handy especially since the alarm system's motion detectors are pet-friendly!
