I created a SmartThings device handler that integrates nicely with EnvisaLink/Eyez-On and allows you to automate the arming/disarming of your DSC home alarm system via SmartThings routines, Alexa, etc. It’s super easy/quick to setup and doesn’t require any additional hardware beyond your EnvisaLink and SmartThings hub. I’ve been test driving it myself for several months now and it’s been working wonderfully.
You can find the project here: https://github.com/vadim-bach/EyezOn-SmartThings-Switch. I’m hoping you guys will benefit from it as much as I have. Enjoy and let me know what you think!