Get a DSC power series (not the neo series) alarm and an Envisalink module and it works with Smartthings, the below website will just supply or also install if you want:
http://www.thesecuritystore.uk.com/
Then when thats done you just need to follow the instructions on the forums to get it linked to your Smartthings hub.
There are a million threads about this, and I figured I should start my own. I’ve compiled code from 3-4 people here and will give them credit. This set up allows arm/disarm via local LAN so you do not have to worry about https, security, and port forwarding. It creates all devices, you only need device types for contact, motion, smoke, and co2. Very simple, and easy. If you have a raspberry pi you can host alarmserver on it and have this running much much quicker and easier than any other dsc integration method.
This is from @sanity , @xero , @ethomasii , @jtt , @rfish8u , @mattmartz , and countless others I"ll name as I remember. If you’re experienced in setting this up you can skip directly to the devices, smartapp, and alarmserver and be good to go. For new users, view the advanced r…