If you haven’t had a chance to use custom code with SmartThings, it’s pretty straightforward. Basically just copy someone else’s code into your own account. Here’s the FAQ for that.
Mike Maxwell has an excellent zone manager for SmartThings which allows you to assign multiple sensors to one zone and then take action off of that. Very significantly reduces the number of false alarms. This is discussed in the outdoor motion sensor FAQ so you’ll see a lot of people are using it, but here’s the direct link:
You should be able to set it up in a few minutes.
Mike even has a really cool universal device type handler which let you have one device report as a different kind, so you could even set up a zone with one contact sensor, the pressure Mat, and two motion sensors.
Quickest way to find that is to use the quick browse lists in the community – created wiki and look for sensors under DTHs.
