Raspberry Pi to passively monitor alarm panel?

[ritchierich (Michael)]

ThingShield is back in stock!

Agree with JD, Alarm Decoder makes a product that basically acts as another keypad on the alarm. They even have a complete solution with Pi too:
http://www.alarmdecoder.com/catalog/product_info.php/products_id/39/osCsid/2jhl2ie35igate9ej6vjactsb0

Or you can try the AD2Pi hooked up to an Arduino with a ST ThingShield:

AD2SmartThings

#AD2SmartThings# ##Integrate Your Honeywell or Ademco Alarm Panel Into Your SmartThings Physical Graph## ADT / Honeywell / Ademco / Vista / Alarm / SmartThings / Alarm Panel / Home Alarm ###A project by Stan Dotson and Michael Ritchie### Wish you could use your existing home alarm sensors with SmartThings? Do you hate the hassle arming your panel and having to rush to disarm? Wish you could control your alarm panel on our smartphone but dont want to pay the higher monthly service bill? Do you want to install another keypad and don’t want to deal with your alarm company? Do you have an alarm panel and never use it? This is a relatively simple project that effectively integrates your Honeywell or Ademco alarm panel with SmartThings. These panels are typically installed by ADT or other a…