This thread scared me (especially since my wife also left the garage door open by accident that same week!), so I added sensors for my garage last month.
Since my garage door opener was installed with cat5 (I think most new homes are like this): I used the existing cat5 cable that went from each of the garage door openers obstacle sensors to the garage door opener and patched it into the cat5 cable that went to the wall mounted opener switch. This let me add two magnetic door sensors (one one each side of the garage door, wired in series) without having to fish wire to the garage door (which would have been difficult since my garage walls are finished). I did have to fish some cat5 from the opener switch to my Elk panel, but this wasn't too hard. The unused cat5 wires made things very easy.
I also added a dual technology PIR that uses microwave plus IR and haven't received any false alarms (any motion in the garage is announced whether the system is armed or not). This is very surprising since the PIR faces the garage door (which is aluminum).
I now have an announcement that is made every few minutes when the garage door is left open, however, I haven't added the ability to open/close the door (this would be very easy since I have spare conductors ran now). How useful is this ability? I'm kind of paranoid that someone with internet access armed with my ip address/username/password could open my garage door... Any thoughts about this?
Since my garage door opener was installed with cat5 (I think most new homes are like this): I used the existing cat5 cable that went from each of the garage door openers obstacle sensors to the garage door opener and patched it into the cat5 cable that went to the wall mounted opener switch. This let me add two magnetic door sensors (one one each side of the garage door, wired in series) without having to fish wire to the garage door (which would have been difficult since my garage walls are finished). I did have to fish some cat5 from the opener switch to my Elk panel, but this wasn't too hard. The unused cat5 wires made things very easy.
I also added a dual technology PIR that uses microwave plus IR and haven't received any false alarms (any motion in the garage is announced whether the system is armed or not). This is very surprising since the PIR faces the garage door (which is aluminum).
I now have an announcement that is made every few minutes when the garage door is left open, however, I haven't added the ability to open/close the door (this would be very easy since I have spare conductors ran now). How useful is this ability? I'm kind of paranoid that someone with internet access armed with my ip address/username/password could open my garage door... Any thoughts about this?