The house I bought has an old hard wired alarm. The manual is dated 1989, it's an Ademco Vista 4130xm, 4140xm series. Either the motion detector or alarm panel is having issues. If I set it to "stay (motion sensor doesn't arm)", it decides on it's own to go to "away (motion sensor arms)" sometimes at night (it gives us a chime warning when this happens). My son triggers the motion sensor to disarm the panel on the 1st floor, so we tend to almost never set the alarm to "away" at night, but we should. So the current sensor location needs to move. I also feel there's a big "gap" in motion sensor coverage that I think a 2nd sensor would correct. My motion sensor is above the front door/garage entry and points to the hallway/stairwell and a portion of the LR. If you broke in via a back window w/o opening an entry door, you could walk through my DR, Kitchen, Family Room, basement and part of the LR without being detected. I figure it's time to consider replacing this one with a wireless unit instead of repairing the control panels(2), motion sensor and backup battery (it's dying). Wondering if anyone has done a wireless install that they would recommend. I really just want to monitor the 1st floor, I have 5 entry doors (front,garage,basement,back,family)door if you include the cellar and 2 motion sensors should be plenty to cover it all. Also, I don't need to have this connected to a central monitoring service either. Any recommendations?