We have ST Arrival Sensors in our boys’ backpacks so we know when they arrive home from school.
The problem: On occasion, when the backpacks are just sitting at home, they’ll mysteriously ‘depart’, and then ‘arrive’ again almost immediately. (The backpacks will not have moved.)
That’s obviously an annoyance. Even worse, though, is that the arrival will trigger SHM to disarm if we’re not home.
- Their usual storage place (our back door) is in close proximity to the hub – there are no architectural barriers
- They work almost flawlessly for sensing real arrivals – with an impressive range (the sidewalk in front of our house)
- So . . . I can’t for the life of me figure out why they mysteriously depart and then return on their own. (It’s not an issue of range or signal.)
If it’s not range to the hub or architectural interference, what might be causing this?
Whenever they erroneously “depart”, they show up as returning almost immediately. There’s never a timelag between departure and arrival when these misfires happen. Is there any way to set up rules so that an Arrival Sensor can’t “arrive” unless it’s been gone for a minimum amount of time? (e.g. set it so that the arrival sensor cannot detect an arrival unless ST knows that it’s been gone for at least 10 minutes – which would fix my problem!?)