I have one of the 2015 models of the SmartThings multipurpose sensors (labeled “SmartSense Multi designed by SmartThings”) that is giving me problems. I have already tossed the packaging and I am outside the Amazon return window, so I need to figure out if it is defective or if I am using it wrong.
The device appears to work fine initially (I’m only using it to sense temperature), but within ~15 minutes of me putting the cover on it goes OFFLINE (per the device list in the IDE). If I remove the cover it goes back ONLINE almost immediately.
I notice that the cover has a spike in it which appears to be designed to push the button next to the LED. When I remove the cover, the LED shows green for maybe a second (which is consistent with the button being released if you press it manually).
I could rotate the cover 180 degrees so the spike doesn’t push the button, but then if I ever use this as an open/close sensor the mark on the cover that indicates where the magnet should be located will be on the wrong side. EDIT: no, I can’t, as the spike prevents the cover from fully snapping into place
I looked at another one of these sensors - it also has the spike inside the cover, but the LED does not light up when I remove the cover (and the device does not go offline).
What is the purpose of the spike inside the cover?
One difference between the “good” sensor and the “bad” one is that the battery was much easier to insert and remove in the “bad” one (yet I don’t think the battery is momentarily losing contact, as the spring is pushing it upwards against the plastic tab that holds the battery in place).
Having a 15 minute delay between cause (putting the cover on) and effect (going offline) is making this problem really hard to pinpoint.
Any suggestions on what might be wrong?
EDIT: PS - wouldn’t it make more sense, if the device is offline, for it to not report a potentially believable temperature of 73? Something like 0 Kelvin would probably be far enough out of the normal temperature range for the app to then translate it and display “N/A”, which would be a much more obvious indication that the device was dead.