ST Multi sensor open/close sensitive goes off a cliff

[Simon_Goldberger]

Is it just me or has anyone else seen the open/close sensitivity of their ST Multisensor drop off a cliff?

I’ve been using one on our letter box to announce the arrival of mail…

It’s slightly back set between sensor and magnet but it’s been happy for almost two years with all necessary pulling apart for battery changes etc… but now suddenly it’s only reporting closed if pulled off the door and held to magnet…

We have a second identical one for door open close so my solution was as easy as swapping the two sensors over.

The second sensor is more than happy in the letter box location and is reporting properly… so here we have one of a pair of sensors whose sensitivity has suddenly dropped for no apparent reason…

And yes did stick a new battery in to check that first and both on same firmware…

[ero4444 (Eric)]

stronger magnet might workaround this issue. Not hard to move it closer, either.

Thanks for the datapoint. Too many open issues with this sensor that looks good on paper.

[Simon_Goldberger]

Nods both good solutions… We were lucky enough to have two sensors i could swap over, which solved our issue

But it also proved out the case that its just the one sensor which has suddenly lost sensitivity…

Was thinking it might be caused by firmware change (seen previous complaints of them bring to sensitive) but nope as both sensors are on same firmware.

So bit of a weird one