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The original was posted on /r/homeassistant by /u/beculet on 2025-03-09 06:11:39+00:00.
I know a lot of people around here praise them but my experience with them is just rubbish.
To give some context, most of my sensors are either Tuya TS0203 or Tuya WL-19DWZ and they work great but they are too big to fit in the space between the frame of the window and the wall for some use cases.
No worries I said, I'll get IKEA ones. Yes, they cost more, but I only need two and they are slimmer so they will fit.
Well, they are slimmer and they do fit, but don't work just as well. Both of the ones I have constantly stop reporting their state. Sometimes the LED does turn on, like it's transmitting, but nothing reaches the controller. Other times the LED doesn't even turn on.
To get them working again I have to take out the battery and that isn't as easy as with other sensors since it has a screw to keep it in place.
I have a friend who just threw out 5 of them since he had similar issues, not to mention that at one point one of them kept sending the status every second (the LED was just red) spamming the network and also draining the battery.
I'm writing this in the hopes that when people search this subreddit for them they will not only see the good posts but also know that some of us had pretty shitty experiences with IKEA E2013.