Okay, so after months of smooth sailing, my Aqara motion sensor just… stopped. No motion, no nothing. I’m running a mixed setup with HomeKit and a Home Assistant bridge, and suddenly the motion sensor decided to take a nap and not wake up. Thought I’d lost it for good.
But here’s what actually worked for me:
- Battery wasn’t dead, but I swapped it anyway. Fresh CR2450, no harm.
- Unlinked it from the hub completely and re-added it from scratch. Yeah, annoying, but worth it.
- Placement mattered more than I thought. Turns out it was barely in range—moved it closer to my M2 hub and boom, back to life.
Also, if you’re running automations via HA and suddenly the sensor vanishes, check your entity IDs didn’t change. Mine did after re-pairing and it broke a few of my automations until I updated them.
Has anyone else had random drops like this? Wondering if it’s just me or a known thing. Would love to hear your hacks or setups to keep these little guys online 24/7.
@IsabellaRodriguez Thank you for sharing your experience with the Aqara motion sensor! It sounds like you went through a lot to get it back on track, and I’m glad to hear your efforts paid off. The steps you took align closely with some common troubleshooting methods for Aqara motion sensors. Here’s a quick recap and additional insights that might help others:
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Battery Replacement: Even if the battery doesn’t seem dead, replacing it with a fresh CR2450 can sometimes resolve issues, as you experienced.
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Re-adding the Sensor: Unlinking and then re-adding the sensor to the hub can reset any glitches. This step is indeed a bit tedious, but as you noted, it can be quite effective.
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Placement and Range: Placing the sensor closer to the hub was a smart move. As noted, being out of range is a common issue that can disrupt the connection.
Additionally, it’s worth noting that if you’re using automations with Home Assistant, checking and updating entity IDs after re-pairing is crucial, as they might change and affect your existing setups.
For anyone else experiencing similar issues, these steps are a great start. Also, if a motion sensor reports motion detection when no one is present, consider checking for heating objects or large temperature differences in the detection area, which can interfere with infrared detection.
If others have additional tips or setups to ensure these sensors stay online consistently, it would be great to hear more! Let’s keep the discussion going and support each other in getting the best out of our smart home gadgets.