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Sonoff Motion Sensors - These are Really Bad (lemmy.world)
submitted 2 years ago by corroded@lemmy.world to c/homeassistant@lemmy.world
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I installed 6 Sonoff SN-ZB03 motion sensors this morning, and I'm getting so many false positives that they're essentially useless. I could understand having one that's bad, but 6?

Three of them seem to randomly trigger for no reason at all. One triggers any time the heater comes on, regardless of where I place it. The last two usually work but still give random false positives.

From what I'm reading, there are a lot of complaints about these. I probably should have done some research before I bought them. I can't shake the feeling that I'm doing something wrong. Is ITEAD really selling a motion sensor that just doesn't work properly?

I don't see any commands listed under "Manage Zigbee Device" that allow for a sensitivity change, and I can't find a datasheet or a manual for these other than the basic "quick start" guide. As far as I can tell, there's no firmware update available, either.

Am I stuck replacing all of these? If so, any suggestions on better ones? I've read good reviews of the Hue motion sensors, but they're not cheap.

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[-] joe_archer@feddit.uk 5 points 2 years ago

I moved all of my movement/presence sensors to mm wave RADAR, they're relatively cheap and much more reliable than PIR.

[-] Kuro@feddit.de 3 points 2 years ago

Which ones are you getting? I am looking for mm wave with zigbee. Can you recommend one?

[-] CmdrShepard@lemmy.one 3 points 2 years ago

I've been looking for a year or two and the selection is pretty limited for off the shelf solutions. Most are $60+ each like the FP1, the Tuya options, or the one from the EverythingSmartHome youtube guy.

I've given up on having presence detection for the time being as PIR definitely doesn't cut it, though hopefully that guy responds with his DIY solution as I also have a 3D printer and electronics experience.

[-] joe_archer@feddit.uk 1 points 2 years ago

I build my own using EspHome. I tend to use a D1 Mini as the microcontroller as it has a small footprint and a LD2411S sensor module (very cheap on AliExpress ) I'm lucky enough to have a 3d printer to make my own enclosures.

[-] Bluesheep@lemmy.world 1 points 2 years ago

Got any project details for that? A BOM, or even a link to an enclosure on things or printables?

[-] joe_archer@feddit.uk 2 points 2 years ago* (last edited 2 years ago)

This is the sensor module: https://www.aliexpress.com/item/1005005921080708.html?spm=a2g0n.order_detail.order_detail_item.3.496af19cSQkowI

This is the microcontroller: https://www.aliexpress.com/item/1005006018009983.html

This is the project on GitHub I use for the HA integration: https://github.com/Chreece/LD2411S-ESPHome

And the case I use is on this project for a very similar setup to mine: https://github.com/igiannakas/mmWave-Presense-Sensor-D1-Mini-DFRobot-/tree/main

[-] Bluesheep@lemmy.world 3 points 2 years ago

Great answer, thank you!

[-] jonno@discuss.tchncs.de 1 points 2 years ago

How do you power your setup?

[-] joe_archer@feddit.uk 2 points 2 years ago

All of my wall sockets include usb power outlets, so they're all powered via those, I'm currently working on using an 18650 or 2 to power one as an experiment, but as they're WiFi and need to react in a timely manner putting the microcontroller into sleep mode isn't really an option, meaning the battery life won't be very good. The RADAR module needs a solid 5v as well so I'm not sure it will be practical.

[-] CmdrShepard@lemmy.one 1 points 2 years ago

I googled the sensor and found this github entry. https://github.com/Chreece/LD2411S-ESPHome

Seems like a pretty simple plug and play setup with an ESP device.

this post was submitted on 27 Oct 2023
31 points (94.3% liked)

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