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.