Presence Sensor, WenzhiIoT Smart Motion Sensor WiFi 24 GHz Radar MmWave Presence Sensor Movement Body Motion Detection for Lighting 110/220V Wireless Switch Celling Mount Tuya Smart Life Home

It was quite hard to find a good mmwave sensor that fits into a ceiling and works well. This one does! And it's pretty handy that it has a line/neural out, so you can just connect a lightbulb without even using home assistant or tuya or whatever.

Funciona perfecto, fácil de instalar y configurar

Compre dos unidades y me indica que hay personas cuando no las hay... lo he configurado para que no sea tan sensible y siguen igual.

These presence sensors are truly impressive. They go beyond basic motion detection by accurately recognizing human presence and responding instantly. The setup was straightforward, and since installation, they’ve been working flawlessly. They add a reliable and advanced layer of automation to my smart home, ensuring efficiency and convenience. If you’re looking for sensors that excel in human presence detection, these are an excellent choice!

I don't know whether any of the other reviewers actually installed it correctly. In the National Electrical Code (NEC), you have to terminate or splice non-metallic (NM) insulated cable inside a junction box. Suppose the area under the clear cover counts as a junction box, and you want to use the breaker in the sensor, then you have to fit two NM cables inside the plastic bar that holds them down. There's barely enough room, and no room inside the splice the ground wires together. Furthermore, one of the terminal screws had stripped threads in the one I got.Also, the settings are not intuitive. Why can't "shield range" be adjusted below 0.3m? If "detection range" is 3.6m and "entry dis-indentation" 1.5m, it detects things farther than 3.6-1.5 = 2.1m away. When "entry dis-indentation" is greater than 1.5m, it doesn't detect anything anywhere.

This is compatible with Home Assistant, which is nice. You can use Wifi and setup the App to also use it. Or you can wire a light inline with it and let it turn on the light when it senses someone. The plan is to install this in the middle of the hallway. If someone is in the hallway, it will turn on the lights automatically. Installation is easy. Drill a hole and in the ceiling and slide the tube into the whole. The spring loaded clamp will hold it in place. Wiring is nice with the wire clamps.

I have this connected via Home Assistant and surprisingly this worked well. You have a lot of customization but so far I love it.

First, the device is well-constructed, and there are a few thoughtful additions for safety that I appreciate. For one, there's a transparent plastic shield around where the terminals attach to the wiring. There's also a built-in wire clamp that screws down onto, say, romex wiring to hold it securely. One perk I haven't seen on devices of this type is the ability to control a secondary load, e.g. a light fixture, directly from the device and assumedly entirely locally. The device has hot and neutral terminals for this secondary load alongside the power input. There's a nice big pressable button on the front for putting it in pairing mode, and a red/blue LED that displays its status, including when it's in pairing mode.Like most devices of this type, you first use a hole saw to drill a hole, then you fold back the little spring-loaded arms and insert it; the arms then spring back, holding it in place. I haven't actually installed it into ceiling yet myself, but I imagine it would take a 2.5" hole saw to make an appropriately-sized hole.Unsurprisingly, it's a Tuya device, so you can use the Tuya or Smart Life apps to pair it with your network and account. Since I already have a bunch of Tuya devices and thus bridges to my two home automation platforms (Home Assistant and Hubitat), it fits in nicely in my ecosystem; I can monitor and somewhat configure it from them both. For fine-grained configuration you can always use the Smart Life app. It may also be possible to get the same degree of control from HA/Hubitat, but I haven't explored the possible drivers for the device on each platform.The device has a light intensity sensor which reports in units of lux, and of course the 5.8GHz mmWave presence detector. The device does a good job of quickly detecting my presence and even reports my distance from the sensor, although the distance detection seems to vary quite a bit. I can't really gauge how good the departure sensing is, since there's a configurable delay that only goes down to 5 seconds before considering the area unoccupied.Regarding the UI in the Smart Life app, there's a large panel at the top that indicates whether the area is occupied, the aforementioned lux sensor, the status of the breaker (I assume this is the secondary load), and a distance detector that seems to fluctuate quite a bit despite me just sitting here next to it with it on the ground. Below the sensor readouts, there's a "history log" of timestamps and occupancy statuses, which is kind of a nice addition IMO. I imagine that log might get a little unwieldy after a while, since you have to scroll through it linearly.Finally, there's a set of three icons: a gear, a power button, and three dots.Under the gear icon are settings for:- Departure delay can be adjusted from 5 seconds to1500 seconds, i.e. 25 minutes.- The detection distance can be adjusted from 1.5m to 10m, but I haven't tested it.- Sensitivity can be adjusted from 1 to 9, but I don't know what units those are.Also under the gear icon, there's a number of settings that seem to pertain just to entry detection, I assume to exclude false positives:- Entry sensitivity is also adjustable from 1 to 9- "Entry filter time", which ranges from 0.00 to 2.00 seconds in increments of 0.01, to have a window in which the sensitivity is different than when the device is continuously detecting presence.- "Entry dis-indentation", which ranges from 0.00 to 10.00m; I have no idea what it does, but I assume it's related to entry detection from the name.- "Shield range" ranges from 0.00 to 10.00m and I assume is a minimum distance from the sensor in which it doesn't detect presence.- "Block time", ranges from 0.1 to 60.0 seconds; I assume this debounces the entry detection so that you can't trigger it twice within that window, but I haven't experimented with it yet.Under the power button are the following settings:- "Status indication": the options are "silence" and "instructions"; this seems to just turn on the blue LED when it's set to "instructions" and turn off the LED when it's set to "silence"- "Sensor": options are "running", "stop running", "force reporting occupy", and "force reporting unoccupy". It's nice to have the ability to override it!- "Breaker mode": options are "standard(cloud linkage)" [sic], "local(automatic)", "mandatory (field control)", and "not support". I assume these set how the secondary load is controlled, but since I don't have a secondary load handy I wasn't able to try them out.- "Breaker status": options are "turn off" and "turn on"; again I wasn't able to test it, but it's nice that you can force it to be one or the other, I suppose.- "Breaker polarity": options are "normally open" and "normally closed"; I presume this means that it turns on the load when presence is detected in "normally open" mode, and does the opposite in "normally closed".- "Illumin threshold": ranges from 0.0 to 1000.0 lux; I assume this allows you to only have it work when it's below some illumination threshold, e.g. to turn on a light when presence is detected only when it's otherwise dark.Finally, the three dots menu has the following options:- "Factory parameters": only option is "restore", which assumedly resets its configuration?- "cline": it has a little shield next to it and when pressed prompts you for text in a dialog also labeled "cline"; I have absolutely no idea what it does.Minor nitpicks:- I wish I could make the departure delay 0 to properly test how quickly it can detect absence- The gear menu has two headers over each bank of options that just read "text", which is a little sloppy IMO.- Still no idea what that "cline" option is all about.- The distance sensor seems erratic, but that could be because I have it sitting on the floor and not properly mounted in the ceiling as the manual describes.Anyway, aside from the nits, it's a nice, thoughtfully designed device with lots of configuration options, and that seems to do what it says on the tin.