AqaraPresence Sensor FP2, mmWave Radar Wired Smart Motion Sensor, Zone Positioning, Multi-Person & Fall Detection, Supports HomeKit, Alexa, Google Home, and Home Assistant, 2.4 GHz Wi-Fi Required

I had to buy another one of these for my main floor after seeing how it worked in my basement.I'm very impressed with the accuracy and ability of this presence sensor. I have each of my main living spaces split up into about 7 zones each with their own automations (lights turning on, etc) using HomeAssistant. It's not perfect with accuracy, but it's very close, and better than I've gotten with PIR sensors and ESPHome mmwave sensors. Those sensors only detect presence, but this Aqara sensor gives a highly accurate (again not perfect, but VERY good) 2-dimensional (x,y) representation of where the "presence" is in the room. Accuracy is highest with only one person in the room, and it maxes out at about 5 people as far as telling where they are. However, even with that, it still does a great job with general presence.For setup, this WILL take a bit of time. No, it's not complicated. But yes, it takes a decent amount of configuration. I love playing with home automation projects, so it wasn't a chore for me, though some people who want things to "just work" may not enjoy the setup. It takes a bit of configuring, because it's extremely versatile.For my setup, I had to install the Aqara app and configure it through there first. I then calibrated the sensor, setup the zones with names, etc. After that was done, I added it to HomeAssistant, which does not see the x/y map but instead a list of binary sensors for each zone I configured and if presence is detected in them or not. It also exposes a binary sensor that reflects if any of the zones show presence or not. Lastly, it provides a light (lux) sensor which seems pretty accurate.I haven't tried the other features light sleep monitoring, etc. My main need is presence detection by zone, and I'm very happy so far!

I now own and use two different Presence Detectors. I bought the FP2 Detector because, unlike my first unit, it supports multiple detection zones. Being able to designate detection zones works much better for me. I am glad I made this purchase.The FP2 actually has three modes of operation – Fall Detection, Sleep Monitoring, and Zone Detection. I only use Zone Detection, and have set up 6 out of a maximum of 30 detection zones. The unit’s coverage area is divided into 320 checkerboard squares, and you can configure which of those squares compose each zone that you wish to create.My house has an open concept floor plan, and I have located my FP2 such that it can detect presence in my Kitchen, Dining Room, and Living Room. I have setup zones for controlling the ceiling lights in each of those these rooms, along with several individual lamps in various locations.The competitor’s Presence Detector I purchased earlier detected anything and everything within a 120° angle in front of it that was within a certain distance based on a ballpark sensitivity setting. It failed to detect some areas I wanted included, and detected other areas I didn’t wanted included. The FP2, with its zone detection, resolves that issue. For example, I have a small 2 square zone that encompasses our piano bench, which I use to turn ON the piano music light when and only when someone is sitting there.I noticed this product has some poor reviews. I suspect this is because some users had difficulty getting it setup and configured. I personally was a bit challenged getting mine setup and working, despite already having done lots of automations using dozens of smart devices. For this reason I have deducted one star. However, now that I am familiar with this unit and its capabilities, I would not hesitate to order another one – and I would not consider an alternate cheaper unit as I did for my first presence sensor.The instructions are sparse. I ended up setting it up three times before I got it working like I wanted. I discovered it helps to configure the Edge Zones along the perimeter of the detection area, as well as Entrance & Exit Areas to minimize unwanted detections. I also discovered it helps to be slightly generous on most Detection Zones because the exact location a person is in becomes less precise the further you are located from the sensor, or when a person is near a reflective surface such as a refrigerator.The Aqara App only controls Aqara devices. Thus, out of the box I couldn’t use it to perform any automation! Fortunately, it links to Alexa, and once I linked Aqara to Amazon’s Alexa, I could start controlling the lights and lamps in my house. The Aqara App claims to also link to Home Assistant, Google Home, and IFTTT. I don’t use IFTTT and was unable to get it to link to Home Assistant. For my more complex automations, I use Smartthings since Alexa routines are limited to a single Trigger. Thus, I ended up creating Virtual Switches in Smartthings and used Alexa to flip those switches based on Presence in each of the zones I created. Later, I got a Smartthings Hub which would recognize the FP2, which allowed me to use Smartthings without going through the overhead of Alexa. Smartthings and its ability to use virtual switches allowed me to create more complex routines, such as turning off the lamp between my recliner and couch when some leaves the couch zone and no one is in the recliner zone – but if someone is still using the recliner, only turn Off the far couch lamp (multiple ‘IF’ triggers required).The FP2 has a Luminance meter, but getting that to control whether automated lights are turned On or not when Presence is detected was a big challenge for me. The workaround I initially came up with was to create a dummy zone in Aqara and use Aqara automation to control Home & Away status in that zone based on the Lux level. I then used an Alexa routine that would flip a Smartthings virtual switch based on the Aqara ‘Simple Security System’ device value of Home or Away. Why that functionality couldn’t have been made much more straight forward is beyond me. However, after I got my Smartthings Hub to recognize the FP2, I was able to add conditional triggers in my Smartthings automations that were tied to luminance levels, making FP2 luminance levels easier to include in automations and also make Lux thresholds flexible.The bottom line is that the FP2 is a very capable device. But more capabilities equates to more complexity. Thus, don’t expect to have lots of automation configured and working an hour after unpacking the unit. And unless you have other Aqara devices or a hub that recognizes the FP2, don’t expect to perform to automations until you link it to another App such as Alexa. Note that once you link Aqara to Alexa, you can pretty much do any automation that you would normally do in Alexa. It’s only when your automations get too complex for Alexa that automation understandably becomes a bit more involved, and has to jump through hoops involving products/apps from multiple manufacturers.