AqaraDoor and Window Sensor P2, Matter Over Thread, Requires Thread Border Router, Contact Sensor with Remote Alarm and Local Automation, Supports Apple Home, Google Home, Alexa and SmartThings

Aqara makes some of the best smart home technology you can buy, and these are so far the best door/window sensors I've purchased. I really like that it is built with Matter; it works with Apple's HomeKit right out of the box and also paired easily with Home Assistant. No hub needed. If you're very familiar with either of those smart home systems, you know how frustrating it can be if you ever experience an internet outage... waiting for all of your devices to come back online, sometimes needing to be repaired. I have never experienced this issue with these Aqara sensors. They come back online ASAP and I have never had to re-pair them.

Big House “3 Aqara Hub M3, 3 HomePod Mini, 4 Apple TV last Gen, 3 Last Gen of Alexa” and great, fast and reliable Mish Network. This is my Smart home base.For Aqara sensors I have the old one, I bought the new Matter sensor, it’s worst difficult to pair it with all smart echo system.It’s was nightmare I couldn’t do anything, I try everything maybe you’ll think it and not pair.So what I did? I erased my whole network, then setup my WiFi from ground up, finally I pair with HomeKit and Aqara app.I found the previous sensor it’s way better fast and it’s showing for how long door open or even if it’s offline.

These are wonderful, but you have to do a few things if you're having issues. I tried connecting one and it was not working at all. So I tried to set up another and the same thing happened.Since both were not working I figured it was something with my network. Turns out my mesh router (Google Nest Wifi Pro) was conflicting with my router (whatever ATT gave me). The ATT router had its WiFi signals enabled for 2.4Ghz and 5Ghz so when the set up was happening, it was picking up both WiFi connections from my phone. I disabled the signals from the ATT router, and they still weren't working, but I wanted to try a third just in case, and it magically connected easily.Since that started working, I wanted to troubleshoot the other two that were still having issues. I figured hat during the setup, the devices remembered the settings so I needed a way to reset them and start fresh. I saw a video from their YouTube account that you can factory reset if you press the button 10 times.Once I did that, both connected easily.I bought 13 of these and never had an issue setting up the other 11 after the network issue / factory reset took place. They are easy to set up and don't get in the way.Finally I used the extra magnets that came with each device on my fridge, lol.

When these work, they work well. I've been using them for about a year, and most of the time they work as expected.It's unclear whether it's the matter protocol or the product themselves, but occasionally, my entire matter network stops responding, and I need to re-pair every device from scratch. A couple times, it's only been these aqara sensors that stop responding.I am unsure if they have a replaceable battery, but they have remained functional through the past year at least.The difficulty when troubleshooting these brings down the score. However, they are working and responsive as I write this review, and I expect that I will continue to use them.

tl;dr: I have 5 of these connected to HomeAssistant. 3 work flawlessly - the other 2 constantly fall off.In theory, these are great. I really like the idea of Matter and Thread as a manufacturer independent standard. Sure, commissioning devices is laughably slow and complicated compared to ZWave or (blech) Zigbee, and sometimes randomly fails... I have a degree in networking and can handle that.But where it all falls apart is reliability. For no reason, after a few days or weeks, 2 of my sensors (one of which is in spitting distance to the router) routinely disappear. Sometimes they reconnect on their own, sometimes I have to push the button to get them to reconnect, sometimes they won't reconnect unless I take the battery out and replace it.The 3 others work fine, as do Thread devices from Eve, so presumably this is a hardware QC issue and not a design issue with this sensor or Matter/Thread in general.Can't recommend them for anything that needs to be reliable, like an alarm system.

It’s great, It looks kinda funny. But it was an easy setup and works great. Although it will disconnect from the internet and not easy to repair. It sticks to the door frame great. It’s kinda big and chunky.

I have all the hubs and "Thread" routers needed to connect this thing. It took me an hour just to connect it, it only can be added on a hub device (in my case iPad, connected to power source). When connecting to iPhone or any other Apple device it produces an unknown error that is not described anywhere. There are no instructions how to connect it if there's an error.UPDATE: It frequently and randomly goes offline. Quite an unreliable deviceUPDATE 2: I spent at least 5-7 hours of my life on this device (I need to be paid as a beta tester please). I found out that for it to work you need iPhone, Apple TV and iPad be on the same network all the time, and never go to sleep. That's quite an unrealistic requirement that is never mentioned anywhere!