Door and Window Sensor P2, Contact Sensor with Remote Alarm | Matter Over Thread, Requires 2-in-1 Matter Controller & Thread Border Router, Supports Apple Home, Alexa

Easy installation in service for several months now. Works great no issues. Will buy again. Matter over thread works seamlessly with Apple & Google Homes and Aqara matter controller

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.

I’ve been a long-time Aqara customer with over 35 Aqara products at home — including switches, cameras, and sensors. The original Aqara Zigbee contact sensors have worked flawlessly for years. That history of reliability is what led me to purchase four Aqara P2 Contact Sensors, which use Matter over Thread. Unfortunately, the P2 has failed to meet expectations. Constant Disconnections: After just a few months, the P2 sensors started disconnecting from Apple Home. Unlike Zigbee devices, which reconnect automatically after outages, the P2 requires a manual factory reset and re-pairing. This means removing it from Apple Home and rebuilding every associated automation and shortcut. This disconnection occurs roughly every two months or after internet outages, even though Matter and Thread are supposed to be local protocols. Other Matter and Zigbee devices recover just fine — only the P2 fails consistently. Battery Drain Issues: One of my P2 sensors showed 0% battery. After inserting a new CR123A battery, it dropped to 25% within a day and 0% by the next. Another fresh battery dropped to 75% in minutes. I contacted Aqara support, who attributed it to residual power and advised removing the battery, holding the reset button for 5 seconds, then reinserting it. This did not resolve the issue. Poor Customer Support: Support requires emailing Aqara and waiting 3–4 business days between responses. After weeks of following scripted troubleshooting steps, they concluded that my device was out of warranty and that I would need to purchase a new one. Given the issue appeared after a battery change, this response was especially frustrating. Final Verdict: The Aqara P2 Contact Sensor is unreliable, difficult to reset, and not ready for real-world use. If you’re heavily invested in automations or HomeKit, you’re better off with: • Aqara’s original Zigbee contact sensors, which are far more stable • Or Eve’s Matter-compatible contact sensors, which have performed far more reliably The P2 is not worth the time or effort. Aqara’s implementation of Matter is still too immature for a critical-use sensor.

EDIT: although I did not request it, the seller did see this review and offer to refund the cost of the malfunctioning sensors, which I appreciate. I’m a little torn at this point - on the one hand, two of five are not working, which seems like a high failure rate, but one sample isn’t enough data to make that judgement. Could just be bad luck. Also, obviously they still don’t update via HomeKit, which I consider a flaw. However, the description does disclose that a hub is required, and the ones that do work are still working great. With that in mind, assuming someone has or is willing to buy a hub, and assuming the 66% failure rate is a fluke (or could be fixed with an update), these would be the best door and window sensors I’ve used so far. So I’m going to bump this to 4 stars, just make sure you understand the limitations and requirements to make them work at a 4 star level. First, the good - these are pretty nice, reasonably economical door and window sensors. Not the cheapest, not the most expensive. While a bit large and clunky, they're still attractive reasonably unobtrusive. Another nice feature is the distance from the sensor to the magnet that registers as "closed" is quite long compared to many sensors. That's a big deal because if you have trim around your doors, for example, you can mount the sensor on the trim and the magnet on the door and it will still work. With other brands, it simply won't work at all, or they include spacers you have to stack up until they are close enough in an ugly, kinda hack-ey way. Aqara's way is better. They also pair pretty easily, report excellent signal no matter how far from a Thread router they are in my (admittedly not very large) house, and the ones that work properly have worked every single time without a single failure or "no response" issue. I'm quite happy with their performance. Now, the not so good. I bought five of them. I am using Apple Home (HomeKit) via Matter over Thread. Three of them work great. Two of them drain the battery in under two weeks. Replacing the batteries, removing then re-adding to Home, factory resetting then re-adding to Home, and even moving them right next to the active hub/thread border router (an AppleTV 4K) doesn't fix them. Their signal strength reports excellent. They are connected to only one thread network, only one Thread router (just like the working ones, some of which are further from the router), it's winter here so they're not even being cycled. They just suck the battery dry. So there's one more thing I could try - a firmware update. And that's a problem. There is newer firmware available, but you cannot update the firmware via HomeKit. Since I have no Aqara hub I cannot update them. This is admittedly my fault. If you read the description carefully, it says an Aqara Matter Controller/Thread Border Router is required. However, since my other thread/matter devices all update fine through HomeKit, I just assumed these would too. I thought it was part of the Matter standard. No hub is one of the big selling points of Matter over Thread devices. I figured the hub requirement was just for additional features or something I didn't care about, like renaming the device or something. But apparently while it is possible to make updates available in Matter/HomeKit, it is not required to meet the standard. I need to be able to install updates. As these work on firmware 1.0.1.1, in my setup, I cannot. Since I can find no indication on the Aqara web site or any other source indicating that's a known fix for this battery drain issue, it's a roll of the dice to buy a device that serves no other purpose for me. I also started to sign up for an Aqara account to get support through that avenue, but when it asked for my birthday that was it for me. Maybe they would replace it under warranty, but then I'd have 5 devices I can't update without buying more hardware instead of three. Not sure that's even worth it. I gave up. I'm going to cut my losses. If you already have an Aqara hub (many of their cams are also hubs I think) or are willing to buy one, or if you don't mind the return hassle, or if my 66% failure rate isn't typical, or if you just don't care if you can update the firmware, these may be great for you. As I said, the ones that are working do work very well. Perhaps, if it is just firmware, by the time you read this they may be shipping with an update and work fine (or maybe even with updates enabled?) via HomeKit alone without the hub. If so, these are probably worth trying. For me, I think I'll just chalk it up to a learning experience and move on. I've already tossed the packaging (stupid of me), so I won't bother trying to return them to Amazon. Plus, they may not be defective. They may just need an update that I'm not willing to do. I'm just going to toss the bad ones, plan to phase out the others eventually. There are plenty of door and window sensors that work and can be update via HomeKit so this brand will probably be pretty low on my list for any home automation devices in the future. It's too bad, because the G100 camera is an absolute monster value that is just about impossible to beat, and requires no hub to work. If you need a cam (indoors or out!) you may still want to check it out. But the inconsistency between these two products, even though partially my fault for misinterpreting the hub requirement, gives me lingering doubts that will be difficult for me to overlook. So let's call it three stars - one added for every one that works and works well, and one subtracted for every one that doesn't.

I needed to replace a door and window sensor and thought I'd give this one a try, since it's Matter over Thread. While the sensor is a little bigger than I'd like, it sits high up on a door and doesn't stick out much. I forget it's there now. I added the sensor directly to HomeAssistant (because I have HA set up in my Thread network already) and it added quickly without any hiccups, so it's definitely possible. I did have to replace the battery it came with, since I think the battery had drained while sitting in the box, but that wasn't a big deal. The sensor works great and I would definitely buy another one. Whenever possible I prefer Matter over Thread or Z-Wave devices for use in Homekit to keep 2.4GHz interference down and to keep IoT devices off my wi-fi network, taking up IP addresses. This one was a good buy and I recommend it IF you already have a thread border router. If you don't use Home Assistant and just use HomeKit, I still recommend it because I was able to pair it with HomeKit and it worked flawlessly. I have an AppleTV 4k and a few HomePod minis as border routers, so your mileage may vary.

I have this connected and working with my home assistant automations. The included magnet and the ability to adjust the section range is great. That being said Aqara does not use Matter DCL for firmware update. Which makes it hard for me to recommend any Aqara matter devices.

I have not had any of the connectivity issues or reliability issues that some reviewers have had with this product. To date I have purchased 7 of these contact sensors, and they have all been rock solid, in fact theyve been some of the most reliable products in my smart home. If that changes I'll edit this review with an update. They all paired to Home Assistant using Matter quickly and without issue...except for one. One was actually giving me a decent amount of trouble with pairing. I ended up temporarily turning off my Wifi's 5Ghz network, factory resetting multiple times, and retrying multiple times, but it did eventually work, and that sensor has not given me any trouble since. The sensors are also pretty fast to update, and while it's a tad bulky for a contact sensor, the trade-off is that i've gotten great battery life out of them so far. I have no complaints

The aqara door sensor is a well-made product albeit a bit bulky. It reminds me of the Nest Detect of the past. But the Nest Detect also came with a follow-me home light, quiet entry button and a motion detector. I like that this sensor comes with ability to configure the sensitivity which gives you more options for proper placement. I ultimately decided to scrap this product because it was not able to reliable keep a connection. My thread network is managed by Apple TV 4k border router and HA as Matter-controller. It was the _only_ device on that network. But it would disconnect multiple times per day. None of my other 74 devices (mix of Zwave and Zigbee) have this problem. Unsure if it is this sensor, my Apple TV or HA but it isn't working properly. For me, Matter-Thread is not ready for prime time.

I bought these to put on my office door and set up an automation so I get an alert on my phone whenever the door is opened while the room is shut. I also linked it to my Echo, so it announces “Get out, owner has been alerted” if someone opens the door. It works perfectly and triggers instantly. It’s ideal for when you have guests round — especially if they have kids who like to snoop — because you know straight away if someone opens the door. Easy to set up, reliable, and works great with Matter and Thread. A really solid contact sensor if you want proper smart‑home security and automation.

NOTE FOR APPLE TV USERS: Make sure that you have a Matter / Thread Hub type device like the 128 GB Apple TV - for some reason 64 GB Apple TV doesnt have the Matter hub in it. Assuming you have a Matter Hub - Works pretty good and connects very easily with Apple HomeKit so I didn't have to download the Aqara app. I will probably buy another for another door now!

Compré este sensor Aqara P2 para monitorear puertas y ventanas. Ha sido una adición perfecta a mi sistema domótico. ✅ LO BUENO: 🔐 Detección precisa - Identifica correctamente si una puerta o ventana está abierta o cerrada. Sin falsos positivos. Funciona exactamente como promete. ⚡ Respuesta rápida - La notificación llega casi instantáneamente a mi teléfono cuando se abre una puerta. Sin retrasos apreciables. 📱 Integración Matter - Compatible con Matter Over Thread, lo que lo hace futuro-proof. Funciona con HomeKit, Google Home y otros ecosistemas. 🔋 Batería duradera - Llevo 3 meses sin cambiar la batería. Autonomía excelente. El sensor avisa cuando la batería está baja. 📏 Diseño compacto - Es pequeño y discreto. No ocupa espacio ni desentonía. Se monta fácilmente con adhesivo o tornillos. 🔧 Instalación sencilla - Setup en minutos. No requiere configuración complicada. Cualquiera puede instalarlo. 🤔 CONTEXTO: Tengo 5 sensores en mi casa (puertas y ventanas principales). Todos funcionan perfectamente. Los uso para seguridad y automatización de luces. 👍 VEREDICTO: Si buscas sensores de puertas/ventanas fiables para tu casa inteligente, este es. Aqara tiene buena reputación y este producto la confirma. 💡 ¿PARA QUIÉN? ✅ Si tienes sistema domótico (HomeKit, Google Home, etc.)✅ Si quieres monitoreo de seguridad en puertas/ventanas✅ Si necesitas automatización basada en apertura/cierre✅ Si valoras confiabilidad y sencillez✅ Para integración con Matter/Thread ❌ Si no tienes hub domótico compatible❌ Si buscas algo ultra barato (hay opciones más económicas) ⭐ PUNTUACIÓN: Precisión: 5/5 ⭐⭐⭐⭐⭐Velocidad de respuesta: 5/5 ⭐⭐⭐⭐⭐Durabilidad batería: 5/5 ⭐⭐⭐⭐⭐Facilidad de instalación: 5/5 ⭐⭐⭐⭐⭐Compatibilidad: 5/5 ⭐⭐⭐⭐⭐Relación precio-valor: 4.5/5 ⭐⭐⭐⭐ 🎯 CONSEJOS DE INSTALACIÓN: ∙ Limpia la superficie antes de aplicar adhesivo ∙ Verifica la señal del hub antes de instalar ∙ Calibra el sensor si es necesario (solo toma segundos) ∙ Revisa la batería cada 6 meses 🏆 RECOMENDACIÓN FINAL: Compra estos sensores sin dudarlo. Son fiables, fáciles de instalar y funcionan perfectamente. Aqara es marca seria en domótica. Perfecto para casas inteligentes serias. ¡Muy recomendado! 🏠✨

J’utilise principalement HomeKit, avec des appareils de différentes marques, et ce détecteur de porte Aqara P2 s’intègre parfaitement grâce à Matter. L’appairage est simple et rapide, et le capteur est immédiatement reconnu dans HomeKit sans difficulté. La détection est très réactive, aussi bien à l’ouverture qu’à la fermeture, ce qui le rend idéal pour les automatisations (notifications, éclairage, alarmes, etc.). La compatibilité Matter est un vrai avantage, car elle permet d’utiliser le capteur avec un écosystème multi-marques tout en conservant une excellente stabilité. Le capteur est discret, bien fini et inspire confiance côté qualité. Points positifs : ✔️ Compatibilité HomeKit native via Matter ✔️ Fonctionne parfaitement dans un écosystème multi-marques ✔️ Installation simple et rapide ✔️ Détection fiable et instantanée ✔️ Design discret et bonne qualité de fabrication Points négatifs : ❌ Nécessite un hub compatible Matter / Thread ❌ Un peu plus cher que les capteurs non Matter Conclusion : Un excellent détecteur de porte pour les utilisateurs HomeKit qui veulent une solution fiable, moderne et compatible avec plusieurs marques grâce à Matter. Très satisfait de ce produit.

WICの照明を自動点灯したくなったのですが、反応遅延が大きいとか、WANが死んだら反応しないとかは論外なので、エコシステムにはHomeKit（HomePod mini）を利用し、本センサーでオートメーションを組むことにしました。 我が家はもともとPhilipsHue照明を多数導入していましたので、WICにしてはオーバースペックとなりますが、PhilipsHueのホワイトグラデーション75W相当を利用しました。 （夜間は色味を変える等も見越して...） ただ導入過程でさまざまな課題にぶち当たります。 1. HomeKitに追加できない 2. 付属のマグネットの用途がわからない 3. 取り付け方の説明が大味 4. 電池の絶縁シートが変に挟まってて抜けない 5. 電池蓋が固くて手で開けられない まず1つ目、説明書にはペアリングモード（ランプの点滅状態）になってればOKという記載がありますが、うまく繋がりませんでした。 これはあえて一度電源オフ（ボタン10秒くらい長押し）して、再起動すると行けました。 2つ目、なんか磁石が付いてるんですが用途不明です。説明書にも特に記載がありません。 ChatGPTに聞いたところ、本体↔︎アクセサリパーツの距離が規定距離に収まらない時の補助用部品らしいです（ホントかは不明）。 なので使いませんでした。 3つ目、これも説明書がらみですが、取り付け方の説明書きが大味すぎてよく分かりません。 公式サポートに『動画チュートリアル』があるのでこれを一度見ることをお勧めします。 とにかく添付の説明書は役に立たない点、ご留意ください。 4つ目、まあ偶然のハズレ個体かと思いますが、絶縁シートが電池蓋に巻き込まれてえらい事になってました。 幸い絶縁できてた＋シートが抜けたので良かったです。 5つ目、絶縁シートを抜く過程で電池蓋を開けるに至ったのですが、マイナスドライバーなどの固くて薄い一の字型の工具がないと開けることが困難です（動画チュートリアルにも力が必要と明言されている）。 センサーを貼り付けたあと、電池交換の際には苦労しそうな予感があります。 そんなこんなで困難を乗り越えた訳ですが、センサーの質がすこぶる良くって加点が減点を打ち消しました。 反応速度、反応精度、電灯のオンオフ切り替えいずれもパーフェクト💯で期待通りのオートメーションが組めました。 カプセル型かつ本体サイズが少し大きめで目立つのが惜しいところですが、HomeKit対応ドアセンサーとしては最高峰の商品なんじゃないでしょうか。 今後追加で開閉センサーを仕込みたくなったら本品をリピートさせていただくつもりです。 （黒色のバリエーション展開もお願いします）