Security alarm with matter overt thread

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Hello,

I am considering buying some P2 sensors, and U400 door lock.
I would like to add them to my Apple home thread network and exposes with matter to Apple home.
I am then considering an M3 hub to join the thread network and also get the sensors and lock exposed as matter from Apple home.

Will it work if I enable pairing mode from Apple home on each accessory then add them to the M3 hub ? Will it use « thread → Apple border router → WiFi/ethernet → m3 hub » or directly « thread to m3 hub » or something different ?
Can I then use these accessories in alarm scenarios in the M3 hub ?

Thanks

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Hello and a very warm welcome to the forum.

I understand that you already have an Apple Home Hub, which serves as a Thread Border Router and Matter Controller.

If you add the M3 Hub, both will form a shared Thread network, provided you use the Aqara Home app to import the existing Thread network credentials into the M3. Regarding your question about the communication path:

  • Inside the Thread Mesh: Your sensors don’t communicate with a specific hub. Instead, they route their data packets automatically via the best available nodes within the mesh. The mesh itself handles the routing dynamically, ensuring the most stable path to the infrastructure. The M3 Hub will therefore strengthen your Thread network.
  • The Hubs as Border Routers: The Apple Hub and the Aqara M3 act as gateways (Border Routers). They translate the Thread traffic into standard IPv6 data for your home network (LAN/Wi-Fi).
  • Backbone Coordination: Both hubs are coordinate over the so-called “Thread Backbone Link.” This is a non-Thread IPv6 network—typically Ethernet or Wi-Fi—that connects multiple Thread Border Routers to synchronize data and extend network range. Only if two parts of your Thread mesh are too far apart to communicate directly via radio, the Border Routers will automatically route the traffic over your Wi-Fi/Ethernet backbone instead. This ensures a stable connection across different floors or through thick walls, as long as both hubs are connected to your home network.

Ultimately, you don’t need to worry about the specific communication paths. Thread is designed to automatically manages the routing and always finds the most efficient and reliable path for your data.

The M3 Hub and the Apple Home Hub both also function as Matter Controllers. The M3 Hub acts as the Matter Controller for Aqara Home, and the Apple Home Hub for Apple Home. For every ecosystem where you want to add a Matter device, you need a Matter Controller from that specific manufacturer. For example, if you also wanted to add devices to Google Home, you would additionally need a Nest Hub.

Further reading: Matter & Thread: A Guide Through the Jungle

Yes, if the sensors are already bound to the Apple Home Hub via Matter over Thread, selecting “Turn On Pairing Mode” will generate a new Matter Multi-Admin code. You can then use this code to add the device to the M3 Hub as a second controller. Please note that names or room assignments changed in one app will not automatically sync to the other.

Yes, with the Aqara M3 Hub, you get a native alarm system where you can utilize these accessories. You must configure the alarm system within the Aqara app, but you can still activate or deactivate the respective alarm modes directly in Apple Home. A major advantage of using the M3 as the controller for these scenarios is local execution: the alarm will still trigger even if your internet connection is down or the Apple Home Hub is offline, providing significantly higher reliability for your security setup. However, as far as I know, the alarm system is provided via HomeKit and not via Matter.

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Hello, welcome to the forum.
Continuing the topic, here is a description of the Aqara security alarm settings. Lesson 1 Setting up the security system APP (adding a card with a security panel)

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Hi,

Wow thank you for this amazing answer to all my questions !

So it seems that Aqara did a very great job on supporting all the different options with recent features like multi admin and it would fit most of my needs.

I was asking that networking stuff, because I wouldn’t like to have the alam automations and/or my home automations each depend on both M3 and apple home hubs. But now I think I understand that they will connect to a common thread network to both access and control the different accessories thought thread directly thanks to multi admin.

So if I understand correctly, I may connect all to Apple home, then join the same tread network with the M3 hub and pair the same accessories to the M3 aswell thanks to multi admin.
I can then setup my regular scenes and home automations in Apple home so I benefit Siri from the HomePod (and Apple home hubs failover) for them;

And setup the alarm system and scenario’s (and maybe a bit more complex scenes) in the M3, using the shared Aqara devices, is it right ?

Talking about that, does M3 hubs supports failover like Apple home hubs do ? If so I would consider having a second wired M3 hub for redundancy.

Also, can I on top of that expose the alarm switch only from M3 to Apple home then (through HomeKit as matter doesn’t support it yet) ?

Thanks a lot for your help :slight_smile:

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Thanks, I was looking for such documentations that will help a lot

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That is exactly how it works, provided the devices or sensors carry the Matter logo. Additionally, you can connect Aqara Zigbee devices to the M3 Hub and use them within Apple Home as well—including with Siri.

As mentioned, you get a full alarm system with the M3 Hub, and you can use all devices connected to the Aqara ecosystem. For instance, the night alarm can be triggered by specific sensors (motion sensors, door/window contacts, vibration sensors for glass breakage, cameras with person detection, etc.). Once an alarm is triggered, you can control various devices—for example, the M3 Hub features a 95dB siren, you can turn on lights, open blinds, and much more. This works either through the alarm system itself or alternatively via automations and scenes. And yes, the Aqara system offers more possibilities than the Apple Home app, though you can use both systems simultaneously.

Yes, the M3 Hub supports a feature called “Hub Cluster.” You can set up multiple M3 Hubs in a cluster where one acts as the “Leader” and the others as “Backups.” If the leader hub goes offline, another M3 in the network automatically takes over the execution of local automations and device management. This provides the redundancy you are looking for, especially if you use wired Ethernet connections for both.

You can find more information in the FAQ: Hub M3 - Faq - Aqara

Exactly. In Apple Home, you will see a device named “System”—that is your alarm system. You can then set it to Home, Away, Night, or Off. You can configure which devices are active in which mode within the Aqara app. For example, in “Away” mode, motion sensors might trigger the alarm, while in “Night” mode, only contact sensors are active so you can still walk to the fridge at night. And yes, you can connect the M3 Hub to Apple Home via HomeKit or Matter; however, since the Matter standard doesn’t natively support alarm panels yet, the HomeKit integration is currently the better way to expose the alarm controls.

Theoretically, you can connect an Aqara Hub to Apple Home via Matter and HomeKit simultaneously, but then all Zigbee devices connected to that hub will appear twice in Apple Home. I personally have my Aqara hubs connected to Apple Home only via HomeKit, except for one additional hub connected via Matter with no Zigbee devices attached. This way, I can use Aqara’s Matter signals without getting duplicate devices.

It might sound a bit complicated, but if you build it step by step, it’s not that difficult.

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Hi,
Thank you again for your answers, that’s perfect I now have the full picture of how I’ll setup my system. Everything I wished seems supported so I’m actually very impressed I wasn’t expecting that much !
Have a nice weekend :slight_smile:

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