
Open the door or walk into the hallway and the light comes on by itself, but only when it is dark. The door contact warns you if the door is left open or if it opens while you are out. Aqara P2 sensors on Thread, a T1 relay module behind the switch and the M100 hub, managed from the Aqara Home app and Matter compatible.
What it does
- The P2 motion and light sensor detects anyone walking past and measures the brightness: the light comes on only when it is really needed.
- The P2 door sensor reports every opening: in the evening it switches the light on, and while you are out it sends you a notification.
- The T1 relay module, behind the existing switch, turns the hall light on and off; the switch keeps working.
- After a few minutes with no movement the light switches itself off.
- The app shows the history of openings and lets you switch the light remotely.

How to install it
What's in the kit

| Qty | Item | Unit price | Subtotal |
|---|---|---|---|
| 1 | Aqara Hub M100 Matter/ThreadCoordinator / gateway | €35.99 | €35.99 |
| 1 | Aqara P2 Thread motion and light sensorMotion sensor | 39,99 € | 39,99 € |
| 1 | Aqara P2 Thread door/window sensorDoor/window sensor | €37.99 | €37.99 |
| 1 | Aqara T1 relay module with neutralRelay / switch | €36.90 | €36.90 |
| 1 | Wago 221-413 lever connectors, 10 piecesAccessory: connections · connections for the modules | €8.99 | €8.99 |
| 1 | USB power adapters 5V 2A, 3 piecesAccessory: power supply · needed because the device comes without a power adapter | €10.99 | €10.99 |
| Kit total | €170.85 |
Recommended options
| Qty | Item | When it's needed | Price |
|---|---|---|---|
| 1 | Deep flush-mount 503 back boxes, 5 pieces | if the module won't fit behind the switch mechanism | €9.23 |
| 1 | Gewiss junction box 118x96x70 | alternatively, modules in the junction box | €6.58 |
| Options total | €15.81 |
Prices taken from Amazon.it on 22/09/2026: they can change, and the price shown by Amazon at the time of purchase is the one that applies.
Add the whole kit to your Amazon basket6 items, 6 pieces · optional extras are added from the individual linksDelivery, returns and warranty: Amazon shows these at the time of purchase.
Before you order
Do you need a hub?
Yes: the included Aqara M100 hub links the Thread sensors and the Zigbee relay module and brings them into the Aqara Home app. It is USB-powered from the adapter supplied in the kit and connects to the home Wi-Fi. Without the hub the kit's devices do not work.
Does it work with Alexa, Google and Apple?
The M100 hub supports Matter: the devices in the kit can be brought into Alexa, Google Home and Apple Home through Matter, as stated by the manufacturer. The fuller functions, such as history and advanced automations, stay in the Aqara Home app.
Do you need an electrician?
For the relay module, yes: it runs at 230V and has to be wired behind the switch, with the neutral, by qualified personnel with the system isolated. The hub and the sensors you can fit yourself, with a USB power supply and double-sided tape.
What if there is no neutral in the back box?
The kit's T1 module needs a neutral. If there is none in the switch back box, the electrician can bring it over from the junction box; alternatively, there are modules that work without neutral. Write to us from the contacts section before buying and we will point you to the right solution.
What happens if the internet goes down?
The switch keeps controlling the light. Automations between the sensors and the module on the same hub stay active locally, as stated by the manufacturer; without internet, though, you get no notifications and cannot control anything from outside the home.
Are batteries included?
The P2 sensors run on a battery, supplied in the box as stated by the manufacturer. The charge level is shown in the Aqara Home app. The hub and the relay module are mains powered and have no batteries.
Can I add devices?
Yes: more window sensors, a motion sensor for the hallway, more relay modules or a compatible lock. The M100 hub handles many Aqara Zigbee and Thread devices in the same app.
What if a product is out of stock on Amazon?
An item can go out of stock or switch to a new version. Write to us from the contacts section with the kit code: we'll point you to an alternative that works with the other devices and with the coordinator, so the kit stays complete and performs as intended.
Why buy on Amazon?
Purchase, delivery, returns and warranty are handled by Amazon: delivery times, returns and warranty are shown on Amazon at the moment of purchase. The kit itself was put together and tested by us, choosing devices that work with one another plus the accessories needed to install them.
Notes
Not included
- Hall lamp or ceiling light
- Router and internet connection
- A neutral in the back box, if there is none
- Electrical connections and electrician's work
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