Shelly Blu Door/Window Black - Smart Bluetooth Montion Sensor Alarm, Home Security, Remote Control Detector, App Alerts, Alexa & Google Home, Gateway Required, Scene Activation, Lux Sensor

When automating door and window events, bulky white plastic blocks stuck to dark frames or modern timber finishes look terrible. This black Shelly BLU unit completely solves the cosmetic headache while outperforming traditional sub-GHz or Wi-Fi contact sensors. Connectivity & Response: Instantaneous Triggers: Using Bluetooth Low Energy (BLE), the latency is virtually zero. The moment a contact breaks, the event packet transmits immediately without the brief wake-up lag common to budget battery sensors. Range & Beaconing: Paired seamlessly via existing Shelly Plus or Pro devices acting as BLE gateways. Signal propagation through interior walls is solid and hasn't dropped a single state change. Telemetry Beyond Contact: The integrated light (lux) sensor and tilt angle detection add genuine practical value, allowing for combined lux-and-motion lighting automations from a single compact enclosure. Design & Footprint: The black housing is sleek, low-profile, and blends invisibly into dark surrounds. The adhesive pads hold firmly, and the magnetic gap tolerance is generous enough to accommodate standard door clearances without constant realignment. i use it on a secret door into my utilty room to bring the lights on when dark on entry, it activates instantly! A refined, ultra-fast sensing solution that prioritises clean aesthetics without sacrificing technical reliability. Highly recommended -

Low profile and work well

The button to switch it on did not work. I had to return it to the store.

The Bluetooth devices aren't the easiest to get setup but once you do they work really well. Works really well with Home Assistant and its Bluetooth relays

I have 8 of these and some of them came with flat batteries. They have no lights or UI so if I had not already known that my setup process to HomeAssistant had worked before then I would have assumed that they were DOA. I had spare CR2032 so could quickly swap the battery to figure which ones were flat but this was not a good experience. They have a proximity, tilt and luminance in a tiny inconspicuous package and would get 5* if not for the lack of a plastic pull tag to ensure the battery did not go bad in the supply chain.

I have bought 8 items and all of them was 0% battery

Arrived with an empty battery and an instruction manual for a totally different product.

I added this to a smart home setup and it has worked really well so far. It is a compact Bluetooth door and window sensor that detects when something opens or closes and can trigger notifications or automation scenes. Installation was simple. It mounts with adhesive and the sensor and magnet align easily on a door or window frame. Once installed it disappears pretty well visually because the device is small and lightweight. One thing I like about this sensor is that it does more than just detect open and close. It also measures tilt angle and light levels, which opens up some additional automation possibilities depending on how you are using it. Battery life is rated up to around five years using a coin cell battery, which is nice because it means you are not constantly swapping batteries like some sensors. Overall this is a solid little sensor if you are building out a smart home or security setup. It is easy to install, integrates with automation platforms, and gives you reliable notifications whenever a door or window is opened.

Out of 6 door window sensors purchased, 5 failed with battery dead on arrival = 83% failure rate! 2 were black and 4 were brown. All brown failed and 1 black failed. All batteries were tested to have 0.1 volt, whereas a new battery reads 3.35 volt approximately. After testing each failing device with a good battery I was able to install the latest firmware. Shelly is clearly at fault here for not packing a thin sheet of material in the battery housing to prevent battery consumption while in storage and can be withdrawn by the purchaser. The bottom line is that a battery adds an extra cost of approximately 20% to the purchase price. I do not intend to buy any more of the brown sensors because there is obviously a poor quality control issue along with the higher price that is totally unjustified.

... Tür/Fenstersensor meiner Hausautomation. Gründe: - so klein, dass er in den Rahmen der Tür, des Fensters passt und nicht sichtbar ist - über die shelly BLE-app läßt sich a) beacon abschalten: Batterie hält länger b) Firmware updaten - Einfache und funktionale Integration in Home Assistant - Schnelle Reaktion - Zuverlässige Verbindung BLE/Wifi gateway erforderlich. z.B. einer der Shelly mit Bluetooth. Dort in den Einstellungen: "Enable Bluetooth Gateway" Habe auch jede Menge Zigbee-sensoren. Weniger zuverlässig, Batterie hält weniger lang, Reaktionszeit höher, größeres Gehäuse. Umständlicher Betreib ohne Cloud (z.B. Tuya, Smartlife, ...)

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Finalmente ciò che cercavo per il controllo degli accessi. L’unico appunto è che sono arrivati con le batterie scariche e non riuscivo ad accoppiarli al gateway. Appena le ho sostituite si sono accoppiati immediatamente. Chiaramente è necessario il suo gateway