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SiterwellSensors

Siterwell GS886A-MTAT

CSA Certified

The Siterwell GS886A-MTAT is Matter certified (certificate CSA25F89MAT48859-24, certified Dec 9, 2025). It uses Thread, so it needs a Thread border router as well as your platform’s Matter controller. A certified Matter device can be added to any Matter controller whose app supports its device type, such as Apple Home, Google Home, Alexa, SmartThings or Home Assistant; features vary by app. The maker hasn’t named platforms on a page we hold. We have no verified store link for it yet.

Certificate data: CSA ledger read . Set-up steps and sources: Apple Home · Google Home · Alexa · SmartThings · Home Assistant

CSA Matter certified (certificate CSA25F89MAT48859-24). Uses Thread, so it needs a Thread border router as well as your platform’s Matter controller.

At a glance: Matter certified: Yes, Dec 9, 2025 · Connectivity: Thread, Bluetooth · Platforms: Apple Home, Amazon Alexa and Google Home (listed in its catalog record, unverified) · Thread border router: Needed (uses Thread)

Works with
Matter certified as a smoke CO alarm, so it can work with Matter apps such as Apple Home, Google Home, Alexa and SmartThings when the app supports its device type; supported features vary by app. The maker hasn’t named platforms on a page we hold.
CSA certificate
CSA25F89MAT48859-24, certified Dec 9, 2025
Network & hub
Thread; needs a Thread border router as well as your platform’s Matter controller
Model number
GS886A-MTAT

Updated : the last change to this page’s certification, platform or store facts.

Not sold by a US store we can verify. Similar CSA-certified smoke and CO alarms you can buy:

Independent guide. We may earn a commission through affiliate links. Direct non-affiliate links are labeled. How our links work

Why these: we have no US store link we can verify for this exact model. Each is a different product, certified by the CSA as the same device type, smoke CO alarm, with a CSA certificate for its own model and a store link we checked. Models on the same network (Thread) come first; the order is not a ranking.

Siterwell GS886A-MTAT Matter smart sensor

No US store link yet

We link to a store only after its listing matches this exact model, region and package.

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Matter 1.4 certificate

Its certificate, CSA25F89MAT48859-24, is for Matter 1.4, certified Dec 9, 2025. The Matter version is the specification version on the certificate's ledger record.

Source: CSA Distributed Compliance Ledger, read Nov 10, 2026.

What Matter 1.4 added, and which devices use it →

Siterwell GS886A-MTAT is a smart sensor. It is listed as a Thread device, so Matter setup needs a Thread border router such as a HomePod mini or a Google Nest Hub (2nd gen). It is CSA Matter certified (December 9, 2025), so it can work with Matter apps such as Apple Home, Google Home, Alexa and SmartThings when the app supports its device type; supported features vary by app.

ThreadBluetooth

Specifications

Brand
Siterwell
Category
Sensors
Protocols
Thread, Bluetooth
Certificate ID
CSA25F89MAT48859-24
Certified
Dec 9, 2025
Model
GS886A-MTAT
Firmware
V01.06

Ecosystem compatibility

Matter
Apple HomeUnverified
AlexaUnverified
Google HomeUnverified

Unverified: listed in its catalog record, not confirmed by the maker; check exact controller support.

Quick answers

Is the Siterwell GS886A-MTAT Matter certified?
Yes. MatterCatalog matches it to CSA Matter certificate CSA25F89MAT48859-24, certified Dec 9, 2025.
Does the Siterwell GS886A-MTAT work with Apple Home or HomeKit?
Likely. It is Matter certified (certificate CSA25F89MAT48859-24), so any Matter controller whose app supports its device type can add it. The maker hasn’t named Apple Home on a page we hold. Apple says an iPhone using iOS 18 or later can add Matter accessories to the Home app without a home hub. A Thread accessory needs a Thread-enabled home hub such as an Apple TV 4K, HomePod (2nd generation) or HomePod mini, or a compatible third-party Thread border router.

Add a Matter device to Apple Home

Does the Siterwell GS886A-MTAT work with Google Home?
Likely. It is Matter certified (certificate CSA25F89MAT48859-24), so any Matter controller whose app supports its device type can add it. The maker hasn’t named Google Home on a page we hold. Google says you need a Matter-enabled hub device set up on your home wireless network before you can add Matter devices to Google Home. A Thread device needs a hub that is also a Thread border router: Google Home Speaker (2026), Nest Hub (2nd gen), Nest Hub Max, Nest Wifi Pro (Wi-Fi 6E) or Google TV Streamer (4K).

Add a Matter device to Google Home

Does the Siterwell GS886A-MTAT work with Alexa?
Likely. It is Matter certified (certificate CSA25F89MAT48859-24), so any Matter controller whose app supports its device type can add it. The maker hasn’t named Alexa on a page we hold. Alexa needs a Matter-compatible Echo; Amazon says its Echo devices support “a subset of Matter 1.5 and lower device types”, so check that yours does. A Thread device needs an Echo with a built-in Thread border router, such as the Echo (4th Gen) or Echo Hub.

Add a Matter device to Alexa

Does the Siterwell GS886A-MTAT work with Samsung SmartThings?
Likely. It is Matter certified (certificate CSA25F89MAT48859-24), so any Matter controller whose app supports its device type can add it. The maker hasn’t named SmartThings on a page we hold. SmartThings adds Matter devices through the SmartThings app and a Matter controller. Samsung says a Thread device needs a Matter controller that includes a Thread border router; the latest SmartThings Hub, SmartThings Station, Samsung TVs and Samsung Family Hub refrigerators have a Thread border router built in.

Add a Matter device to SmartThings

Does the Siterwell GS886A-MTAT work with Home Assistant?
Likely. It is Matter certified (certificate CSA25F89MAT48859-24), so any Matter controller whose app supports its device type can add it. The maker hasn’t named Home Assistant on a page we hold. Home Assistant says: “Adding a new Matter device only works in the Home Assistant Companion app.” A Thread device needs a Thread border router, which Home Assistant describes as a network device that connects a Thread mesh network to other IP networks such as Ethernet or Wi-Fi.

Add a Matter device to Home Assistant

Does the Siterwell GS886A-MTAT use Thread or Wi-Fi?
Thread. Its catalog record lists Thread, and Matter devices that use Thread need a Thread border router in the home, in addition to your platform’s Matter controller.
Does the Siterwell GS886A-MTAT need a hub or a Thread border router?
Yes: a Thread border router, in addition to your platform’s Matter controller. A Thread border router connects Thread devices to your home network; Apple TV 4K, HomePod mini, Nest Hub (2nd gen) and Echo (4th Gen) are examples, and each platform lists its own.

Which devices are Thread border routers

When was the Siterwell GS886A-MTAT Matter certified?
The CSA certified it on Dec 9, 2025 (certificate CSA25F89MAT48859-24). That is its certification date, not a retail release date, which MatterCatalog does not state.

From this product’s catalog record, not hands-on testing. Editorial policy

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