Product Library / Plugs & Outlets

Research profile · verified 2026-10-01 · sources re-checked 2026-11-02

Legrand radiant Smart 15A Receptacle with Wi-Fi, Matter-Enabled, White (WWMRR15WH)

⚠ Similar names, different products: Legrand sells two unrelated smart-home lines in the same house, and Home Assistant's own documentation is where the confusion bites: the 'Legrand' integration in Home Assistant is a virtual integration handled by the Netatmo integration, covering Legrand's Netatmo-based Home + Control range over a cloud connection. This receptacle is not part of that range — it is a radiant Collection Matter-over-Wi-Fi device, and the way to reach it in Home Assistant is the Matter integration, not the one with Legrand's name on it. Legrand also fields several near-identically-titled radiant Matter devices (a Smart Switch, a Smart LED Dimmer, a Smart 15A Plug-In Switch, a Smart Outdoor Dual Output Plug); this record covers the in-wall receptacle only.

Compatibility at a glance

Does it work with your home?

[1][10][16]
[1][10][16]
[1][10][16]
[1][9][10][16][18]
[2][12][13][17][22]

Choose your platform to see its setup and functions. Your choice carries across product pages.

A connection can work while individual controls or automations remain unconfirmed. Read the connection details ↓

Protocols: WIFI · MATTER[1][5][10][16]

Before you buy

What do you need to make it work?

A hub or controller is required

Choose a platform above for its connection. A hub can be optional for the device itself and required for a platform or automation.

Required for the device

Matter controller

Yes for every ecosystem path, and Legrand states it as a flat condition of use rather than as a footnote: 'Matter Controller Required: A compatible Matter controller is required for successful installation.' In practice that means an iPhone on iOS 18 or later for Apple Home (a HomePod, HomePod mini or Apple TV for control away from home and automations), a Matter-capable Echo for Alexa, a Matter-capable Google hub for Google Home, or a SmartThings hub — Legrand maintains its own controller list at legrand.us/matter. There is no Wi-Fi-only vendor-app path that works without one, which is a real difference from most Wi-Fi outlets in this subcategory.[1][10][14][15][16][19][20]

One device can provide more than one role. These are setup requirements, not a shopping list of separate purchases.

What could you do with this?

Put its functions to use.

Research, not hands-on testing

Start with a documented control or event. The selected connection shows what is confirmed for that platform.

Documented device function

On/off

The device supports this control.

Compare its platform availability in the table below.

Setup and sources

Device documentation: [11] [16]

A documented control or event is one part of a setup. It does not by itself establish a complete automation.

The functions, side by side

What can you use, and where?[11][16]

A platform connection does not confirm every function. Controls and reported events are shown separately from what an automation can use.

Controls
1 documented
Reported events
Not established from vendor documentation

Compare all five platforms. On a narrow screen, scroll the table sideways.

Documented device functions, platform controls and automation availability
Device functionApple HomeWorks[1][10][16]Google HomeWorks[1][10][16]AlexaWorks[1][10][16]SmartThingsWorks[1][9][10][16][18]Home AssistantWorks[2][12][13][17][22]
On/offDevice control
Control

Supported for this Matter device type

Automation

✓ Listed for this device type

Control

Supported for this Matter device type

Automation

✓ Listed for this device type

Control

Supported for this Matter device type

Automation

? Not stated

Control

Supported for this Matter device type

Automation

✓ Listed for this device type

Control

Supported for this Matter device type

Automation

—

✓ Documented for this connection. × A stated limit. ◐ A partial function. ? Not established. A listed device function does not establish a complete routine, its other equipment or any plan requirements.

A device-type listing describes the platform’s general support; it does not confirm this exact model.

Setup and sources

Apple Home

Legrand names Apple HomeKit in its compatibility sentence and Apple Home in its Works With row, and the route is Matter rather than a legacy HomeKit implementation — so on Apple Home an iPhone on iOS 18 or later can add and control it over Matter without a home hub, and a HomePod, HomePod mini or Apple TV is still needed to control it away from home, run automations and share control. Setup is Legrand's stated 'Simply scan the Matter QR code on the device with your smartphone's camera or smart home application'. One in-wall detail worth acting on before the wallplate goes back: the Matter code is on the device, so photograph it during installation rather than after.[1][10][16]

Google Home

Named in the same compatibility sentence and the same Works With row, reached the same way. Needs a Matter-capable Google hub rather than only the Google Home app on a phone. Same single-controlled-outlet limit.[1][10][16]

Alexa

Matter is the whole mechanism and Legrand names Alexa directly: 'Device comes with Matter built-in, allowing for greater interoperability and compatibility with the latest smart home assistants and platforms – including Apple HomeKit, Google Home, Amazon Alexa and Samsung SmartThings', with the specification table's Works With row repeating 'Amazon Alexa, Apple Home, Google Home, Matter, Samsung SmartThings'. The cost is the controller: you need a Matter-capable Echo, not just the Alexa app, and Legrand states the requirement without hedging. The upside is that commissioning is a QR scan and no Legrand app or account is involved. Only the top outlet appears as a controllable thing — the always-on half is invisible to every platform.[1][10][16]

SmartThings

Samsung SmartThings is named in both first-party lists and joins through the same Matter commissioning flow, requiring a SmartThings hub capable of acting as a Matter controller. Nothing SmartThings-specific is documented beyond that, so expect on/off of the controlled outlet and no more.[1][9][10][16][18]

Home Assistant

Neither side names the other here: Legrand does not name Home Assistant, and Home Assistant does not name this receptacle. The route is the Matter standard. The Matter ledger lists this model, part number WWMRR15WH, as certified, and Home Assistant's Matter integration controls on/off on Matter devices, so the top, controlled outlet switches on and off from Home Assistant through its own Matter Server app; the bottom outlet is always on. Home Assistant's page called 'Legrand' is a different thing: it covers Legrand's Netatmo-family devices through the Netatmo integration, not this receptacle.[2][12][13][17][22]

Device documentation: [11] [16]

Listed device functions are established from vendor documentation. An ability missing here is unestablished, not necessarily absent.

Connection details and setup sources
EcosystemSupportThe catch
Amazon AlexaWorksWorks with this ecosystem[1][10][16]Matter is the whole mechanism and Legrand names Alexa directly: 'Device comes with Matter built-in, allowing for greater interoperability and compatibility with the latest smart home assistants and platforms – including Apple HomeKit, Google Home, Amazon Alexa and Samsung SmartThings', with the specification table's Works With row repeating 'Amazon Alexa, Apple Home, Google Home, Matter, Samsung SmartThings'. The cost is the controller: you need a Matter-capable Echo, not just the Alexa app, and Legrand states the requirement without hedging. The upside is that commissioning is a QR scan and no Legrand app or account is involved. Only the top outlet appears as a controllable thing — the always-on half is invisible to every platform.In Amazon Alexa you also need: a Matter controller
Google HomeWorksWorks with this ecosystem[1][10][16]Named in the same compatibility sentence and the same Works With row, reached the same way. Needs a Matter-capable Google hub rather than only the Google Home app on a phone. Same single-controlled-outlet limit.In Google Home you also need: a Matter controller
Apple HomeWorksWorks with this ecosystem[1][10][16]Legrand names Apple HomeKit in its compatibility sentence and Apple Home in its Works With row, and the route is Matter rather than a legacy HomeKit implementation — so on Apple Home an iPhone on iOS 18 or later can add and control it over Matter without a home hub, and a HomePod, HomePod mini or Apple TV is still needed to control it away from home, run automations and share control. Setup is Legrand's stated 'Simply scan the Matter QR code on the device with your smartphone's camera or smart home application'. One in-wall detail worth acting on before the wallplate goes back: the Matter code is on the device, so photograph it during installation rather than after.
SmartThingsWorksWorks with this ecosystem[1][9][10][16][18]Samsung SmartThings is named in both first-party lists and joins through the same Matter commissioning flow, requiring a SmartThings hub capable of acting as a Matter controller. Nothing SmartThings-specific is documented beyond that, so expect on/off of the controlled outlet and no more.In SmartThings you also need: a Matter controller
Home AssistantWorksWorks with this ecosystem[2][12][13][17][22]Neither side names the other here: Legrand does not name Home Assistant, and Home Assistant does not name this receptacle. The route is the Matter standard. The Matter ledger lists this model, part number WWMRR15WH, as certified, and Home Assistant's Matter integration controls on/off on Matter devices, so the top, controlled outlet switches on and off from Home Assistant through its own Matter Server app; the bottom outlet is always on. Home Assistant's page called 'Legrand' is a different thing: it covers Legrand's Netatmo-family devices through the Netatmo integration, not this receptacle.In Home Assistant you also need: a Matter controller

Plans and ongoing costs[1][10][16]

✓ Works without a subscription: Yes.

Vendor account required: No — no vendor account is involved.[1][10][16]

No plan, paid tier or recurring charge appears anywhere on Legrand's product page, and the architecture leaves nowhere obvious to put one — Legrand states the device needs no manufacturer application at all for onboarding, so there is no Legrand account or service in the control path to attach a fee to. So we record no subscription on that basis. The honest limit is that this is the absence of paywall language on a first-party page rather than an explicit 'no subscription' statement.

Maintenance and offline use[1]

Who it's for

A household that already runs a Matter controller and wants a controlled receptacle that answers to the platform directly, with no manufacturer app, no account and no cloud between the switch and the outlet. It suits anyone standardising on Matter and anyone who specifically wants control that survives an internet outage, and the included screwless wall plate makes it a tidy swap in a room already using radiant trim. Look elsewhere if there is no Matter controller in the house and no plan to add one, if both outlets need to be controllable, if the network is 5 GHz only, if the location is damp or outdoors, or if a one-year warranty on an in-wall device is not acceptable.

Check availability at radiant

This opens radiant's own website. We earn nothing from this link.

Sources & method

Numbered sources below back the facts marked with the matching number above. This is a research profile: compiled from manufacturer documentation, certification registries, and published testing — we state facts, not verdicts, and we have not physically tested this unit. How we work →

23 numbered sources· read them in the source's own words
  1. [1] legrand.us product page 'radiant® Smart 15A Receptacle with Wi-Fi, Matter-Enabled, White' (WWMRR15WH) — Read on the maker's own site, verified 2026-08-16
    Backs: Product identity, Price, Protocols, Works without the internet, Required hub or bridge, Installation, Vendor account required, Subscription, Security-update support period, Market availability, Amazon Alexa compatibility, Google Home compatibility, Apple Home compatibility, SmartThings compatibility
    page changed on 2026-11-02, after this reading
  2. [2] home-assistant.io/integrations/legrand (Home Assistant's Legrand virtual-integration page) read alongside home-assistant.io/integrations/matter — Read the platform's own documentation, verified 2026-08-16
    Backs: Home Assistant compatibility
  3. [3] Record created 2026-08-16 from legrand.us (product page) and home-assistant.io (Matter and Legrand integration documentation) — Read on the maker's own site, verified 2026-08-16
    Backs: Research status
  4. [4] legrand.us product page, radiant Smart 15A Receptacle with Wi-Fi, Matter-Enabled (WWMRR15WH) — Read on the maker's own site, verified 2026-08-16
    Backs: Power source
    page changed on 2026-11-02, after this reading
  5. [5] Confirmation pass, 2026-08-20: this record's existing protocol evidence was re-read against our settled definition of which radios count as the device's own (what the DEVICE ITSELF speaks; something reachable only through a bridge is recorded as an ecosystem or hub answer instead). No outside page was read for this entry — the evidence already on this record was re-examined, and the entry states what it establishes., verified 2026-08-20
    Backs: Protocols
  6. [6] https://www.legrand.us/wiring-devices/smart-lighting/radiant-smart-15a-receptacle-with-wi-fi-matter-enabled-white/p/rd-wwmrr15wh (read 2026-09-09). For wifiBands the page says only 'Wi-Fi Connected: Works with a home's existing secure 2.4 GHz Wi-Fi network' — a network requirement, not an enumeration of the radio's bands, and our standing bar rules that such ambiguity leaves the answer unrecorded. For appPlatforms the page links no app store and names no platform. Both stay unanswered, recorded as checked and not published rather than never-looked-at. — Read on the maker's own site, verified 2026-09-09
    page changed on 2026-11-02, after this reading
  7. [7] the record's own customer-facing prose fields as they stood before 2026-09-11 (no new external read), verified 2026-09-11
  8. [8] Legrand's own legrand.us product page for the radiant Smart 15A Receptacle (WWMRR15WH), read 2026-08-16 — the same page this record already cites for the two cells this entry reasons from: that the outlet keeps working when the internet is down, and that it needs no Legrand account., verified 2026-08-16
    Backs: Service status
    page changed on 2026-11-02, after this reading
  9. [9] Samsung's Works with SmartThings partner directory, Legrand's page, read 2026-09-22. SmartThings lists this product on its own row and names the model number this record carries: "Radiant Smart Receptacle", "Model Number" "WWMRR15WH", "Category" "Outlet". — Read the platform's own documentation, verified 2026-09-22
    Backs: SmartThings compatibility
    page changed on 2026-11-02, after this reading
  10. [10] Legrand's own product page for the radiant Smart 15A Receptacle, model WWMRR15WH, read in full 2026-10-01. "$46.36 USD" with "In Stock" and an add-to-cart control. "The bottom outlet of the device is always on, while only the top outlet can be controlled." · "Wi-Fi Connected: Works with a home's existing secure 2.4 GHz Wi-Fi network." · "Local Control: Devices are designed to work when your home loses connection to the internet." · "no separate manufacturer application required for onboarding of 2nd Gen Wi-Fi devices" · "Matter Controller Required: A compatible Matter controller is required for successful installation." · "Easy Installation: Installs easily in place of an outlet, neutral wire required." · "Works With Amazon Alexa, Apple Home, Google Home, Matter, Samsung SmartThings" · "Warranty Type 1-Year Limited Warranty". No plan, fee or account is named. — Read on the maker's own site, verified 2026-10-01
    Backs: Price, Market availability, Subscription, Service status, Vendor account required, Product identity, Protocols, Wi-Fi bands it can use, Required hub or bridge, Installation, Power source, Works without the internet, Amazon Alexa compatibility, Google Home compatibility, Apple Home compatibility, SmartThings compatibility, Research status
    page changed on 2026-11-02, after this reading
  11. [11] Legrand's own product page for the radiant Smart 15A Receptacle with Wi-Fi, Matter-Enabled, White (WWMRR15WH), read in full 2026-10-04. Verbatim: "The bottom outlet of the device is always on, while only the top outlet can be controlled." · "Easy Installation: Installs easily in place of an outlet, neutral wire required. One outlet is Wi-Fi controlled, the other is always on." · "Single Controlled Outlet: Features a single controlled outlet and one always-on outlet." The page names no energy or power reading. — Read on the maker's own site, verified 2026-10-04
    Backs: Capabilities
    page changed on 2026-11-02, after this reading
  12. [12] Home Assistant's Legrand page (documentation 2026.9.4), read in full on 2026-10-04. Verbatim: "Support for devices by Legrand in Home Assistant is provided by the Netatmo integration. Legrand devices are either rebranded devices or devices that share a common communication protocol, making it possible to use them with the Netatmo integration." · "The Legrand virtual integration was introduced in Home Assistant 0.20" · "Its IoT class is Cloud Polling." The page names no radiant product and no Matter route. — Re-checked this against its sources, verified 2026-10-04
    Backs: Home Assistant compatibility
  13. [13] Legrand's own product page for the radiant Smart 15A Receptacle, model WWMRR15WH, read in full on 2026-10-04. Verbatim: "Compatibility: Device comes with Matter built-in, allowing for greater interoperability and compatibility with the latest smart home assistants and platforms – including Apple HomeKit, Google Home, Amazon Alexa and Samsung SmartThings." · "Consolidated Control: Can be controlled through any Matter compliant smart home platform's application – no separate manufacturer application required for onboarding of 2nd Gen Wi-Fi devices." · "Works With Amazon Alexa, Apple Home, Google Home, Matter, Samsung SmartThings". The page says nowhere that the receptacle is certified, and names no Home Assistant. — Re-checked this against its sources, verified 2026-10-04
    Backs: Home Assistant compatibility
    page changed on 2026-11-02, after this reading
  14. [14] Apple Support, 'Pair and manage your Matter accessories' (Published Date May 07, 2026), read 2026-10-10: "If you have an iPhone using iOS 18 or later, you can add Matter accessories to and control Matter accessories from the Home app without a home hub." · "However, for the best experience set up a home hub to add supported Matter and thread-based accessories to the Home app." — Read the platform's own documentation, verified 2026-10-10
    Backs: Required hub or bridge
    page unchanged as of 2026-11-02
  15. [15] Apple Support, 'Set up your HomePod, HomePod mini, or Apple TV as a home hub' (Published Date September 15, 2025), read 2026-10-10: "Set up a home hub to control your smart home accessories while you're away from home, share control of your accessories with others, and automate your accessories to do what you want, when you want." — Read the platform's own documentation, verified 2026-10-10
    Backs: Required hub or bridge
    page unchanged as of 2026-11-02
  16. [16] Legrand's own product page for the radiant Smart 15A Receptacle, model WWMRR15WH, read in full on 2026-10-19 through tools/page-read.mjs. Verbatim: "$46.36 USD" with "In Stock" · "The bottom outlet of the device is always on, while only the top outlet can be controlled." · "Single Controlled Outlet: Features a single controlled outlet and one always-on outlet." · "Wi-Fi Connected: Works with a home's existing secure 2.4 GHz Wi-Fi network." · "Local Control: Devices are designed to work when your home loses connection to the internet." · "Compatibility: Device comes with Matter built-in, allowing for greater interoperability and compatibility with the latest smart home assistants and platforms – including Apple HomeKit, Google Home, Amazon Alexa and Samsung SmartThings." · "Can be controlled through any Matter compliant smart home platform's application – no separate manufacturer application required for onboarding of 2nd Gen Wi-Fi devices." · "Matter Controller Required: A compatible Matter controller is required for successful installation." · "Easy Installation: Installs easily in place of an outlet, neutral wire required." · "Works With Amazon Alexa, Apple Home, Google Home, Matter, Samsung SmartThings" · "Warranty Type 1-Year Limited Warranty" · "UPC Number 785007449457". No plan, fee or account is named, and the word certified does not appear on the page. — Read the original source directly, verified 2026-10-19
    Backs: Product identity, Price, Protocols, Wi-Fi bands it can use, Power source, Installation, Required hub or bridge, Works without the internet, Vendor account required, Subscription, Capabilities, Service status, Research status, Amazon Alexa compatibility, Google Home compatibility, Apple Home compatibility, SmartThings compatibility
    page changed on 2026-11-02, after this reading
  17. [17] Home Assistant's Legrand page (documentation 2026.10.2), read in full on 2026-10-19 through tools/page-read.mjs. Verbatim: "Support for devices by Legrand in Home Assistant is provided by the Netatmo integration. Legrand devices are either rebranded devices or devices that share a common communication protocol, making it possible to use them with the Netatmo integration." — Read the platform's own documentation, verified 2026-10-19
    Backs: Home Assistant compatibility
  18. [18] Samsung's Works with SmartThings partner directory, Legrand's page, read on 2026-10-19 through tools/page-read.mjs --rendered --expand (the plain read no longer carries the device list). Verbatim: "Radiant Smart Receptacle Model Number WWMRR15WH Category Outlet". — Read the original source directly, verified 2026-10-19
    Backs: SmartThings compatibility
    page changed on 2026-11-02, after this reading
  19. [19] Apple Support, 'Pair and manage your Matter accessories' (Published Date May 07, 2026), read in full on 2026-10-19 through tools/page-read.mjs. Verbatim: "If you have an iPhone using iOS 18 or later, you can add Matter accessories to and control Matter accessories from the Home app without a home hub." · "However, for the best experience set up a home hub to add supported Matter and thread-based accessories to the Home app." — Read the platform's own documentation, verified 2026-10-19
    Backs: Required hub or bridge
    page unchanged as of 2026-11-02
  20. [20] Apple Support, 'Set up your HomePod, HomePod mini, or Apple TV as a home hub' (Published Date September 15, 2025), read in full on 2026-10-19 through tools/page-read.mjs. Verbatim: "Set up a home hub to control your smart home accessories while you're away from home, share control of your accessories with others, and automate your accessories to do what you want, when you want." — Read the platform's own documentation, verified 2026-10-19
    Backs: Required hub or bridge
    page unchanged as of 2026-11-02
  21. [21] The Matter Distributed Compliance Ledger's model list for vendor 4129, read on 2026-10-19 through tools/page-read.mjs and node tools/dcl-lookup.mjs models 4129. node tools/dcl-lookup.mjs vendors legrand matched one vendor, VID 4129 'Legrand Group'; vendors "Pass & Seymour" matched none. In our words: the list holds seven models, one of them PID 7 named 'Radiant Smart Receptacle' with part number WWMRR15WH. — Checked a certification register, verified 2026-10-19
  22. [22] The Matter Distributed Compliance Ledger's compliance record for VID 4129, PID 7, software version 202406201, read on 2026-10-19 through tools/page-read.mjs and node tools/dcl-lookup.mjs cert 4129 7. In our words: the ledger shows that version certified for Matter under certificate CSA24244MAT43255-24, dated 19 April 2024, with Wi-Fi and Bluetooth as transports. — Checked a certification register, verified 2026-10-19
    Backs: Home Assistant compatibility
  23. [23] Matter Distributed Compliance Ledger, the model list registered to vendor ID 4129 (Legrand), read 2026-10-19 via tools/dcl-lookup.mjs (walked to pagination exhaustion) and through tools/page-read.mjs: seven models are filed there, and exactly one of them carries part number WWMRR15WH, the Radiant smart receptacle filed at product ID 7. — Checked a certification register, verified 2026-10-19
    Backs: Certification and product IDs

Compatibility and lifecycle information reflects the last-verified date above and can change without notice (firmware updates, cloud-service changes, discontinuations). It is provided as-is, for information — verify with the manufacturer before purchasing. Spot an error? Tell us and we'll fix it. Full terms: Terms of Service.

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