Product Library / Switches & Dimmers
Research profile · last verified 2026-07-29Leviton Decora Smart Wi-Fi Switch, 15A (D315S)
Compatibility
| Ecosystem | Support | The catch |
|---|---|---|
| Amazon Alexa | PartialPartial support — see the catch | Leviton names Alexa in its own installation instructions, so the support claim is first-party and not merely marketing — but NO mechanism is documented for this model. Two paths are plausible and the sources do not choose between them: Matter (the switch is Matter-certified and the sheet's only controller step is 'Connect to a Matter controller') or a My Leviton cloud account link, which is how the earlier 2nd-Gen line reached Alexa. That earlier behaviour was deliberately NOT assumed here, because Leviton's own generations page does not list D315S among the 2nd-Gen models. Recorded partial for the undocumented mechanism, following the `tailwind-iq3` precedent. |
| Google Home | PartialPartial support — see the catch | Same standing as Alexa: named in Leviton's installation instructions with no mechanism documented for this model, and two plausible paths (Matter, or a My Leviton cloud link as on the 2nd-Gen line). Not inferred from the sibling generation. |
| Apple Home | WorksWorks with this ecosystem | Coded differently from Alexa/Google deliberately, and the asymmetry is reasoned rather than arbitrary: Apple Home speaks only HomeKit or Matter, and Leviton documents NO native-HomeKit path for this model — unlike the 2nd-Gen line, which advertised HomeKit prominently. The instruction sheet carries no HomeKit branding at all and its single controller step is 'Connect to a Matter controller (optional)', while the product page says 'Matter ready out of the box'. Matter is therefore the only remaining path, not a guess. Full because on/off is this device's entire function and its certified Matter device type is On/Off Light (0x0100). Platform requirement, not a D315S spec: Leviton states that controlling Matter accessories from the Apple Home app and Siri 'requires an Apple Home hub such as a HomePod or Apple TV running the latest software', and that the Matter pairing code lives in the My Leviton app under Device Settings. |
| SmartThings | PartialPartial support — see the catch | Named in Leviton's installation instructions; mechanism undocumented for this model. This is the exact shape of the `tailwind-iq3` SmartThings cell — advertised but undocumented, recorded partial for that reason. |
| Home Assistant | PartialPartial support — see the catch | Worth a note because vendors rarely do this: Leviton lists Home Assistant by name on the D315S product page ('Works with Matter, Amazon Alexa, Google Home, Apple Home, Smart Things, Home Assistant, Sonos, Resideo and more'). But it is the WEAKEST of the five claims on this record, and the distinction is recorded rather than smoothed over: Home Assistant appears only on that marketing page and is absent from the installation instructions' own ecosystem list. No mechanism is documented. Home Assistant's community `decora_wifi` integration is cloud-polling and flagged legacy, and predates this model entirely, so it cannot be assumed to cover it; Matter is the plausible route but is not stated for this pairing. |
Protocols: WIFI · MATTER · BLUETOOTH
Subscription reality
✓ Works without a subscription: Yes.
No subscription, paid tier, or premium feature set is mentioned anywhere in Leviton's D315S specification page or its installation instructions — including in the sections covering scheduling, auto-shutoff and remote control, which are the features a vendor would normally gate. Recorded as `none` on that basis; note this rests on the absence of any paywall language in two first-party documents rather than on an explicit 'no subscription' statement.
Maintenance reality
- Cloud dependence: No — core function survives without the vendor's cloud
- Neutral wire required — the instruction sheet states it twice ('NOTE: This product requires a Neutral wire'). Ratings: 15A 120VAC 60Hz general use, 3A LED/CFL, 1/3 HP motor. Network: 802.11 b/g/n, 2.4 GHz only, WPA/WPA2/WPA3 or open; Bluetooth v5.0. Multi-location control needs companions sold separately — wired DD0SR-DLZ (up to 4) or DD0SR-01Z (up to 9) over a yellow/red traveler, max 300 ft (90 m); or up to 3 wire-free DAWSC Anywhere Switch Companions. Vendor cautions carried verbatim because they are the ones that bite: 'Do not use your switch with aluminum wire', 'Installation in metal wall boxes or with metal wall plates may result in poor RF performance', and indoor use only. Onboard memory keeps configuration and schedules and restores the last state after a power outage. Limited 1 year warranty. Installation 'requires electrical knowledge. If you are unsure of any steps, consult an electrician.'
The catch
Matter works out of the box here — which is the whole point of the model, and the opposite of the Decora Smart Wi-Fi 2nd Gen line, where Matter arrived only through an opt-in Early Access firmware update that broke an existing HomeKit pairing. The trade is that Leviton has stopped documenting a native HomeKit path, so Apple Home households now need a HomePod or Apple TV acting as a Matter controller rather than pairing the switch directly. It also needs a neutral wire, runs on 2.4 GHz Wi-Fi only, and every multi-location setup costs extra: 3-way control requires a separate companion switch (wired DD0SR or wire-free DAWSC), because a second ordinary switch will not do. One naming trap worth knowing before you shop: this is NOT the 2nd Gen switch. Leviton's own generations page names the 2nd Gen line as 'the D26HD Dimmer, D215S Switch, D23LP Mini Plug-in Dimmer and D215P Mini Plug-in Switch' — D315S is not among them, and the Matter registry files it under family SKU D36HD, the model Leviton lists as the D26HD's replacement. Leviton publishes no '3rd Gen' label for it, so this record does not invent one; treat D315S and D215S as different products despite the near-identical names.
Who it's for
A fit for a household that has a neutral wire in the box, wants a plain on/off smart switch that joins Matter without a firmware project, and controls it from Apple Home with a HomePod or Apple TV already in place. It suits loads beyond lighting too — Leviton rates it for ceiling and exhaust fans, motors and pumps up to 15A and 1/3 HP. Look elsewhere if you have no neutral wire, if your network is 5 GHz-only, or if you want three-way control without buying a matching companion switch. Alexa, Google Home, SmartThings and Home Assistant owners should know that Leviton asserts support for all four but documents how for none of them, so budget for some setup research.
Sources & method
leviton.com/content/dam/leviton/residential/product_documents/instruction_sheet/d315s-mobile-instruction-sheet-enfrsp.pdf — vendor-manual research, verified 2026-07-29 · leviton.com/products/d315s-1bw — vendor-page research, verified 2026-07-29 · csa-iot.org/csa_product/d315s/ — registry-lookup, verified 2026-07-29 · leviton.com/support/resources/product-support/decora-smart-support/articles/17734341251227-How-Do-I-Add-a-Decora-Smart-Matter-Device-to-the-Apple-Home-App — vendor-page research, verified 2026-07-29 · leviton.com/support/resources/product-support/decora-smart-support/decora-smart-wi-fi/leviton-has-released-decora-smart-wi-fi-2nd-gen-switches-and-dimmers-what-is-different-from-leviton-wi-fi-1st-gen-devices — vendor-page research, verified 2026-07-29. 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 →
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.