Menu

SONOFF S40 Wi-Fi

SONOFF / S40TPA, S40TPB, S40TPA Lite, S40TPB Lite

Last checked

Amazon links here are plain search links and earn this site no commission. Disclosure

SONOFF iPlug S40 Wi-Fi smart plug, US type
Image: SONOFF

Does the SONOFF S40 Wi-Fi work with HomeKit, Alexa, and Google Home?

The S40 Wi-Fi (S40TPA and S40TPB, plus the S40 Lite versions) is a compact plug that joins Wi-Fi.

It works with Alexa and Google Home, comes in Type A and Type B, and can show energy use in the Alexa Energy Dashboard. It suits HomeKit, Google Home, Alexa, SmartThings and Home Assistant users through an integration (a Matter bridge).

At a glance: works withHow this is decided: cited platform facts only
HomeKit
Yes[1]
Matter via Bridge, via integration
Google Home
Yes[1]
Matter via Bridge, via integration; 1 other path
Alexa
Yes[1]
Matter via Bridge, via integration; 1 other path
SmartThings
Yes[1]
Matter via Bridge, via integration
Home Assistant
Yes[1]
Matter via Bridge, via integration; 1 other path

Key facts

SONOFF S40 Wi-Fi facts

How facts are sourced: every cell cites its source below
FactValue
StatusCurrent[1]
List price$10.90[1] as of
RadioWi-Fi 2.4 GHz[1]
Plug typeType A and Type B[1]
Max load1800 W (Type B), 1500 W (Type A)[1]
Energy monitoringThrough the Alexa Energy Dashboard[1]
Zigbee routerunknown

Integration paths

How the SONOFF S40 Wi-Fi connects

3 pathsHow facts are sourced: every cell cites its source below
PathRequiresiLocaliFeatures lostPlatformsi
Matter via BridgeeWeLink CUBE OS Matter bridge[1]Yes[1]unknown
Wi-Fi localeWeLink app, Phone and plug on the same local network[1]Yes[1]unknown
Wi-Fi cloudeWeLink app[1]unknownunknown
About these columns
Requires
Hardware the path needs beyond the device and a controller.
Local
Yes when control on this path keeps working with the internet down.
Platforms
The platforms that work with the device on this path: Native (out of the box), Via integration (needs an add-on) or Not supported.

Home Assistant and Homey

Ways to add the SONOFF S40 Wi-Fi

1 routeHow facts are sourced: every cell cites its source below
PlatformLeveliIntegrationDetailsEvidenceLimitations
Home AssistantCommunity[2][3]AlexxIT/SonoffLANWi-Fi local
  • Quality: Custom[2][3]
  • Works with Home Assistant: Not certified[2][3]
Model namedLimited: Power, current and voltage updates over the cloud connection stopped in 2026.[2][3]
About these columns
Level
How the device gets into the platform on this route. The headline is the best route: local before cloud, direct before bridged, core before community. The methodology page lists every level.

Cite this page

SONOFF S40 Wi-Fi. Smart Home Canon. https://smarthomecanon.com/devices/sonoff-s40-wi-fi. Last checked 2026-10-20.

Sources

  1. [1]
    MFRsonoff.tech / SONOFF store: SONOFF iPlug Series Wi-Fi Smart Plug – S40 & S40 Lite
    Accessed Back to text
  2. [2]
    DBgithub.com / GitHub: AlexxIT/SonoffLAN (HACS default list)
    Accessed Back to text
  3. [3]
    DBgithub.com / SonoffLAN: Devices
    Accessed Back to text