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Shelly Flood S Gen4

Shelly / S4SN-0071Z

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Shelly Flood S Gen4, product image
Image: Shelly

Does the Shelly Flood S Gen4 work with HomeKit, Alexa, and Google Home?

The Shelly Flood S Gen4 is a compact water leak sensor with stainless-steel pads on its base and a CR123A battery included.

It has Matter over Wi-Fi by default and Zigbee as an alternate firmware. It suits Home Assistant users, with native support through Zigbee. Google Home, Alexa and SmartThings users reach it through an integration (the maker's cloud).

At a glance: works withHow this is decided: cited platform facts only
HomeKit
Unknown
Unknown
Google Home
Yes[1]
Wi-Fi cloud, via integration
Alexa
Yes[1]
Wi-Fi cloud, via integration
SmartThings
Yes[1]
Wi-Fi cloud, via integration
Home Assistant
Yes[2][3]
Zigbee, native; 1 other path

Key facts

Shelly Flood S Gen4 facts

How facts are sourced: every cell cites its source below
FactValue
StatusCurrent[4][5]
List price$27.99[6] as of
GenerationGen4[7]
Model codeS4SN-0071Z[1]
SensingWater, through stainless-steel pads[1]
Power1 CR123A battery, included (about 2 years)[1]
RadioWi-Fi 6, Bluetooth 5, Zigbee[1]
MatterBuilt in (default). Zigbee is the alternate firmware.[1][8]
Local APIHTTP API, MQTT and webhooks[1][9]

Integration paths

How the Shelly Flood S Gen4 connects

4 pathsHow facts are sourced: every cell cites its source below
PathRequiresiLocaliFeatures lostPlatformsi
Matter / Wi-FiMatter controller[1][8]unknownunknownunknown
ZigbeeHUBZigbee coordinator[1]unknownunknown
Wi-Fi localNothing extra[1][3]Yes[1][3]unknown
Wi-Fi cloudVendor cloud account[1]No[1]unknown
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 Shelly Flood S Gen4

3 routesHow facts are sourced: every cell cites its source below
PlatformLeveliIntegrationDetailsEvidenceLimitations
Home AssistantNative (local)[3]shellyWi-Fi local
  • Quality: Platinum[3]
  • IoT class: Local Push[3]
  • Works with Home Assistant: Not certified[3]
Product line namedNone stated
Home AssistantVia Zigbee/Z-Wave[2]zigbee2mqttZigbee
  • Works with Home Assistant: Not certified[2]
Model namedNone stated
HomeyOfficial app (local)[10]cloud.shelly.controlWi-Fi localModel namedNone stated
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.

Releases

  1. 2025
    1. Certified Certified, not announced [8]

Certifications

Certification records

1 recordHow facts are sourced: every cell cites its source below
ProgramCertificateCertified onTransportSpec / softwareSource
MatterCSA25430MAT45954-24wi-fi, bluetooth1.3.0-s1[8]

Cite this page

Shelly Flood S Gen4. Smart Home Canon. https://smarthomecanon.com/devices/shelly-flood-s-gen4. Last checked 2026-10-20.

Sources

  1. [1]
    MFRkb.shelly.cloud / Shelly Flood S Gen4 - Shelly Knowledge Base
    Accessed Back to text
  2. [2]
    DBzigbee2mqtt.io / Zigbee2MQTT: Shelly S4SN-0071Z
    Accessed Back to text
  3. [3]
    DOChome-assistant.io / Shelly - Home Assistant
    Accessed Back to text
  4. [4]
    MFRshelly.com / Shelly Flood S Gen4 - Shelly Europe shop
    Accessed Back to text
  5. [5]
    MFRshelly.com / Shelly Europe shop catalog (Shopify product feed, pages 1-4)
    Accessed Back to text
  6. [6]
    MFRus.shelly.com / Shelly USA store: Shelly Flood S Gen4
    Accessed Back to text
  7. [7]
    MFRkb.shelly.cloud / Shelly Gen4 devices - Shelly Knowledge Base
    Accessed Back to text
  8. [8]
    CSAon.dcl.csa-iot.org / Matter DCL compliance: Shelly Flood S Gen4, PID 6182
    Accessed Back to text
  9. [9]
    MFRshelly-api-docs.shelly.cloud / Shelly Technical Documentation
    Accessed Back to text
  10. [10]
    DOChomey.app / Homey App Store: Shelly Control
    Accessed Back to text