# Ambient Weather WH31SM

*Ambient Weather / WH31SM*

> The Ambient Weather WH31SM is a soil moisture sensor that adds to the WS-1965, WS-2000, WS-4000 and WS-5000 stations. It needs console firmware V2.0.2 or later and Wi-Fi firmware 4.3.6 or later. It suits Google Home and Alexa users, with native support through the maker's hub.

- Canonical page: https://smarthomecanon.com/devices/ambient-weather-wh31sm
- Last checked: 2026-10-20

## Key facts

| Fact | Value |
| --- | --- |
| Brand | [Ambient Weather](https://smarthomecanon.com/brands/ambient-weather) |
| Category | Soil moisture sensor |
| Model numbers | WH31SM |
| Status | Current[^1] |
| Type | Soil moisture sensor[^1] |
| Connectivity | Through a compatible Ambient Weather station[^1] |
| Power | unknown |
| Works with | Alexa; Google Home[^1] |

## Integration paths

**How the Ambient Weather WH31SM connects**

| Path | Requires | Local | Features lost |
| --- | --- | --- | --- |
| [Proprietary + hub](https://smarthomecanon.com/protocols/proprietary-gateway) | Ambient Weather WS-1965, WS-2000, WS-4000 or WS-5000 station with console firmware V2.0.2 or later and Wi-Fi firmware 4.3.6 or later[^1] | unknown | unknown |

**Platform support for the Ambient Weather WH31SM**

| Path | Platform | Support | Integration |
| --- | --- | --- | --- |
| Proprietary + hub | [Amazon Alexa](https://smarthomecanon.com/platforms/alexa) | Native[^1] |  |
| Proprietary + hub | [Google Home](https://smarthomecanon.com/platforms/google-home) | Native[^1] |  |
| Proprietary + hub | [Homey](https://smarthomecanon.com/platforms/homey) | withheld | com.ambient.weather |

## Related pages

- [Ambient Weather weather stations and sensors](https://smarthomecanon.com/lines/ambient-weather-stations) (line)
- [Ambient Weather](https://smarthomecanon.com/brands/ambient-weather) (brand)
- [Proprietary radio with a hub](https://smarthomecanon.com/protocols/proprietary-gateway) (protocol)
- [Amazon Alexa](https://smarthomecanon.com/platforms/alexa) (platform)
- [Google Home](https://smarthomecanon.com/platforms/google-home) (platform)
- [Homey](https://smarthomecanon.com/platforms/homey) (platform)

## Sources

[^1]: Ambient Weather WH31SM product page. https://ambientweather.com/wh31sm-soil-moisture-sensor (manufacturer, checked 2026-10-20)