# Meross MST100 Smart Sprinkler Timer

*Meross / MST100HHK, MST100*

> The Meross MST100 Smart Sprinkler Timer is a battery-powered faucet sprinkler timer with a brass inlet and outlet and an IP65 rating. It works with Alexa, Siri, Google Assistant and SmartThings through a Meross hub. It suits Google Home, Alexa and SmartThings users, with native support through the maker's hub.

- Canonical page: https://smarthomecanon.com/devices/meross-mst100
- Last checked: 2026-10-16

## Key facts

| Fact | Value |
| --- | --- |
| Brand | [Meross](https://smarthomecanon.com/brands/meross) |
| Category | Valve controller |
| Model numbers | MST100HHK, MST100 |
| Status | Current[^1] |
| Type | Sprinkler timer[^1] |
| Standard | Meross hub[^1] |
| HomeKit | Voice and remote control with the MSH400 hub only[^1] |
| Scope | 1 zone[^1] |
| Sold in | US, EU, UK and AU[^1][^2] |

## Integration paths

**How the Meross MST100 Smart Sprinkler Timer connects**

| Path | Requires | Local | Features lost |
| --- | --- | --- | --- |
| [Proprietary + hub](https://smarthomecanon.com/protocols/proprietary-gateway) | A Meross hub (MSH400 or MSH450)[^1] | unknown | unknown |

**Platform support for the Meross MST100 Smart Sprinkler Timer**

| 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 | [Samsung SmartThings](https://smarthomecanon.com/platforms/smartthings) | Native[^1] |  |

## Related pages

- [Meross energy monitors, sprinkler timers and diffuser](https://smarthomecanon.com/lines/meross-energy-water-and-air) (line)
- [Meross](https://smarthomecanon.com/brands/meross) (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)
- [Samsung SmartThings](https://smarthomecanon.com/platforms/smartthings) (platform)

## Sources

[^1]: Meross Smart Sprinkler Timer Kit, MST100HHK(US Version) - Meross Official Store. https://shop.meross.com/products/smart-sprinkler-timer-us (manufacturer, checked 2026-10-16)
[^2]: Meross Smart Sprinkler Timer Kit, MST100HHK - Meross Official Store. https://shop.meross.com/products/smart-sprinkler-timer-eu (manufacturer, checked 2026-10-16)