# Meross MTS155 Thread Smart Thermostat Valve (EU)

*Meross / MTS155, MTS155MAT, MTS155MATTRI*

> The Meross MTS155 Thread Smart Thermostat Valve is a radiator valve that connects over Matter over Thread, so it needs a Thread border router such as a HomePod mini or Nest Hub. It runs on two AA batteries, fits M30 x 1.5 mm valves and needs no Meross hub. It suits HomeKit, Google Home, Alexa and Home Assistant users, with native support through Matter over Thread.

- Canonical page: https://smarthomecanon.com/devices/meross-mts155
- Last checked: 2026-10-20

## Key facts

| Fact | Value |
| --- | --- |
| Brand | [Meross](https://smarthomecanon.com/brands/meross) |
| Category | Thermostat |
| Model numbers | MTS155, MTS155MAT, MTS155MATTRI |
| Status | Current[^1] |
| Type | Radiator valve[^1] |
| Heating system | Radiator valves, M30 x 1.5 mm[^1] |
| Standard | Matter over Thread[^1] |
| HomeKit | Via Matter[^1] |
| Sold in | EU[^1] |

## Integration paths

**How the Meross MTS155 Thread Smart Thermostat Valve (EU) connects**

| Path | Requires | Local | Features lost |
| --- | --- | --- | --- |
| [Matter / Thread](https://smarthomecanon.com/protocols/matter-thread) | A Matter controller, A Thread border router[^1] | unknown | unknown |

**Platform support for the Meross MTS155 Thread Smart Thermostat Valve (EU)**

| Path | Platform | Support | Integration |
| --- | --- | --- | --- |
| Matter / Thread | [HomeKit](https://smarthomecanon.com/platforms/homekit) | Native[^1] |  |
| Matter / Thread | [Amazon Alexa](https://smarthomecanon.com/platforms/alexa) | Native[^1] |  |
| Matter / Thread | [Google Home](https://smarthomecanon.com/platforms/google-home) | Native[^1] |  |
| Matter / Thread | [Home Assistant](https://smarthomecanon.com/platforms/home-assistant) | withheld |  |
| Matter / Thread | [Homey](https://smarthomecanon.com/platforms/homey) | withheld |  |

## Related pages

- [Meross thermostats and radiator valve](https://smarthomecanon.com/lines/meross-thermostats-and-valves) (line)
- [Meross](https://smarthomecanon.com/brands/meross) (brand)
- [Matter over Thread](https://smarthomecanon.com/protocols/matter-thread) (protocol)
- [HomeKit](https://smarthomecanon.com/platforms/homekit) (platform)
- [Amazon Alexa](https://smarthomecanon.com/platforms/alexa) (platform)
- [Google Home](https://smarthomecanon.com/platforms/google-home) (platform)
- [Home Assistant](https://smarthomecanon.com/platforms/home-assistant) (platform)
- [Homey](https://smarthomecanon.com/platforms/homey) (platform)

## Sources

[^1]: Meross Thread Smart Thermostat Valve, MTS155 - Meross Official Store. https://shop.meross.com/products/thread-thermostat-mts155 (manufacturer, checked 2026-10-16)