# Meross MTS300MA Matter Smart Thermostat

*Meross / MTS300MA, MTS300*

> The Meross MTS300MA Matter Smart Thermostat is a Matter thermostat for heating and cooling systems, including furnaces, boilers, air conditioners, heat pumps and fan coil units. It needs a C wire and works with HomeKit, Alexa, Google Assistant and SmartThings. It suits HomeKit, Google Home, Alexa, SmartThings and Home Assistant users, with native support through Matter over Wi-Fi.

- Canonical page: https://smarthomecanon.com/devices/meross-mts300
- Last checked: 2026-10-20

## Key facts

| Fact | Value |
| --- | --- |
| Brand | [Meross](https://smarthomecanon.com/brands/meross) |
| Category | Thermostat |
| Model numbers | MTS300MA, MTS300 |
| Status | Current[^1] |
| Type | Wall thermostat[^1] |
| Heating system | Heating and cooling, C wire required[^1] |
| Standard | Matter over Wi-Fi[^1] |
| HomeKit | Via Matter[^1] |

## Integration paths

**How the Meross MTS300MA Matter Smart Thermostat connects**

| Path | Requires | Local | Features lost |
| --- | --- | --- | --- |
| [Matter / Wi-Fi](https://smarthomecanon.com/protocols/matter-wifi) | A Matter controller, 2.4 GHz Wi-Fi network, C wire[^1] | unknown | unknown |

**Platform support for the Meross MTS300MA Matter Smart Thermostat**

| Path | Platform | Support | Integration |
| --- | --- | --- | --- |
| Matter / Wi-Fi | [HomeKit](https://smarthomecanon.com/platforms/homekit) | Native[^1] |  |
| Matter / Wi-Fi | [Amazon Alexa](https://smarthomecanon.com/platforms/alexa) | Native[^1] |  |
| Matter / Wi-Fi | [Google Home](https://smarthomecanon.com/platforms/google-home) | Native[^1] |  |
| Matter / Wi-Fi | [Samsung SmartThings](https://smarthomecanon.com/platforms/smartthings) | Native[^1] |  |
| Matter / Wi-Fi | [Home Assistant](https://smarthomecanon.com/platforms/home-assistant) | withheld |  |
| Matter / Wi-Fi | [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 Wi-Fi](https://smarthomecanon.com/protocols/matter-wifi) (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)
- [Samsung SmartThings](https://smarthomecanon.com/platforms/smartthings) (platform)
- [Home Assistant](https://smarthomecanon.com/platforms/home-assistant) (platform)
- [Homey](https://smarthomecanon.com/platforms/homey) (platform)

## Sources

[^1]: Meross Matter Smart Thermostat for Cooling and Heating System, MTS300MA - Meross Official Store. https://shop.meross.com/products/matter-smart-thermostat-mts300ma (manufacturer, checked 2026-10-16)