Connecting Your Mysa Smart Thermostat with Matter
Connecting Your Mysa Smart Thermostat with Matter
Matter is an open smart home connectivity standard that lets you add and control your Mysa thermostat directly from Apple Home, Google Home, Amazon Alexa, or any other smart home platform that supports Matter. Once paired, you can control temperature, change modes, and use voice commands while keeping your settings in sync with the Mysa app.
Matter support is available for the Mysa Smart Thermostat for Central HVAC. Mysa Baseboard, AC, and In-Floor thermostats do not support Matter; those products continue to support Apple Home, Google Home, and Amazon Alexa through their existing integrations.
Before you start
What you need
- Mysa Smart Thermostat for Central HVAC with firmware 4.5.29 or later
- Mysa app (iOS or Android) v4.11 or later, signed in to your account
- Apple Home (iPhone or iPad with iOS 16.2 or later), Google Home (with a Google Nest Hub or compatible device), Amazon Alexa (Echo 4th gen or later or another Matter-compatible controller), or another Matter-supported platform
- Your thermostat online and connected in the Mysa app before pairing
How to pair your Mysa thermostat via Matter
Getting your Matter pairing code
- Open the Mysa app and tap the menu icon (top left).
- Under Other, tap Home Assistants.
- When prompted, tap Mysa for Central HVAC.
- Select the device you want to connect.
- On the Connect using Matter screen, use the QR code or tap the Pairing Code field to copy the code.
- In your home platform app, scan the QR code or paste the pairing code (you can use a second phone for the QR code if needed).
What you can do with Matter
Supported controls
| Feature / capability | Available via Matter |
|---|---|
| --- | --- |
| View current temperature | Yes |
| View and change setpoint | Yes |
| Change mode (Heat / Cool / Auto / Off / AUX Heat / Fan) | Yes |
| Auto mode dual heat + cool setpoints | Yes |
| View humidity reading | Yes (platform display varies) |
| Voice control (mode and setpoint) | Yes |
| Scenes / routines / automations | Yes |
Temperature range differences
The Mysa app and Matter-connected platforms use slightly different supported temperature ranges. This is a Matter standard limitation, not a Mysa-specific issue.
| Platform | Supported range |
|---|---|
| --- | --- |
| Mysa app — Heat setpoint | 5°C – 30°C |
| Mysa app — Cool setpoint | 16°C – 37°C |
| Matter platforms (Apple Home, Google Home, Alexa) — Heat setpoint | 7°C – 30°C |
| Matter platforms — Cool setpoint | 16°C – 30°C |
| Matter platforms — Dual heat/cool setpoints in Auto mode | 7°C – 30°C (minus deadband limits) |
Example: with the default 2°C deadband, you can set the heat setpoint between 7°C – 28°C and the cool setpoint between 18°C – 30°C in Auto mode on Matter platforms.
If you set a temperature below 7°C or above 30°C in the Mysa app, the value is reflected on the Matter platform as-is. If you then adjust the setpoint from the Matter platform, you may only be able to choose values within the 7–30°C range; values outside that range may show an error or revert.
Auto mode and deadband
Auto mode lets your thermostat switch between heating and cooling based on your setpoints. In the Mysa app, enable Auto mode in settings before it is available, then set heat and cool targets and a deadband between 2°C and 6°C (default 2°C).
- You can enable Auto mode directly from a Matter platform without enabling it in the Mysa app first. When enabled via Matter, a default 2°C deadband applies; deadband control is not yet available in home assistant apps.
- Auto mode requires both a heat and a cool setpoint. Matter enforces a minimum gap (deadband) between them. Change the deadband only in the Mysa app; Matter platforms honor the deadband set there.
Known limitations
These limitations come from the Matter standard and individual platforms (Apple Home, Google Home, Alexa), not from a defect in your thermostat.
Device name cannot be unique per device
On Apple Home, Matter-certified thermostats may appear as Mysa Smart Thermostat rather than a custom device name. Rename the device in Apple Home after pairing. Google Home may label devices Mysa Smart Thermostat or Matter Device; rename and assign rooms after pairing.
Humidity sensor appears as a separate device
On Google Home, humidity may appear as a separate tile from the thermostat tile (required for Matter certification). Both tiles can be renamed after pairing. Removing the thermostat from Google Home also removes the humidity tile. On Apple Home, temperature and humidity appear in one accessory. Humidity is not available in Amazon Alexa.
Invalid modes may still appear
Depending on your HVAC configuration (for example, heat-only), modes such as Cool or Auto may still appear in your Matter app even when unsupported. Selecting an unsupported mode is rejected by the thermostat; it stays in the last valid mode.
Aux heat and fan mode display
When the thermostat runs auxiliary heat, Apple Home may show Off while Google Home and Alexa show Heat. This is a display difference only. In fan-only mode, Apple Home and Alexa may show Off while the fan continues to run.
Settings sync and refresh
Mysa app settings take priority over Matter platform settings. Changes sync in both directions. Google Home tiles may lag; close and reopen the device tile to refresh.
Re-pairing after device reset
If you re-pair the thermostat in the Mysa app, Matter integrations disconnect. Remove the device from your Matter platform, then pair again with a new pairing code from the Mysa app. Delete the device from the Matter app before re-pairing in Mysa for a clean connection.
Device offline behavior
When the thermostat loses Wi-Fi, Google Home and Alexa may mark it unresponsive before the Mysa app shows offline. Apple Home may show it as available for a few minutes longer. This is normal platform behavior.
Legacy Mysa products and Matter
Mysa Baseboard, AC, and In-Floor thermostats do not support Matter. Apple Home, Google Home, and Amazon Alexa integrations remain fully supported for those products through their standard connection flows.