Connecting Your Mysa Smart Thermostat with Matter
Last updated: July 6, 2026
Product: Mysa Smart Thermostat for Central HVAC | Firmware: 4.5.37 or later | App: Mysa app 4.11 or later
Quick Start — just want to pair? Here's all you need:
Open the Mysa app and tap the menu icon (top left).
Under Other, tap Home Assistants.
Tap Mysa for Central HVAC, then select your device.
Copy the pairing code (or keep the QR code visible).
Open your smart home app (Apple Home, Google Home, or Alexa) and add a new device using that code.
Note: Matter support is available for the Mysa Smart Thermostat for Central HVAC only. 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.
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.
Before You Start
General Requirement
Your thermostat, the phone running the Mysa app, and your Matter hub must all be on the same Wi-Fi network for Matter to work correctly. If any of these are on a different network or a guest network, pairing may fail or the thermostat may appear unresponsive in your smart home app.
What You Need
Mysa Smart Thermostat for Central HVAC with firmware 4.5.37 or later
Mysa app (iOS or Android) v4.11 or later, signed in to your account
Your thermostat online and connected in the Mysa app before pairing
A supported smart home platform — see platform-specific requirements below:
Platform | Phone / OS | Hub required |
|---|---|---|
Apple Home | iPhone or iPad — iOS / iPadOS 16.2 or later | HomePod, HomePod mini, or Apple TV 4K. On iOS 18+ you can pair and locally control without a hub, but automations and remote access still require one. iPad is no longer supported as a Home Hub. |
Google Home | Android or iPhone with the Google Home app | Nest Hub (2nd gen), Nest Hub Max, Nest Mini, Nest Wifi Pro, or another Matter-compatible Google device. Check Google compatibility list if unsure. |
Amazon Alexa | iPhone or Android with the Alexa app | Most current Echo speakers, Echo Show displays, and eero routers support Matter. Older Echo (1st/2nd gen) and Echo Dot (3rd gen and earlier) do not. Check Amazon compatibility list if unsure. |
Choose Your Platform
Follow the step-by-step guide for the platform you are pairing to:
Want to use your thermostat from more than one platform at once? See Using Matter with Multiple Smart Home Platforms.
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) | Yes |
Additional modes (AUX Heat / Fan Only) | Not available via Matter but available via Mysa and synced to Matter (platform display varies — see platform sections below) |
Auto mode — dual heat + cool setpoints | Yes |
View humidity reading | Yes (platform display varies — see platform sections below) |
Voice control (mode and setpoint) | Yes |
Scenes / routines / automations | Yes (platform behaviour varies — see Known Limitations in each platform guide) |
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 | Heat setpoint | Cool setpoint |
|---|---|---|
Mysa app | 5°C – 30°C | 16°C – 37°C |
Matter platforms (Apple Home, Google Home, Alexa) | 7°C – 28°C | 16°C – 30°C |
Auto mode via Matter (with default 2°C deadband) | 7°C – 28°C | 16°C – 30°C |
Note: If you set a temperature outside the Matter range in the Mysa app (e.g. cool setpoint above 30°C), the correct Mysa-set value is reflected on the Matter platform. If you then adjust the setpoint from the Matter platform, you may only be able to choose values within the 16–30°C range; values outside that range may show an error or revert. Use the Mysa app if extended range is desired.
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 Mysa settings before using it, then set heat to and cool to 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 available in home assistant apps — change the deadband only in the Mysa app. All Matter platforms honour the deadband set in the Mysa app.
In cool mode, if you try to set the cool setpoint less than the heat setpoint plus the deadband, the platform will reject the change or adjust the other setpoint automatically. This is expected deadband behaviour.
Good to Know (All Platforms)
These limitations come from the Matter standard and individual platform implementations, not from a defect in your thermostat. Platform-specific notes live in each platform guide above.
Setpoint Constraints in Heat/Cool and Auto Mode
In cool mode, if you try to set the cool setpoint to less than the heat setpoint plus the deadband, the platform will either reject the change or automatically adjust the other setpoint. This is expected deadband behaviour. The same constraint applies in auto mode to both setpoints.
Settings Sync
Mysa app settings take priority. Changes sync in both directions between the Mysa app and all paired platforms.
Re-Pairing Disconnects Matter Integrations
If you re-pair the thermostat in the Mysa app, all Matter platform connections are lost. For a fresh re-pair, remove the device from every Matter platform first, then re-pair in the Mysa app, then pair each platform again using a new code. You will need to recreate automations if re-pairing your Mysa.
HVAC Configuration Code Changes Require Re-Pairing
If you change the configuration code on your Mysa thermostat (for example, switching from a heat-only to a heat/cool system if incorrectly set prior to pairing with Matter), remove the thermostat from all Matter platforms and re-pair after making the change. Without re-pairing, your Matter integration may not reflect the new system capabilities correctly — for example, previously hidden or rejected modes may not update, and new modes supported by your updated configuration may not become available. Configuration code changes are rare so this should be a one time setup.
Invalid Modes May Appear on Some Platforms
Depending on your HVAC configuration code, modes such as Cool or Auto may appear in some Matter platforms even when your system does not support them. This is a display issue only. The thermostat rejects commands for unsupported modes and stays in the last valid mode.