serin labsChoose firmware for your smart-home app or Serin Link. All three builds are free to install and need no Serin Labs account or subscription.
On this page
For Serin Link without an app, choose HomeKit-compatible firmware (Apple Home in the flash tool) and follow Serin Link setup. No Apple device or home hub is needed.
Choose by the app you use
Using more than one app?
- Home Assistant plus another app: choose Home Assistant. It can share the thermostat with Apple Home through its HomeKit Bridge integration, and with Google Home or Alexa through Home Assistant.
- The Matter-compatible build in Apple Home or Home Assistant: it can be added to either app through Matter.
How the builds differ
All three use 2.4 GHz Wi-Fi. Compare board support and sensor routes in Features and supported hardware.
Home Assistant
Join Wi-Fi, adopt the controller in ESPHome, then add the Home Assistant integration. Customize with the YAML generator. Open source.
Apple Home
Join Wi-Fi, then scan the pairing code with the Home app. Extra controls and updates are in the web interface. Open source; not Apple-certified. Confirm the uncertified-accessory notice when pairing.
Google Home, Alexa & SmartThings
The app sends Wi-Fi details while pairing over Bluetooth. Extra controls and updates are in the web interface. Not certified; source is not published. Your app may ask you to confirm an uncertified accessory.
See controls and entities for app limits and licenses and compliance for source and terms.
Install or switch firmware
Use the flash tool on a computer with Chrome, Edge or Brave and a USB-C data cable. It offers builds for your board, labeled ESPHome, Apple Home, and Google Home, Alexa & SmartThings.
Switching requires a USB reinstall and new app pairing. To update the same firmware, use Update firmware.