Firmware updates and release notes
Faikin Australia
How to update the firmware on your Faikin module, and what has changed in each release.
If you arrived here from the firmware update notice in Home Assistant, you are in the right place. Home Assistant links to this page as the release notes for Sora, Ninja, Oyu and Faiktron modules.
On this page
Update a Sora, Ninja, Oyu or Faiktron module
These modules do not update themselves. They check for new firmware every few days and tell you when one is available, but you start the update.
- On a phone or computer connected to the same network as the module, open the module's web page. Browse to
faikinac-xxxx.local, where xxxx is the last four characters of the module's MAC address, or browse to the module's IP address from your router's device list. - Open the Firmware Upgrade menu and start the upgrade. The module needs internet access to download the new firmware.
- Wait a minute or two. The module downloads the firmware, restarts and comes back on its own. Do not turn the air conditioner off at the isolator while this is happening.
- Check the version shown on the web page. If you were on a much older version and it has not changed, run the upgrade a second time.
From version 3.9.2, an update can no longer leave the module unusable. If new firmware fails to start, or the module restarts within about 30 seconds of an update, it goes back to the previous firmware by itself. If it crashes repeatedly it starts in Safe mode, where the web page still works so you can run the upgrade again.
If the upgrade stops with an OTA failed message, the module ran short of memory while downloading the new firmware. A weak WiFi signal makes this more likely. Turn on Safe mode in the module's web UI, run the upgrade again, then turn Safe mode off.
If you are on a version older than 3.9.2 and the upgrade will not complete, contact us and we will help you get it across.
The Home Assistant update notice
Only Sora, Ninja, Oyu and Faiktron modules show this notice. Faikout modules do not.
If one of these modules is connected to Home Assistant over MQTT, it appears with a Firmware update entity. When new firmware is available, Home Assistant shows an update notice:
- Install sends the same upgrade command as the module's web UI. If nothing happens, use the module's web UI as described above.
- The release notes link opens this page.
On test builds, Home Assistant can show a latest version lower than the installed version. That is expected. Don't upgrade firmware on test builds unless instructed to do so!
Update a Faikout module
Faikout modules run RevK's open-source firmware, which works differently from the modules above.
- Faikout firmware updates itself automatically, about once a week, when a new release is available. You can change this in the module's settings.
- To update straight away, open the module's web page, go to WiFi settings and click Upgrade. The module needs internet access, and it restarts on its own when the update finishes.
- Fixes are often released to beta first. The firmware update section of the module's web page has a switch between release and beta builds. Switch to beta to pick up a fix early, and back to release once it has been released.
The firmware source code, manuals and issue tracker are on Codeberg: codeberg.org/RevK/ESP32-Faikout. Changes in progress are listed on the Work in progress page. Our setup guide is here.
Launch dates
| Date | Module | Air conditioner brands |
|---|---|---|
| 15 October 2026 | Sora | Daikin (S21 connector), LG, Mitsubishi Electric and Mitsubishi Heavy Industries, each in WiFi and Matter builds |
| 9 October 2026 | Faiktron | ActronAir ducted systems with an LM7, LM8 or LM24 series wall controller |
| 19 September 2026 | Oyu | Daikin Altherma 4 (testing) |
| 5 August 2026 | Ninja | Mitsubishi Heavy Industries (X-Y) |
| 2 August 2026 | Oyu | Daikin Altherma 2 and 3 |
| 8 July 2026 | Ninja | Daikin ducted, VRV and Sky Air (P1/P2) |
Release notes: Sora, Ninja, Oyu and Faiktron
Newest first. Version numbers are shown as the module reports them. A longer version such as 3.9.4.2-6-g1a2b3c4 is a build after 3.9.4.2 and includes everything listed up to that point.
3.9.4.3
28 October 2026 · Sora (LG)
- Matter build updated to Matter 1.6.1.
- Underlying platform updated, with low-level WiFi reliability fixes.
3.9.4
25 October 2026 · All modules
- Zone control fixes for Daikin ducted systems (Ninja).
October fixes (3.9.3 builds)
17 to 24 October 2026
- Sora (Mitsubishi Heavy Industries): fixes a fault reading the air conditioner on some early modules. Released for both the WiFi and Matter builds.
- Ninja: zone fan speed can now be set correctly on Daikin zoned systems.
- All modules: if the module restarts within about 30 seconds of an update, it now goes back to the previous firmware automatically.
- All modules: on-board schedules. Set times and settings in the web page under Setup, then Schedule. They run on the module, without Home Assistant or an internet connection.
Sora (LG) fix
9 October 2026 · Sora (LG)
- Fixes the air conditioner ignoring thermostat changes in some cases.
3.9.2
2 October 2026 · All modules
- New web interface.
- Safer updates: if new firmware fails to start, the module returns to the previous version.
- Safe mode: after five crashes in a row the module starts in a minimal mode so you can still reach the web page and update.
- Checks for new firmware every three days and reports it to Home Assistant.
Sora (LG) fix
22 September 2026 · Sora (LG)
- Status LED now shows the correct state.
3.9.0
12 September 2026 · All modules
- MQTT topics changed, and module settings can now be changed with MQTT commands. If you use your own MQTT automations rather than Home Assistant discovery, check them after updating.
3.8.4
22 to 27 July 2026 · All modules
- Replaces the earlier 3.8 builds and fixes problems found in them.
- Matter build: the status LED now behaves the same as on the WiFi build.
3.8.3
16 to 19 July 2026
- Ninja: zone control bug fix.
- Matter build updated.
3.8.0
10 July 2026
- Ninja: zone control for Daikin ducted systems, with zones detected automatically.
- Apple HomeKit and Matter support.
Release notes: Faikout
Faikout firmware changes often. For the full and current list, see the Work in progress page on Codeberg. Recent fixes worth knowing about:
- A memory issue that could make some modules restart after running for a long time is fixed in the current beta.
- Home Assistant showing the air conditioner as unavailable for short periods is fixed in the current beta.
- On-board schedules are available under Setup, then Schedule.
