IKEA releases Thread 1.4 firmware for TIMMERFLOTTE and KLIPPBOK

IKEA released new firmware for two of its Matter-over-Thread sensors on November 11, 2026. The TIMMERFLOTTE temperature and humidity sensor moves to version 1.2.2, and the KLIPPBOK water leak sensor moves to 1.1.1. IKEA added both versions that day to the CSA's production Distributed Compliance Ledger, the database Matter controllers check for firmware updates (TIMMERFLOTTE record, KLIPPBOK record). The KLIPPBOK release notes list four changes: Matter 1.5, Thread 1.4, improved device stability and a new serial-number attribute. The TIMMERFLOTTE 1.2.2 notes list the same four. This article first ran on September 26, when 1.2.2 was available only on IKEA's test network.

IKEA's production release-notes page for TIMMERFLOTTE still listed only 1.0.21 on November 13, so the ledger is the place to confirm that 1.2.2 is out. The production entry points to the same build IKEA posted for testing on September 22, with the same version number and file identifier. On November 13 the ledger also had no certification record for either new version, while the versions they replace are certified (TIMMERFLOTTE 1.0.21 record). Some controllers deliver only certified firmware from the ledger, so that gap may decide which ones offer the update first.

IKEA lists no new readings or controls. It doesn't say which stability problem the updates address, or whether battery life or measurement behavior changes. Thread 1.4's headline feature, letting border routers from different brands share one network, runs in the border routers, so updating a sensor leaves your network setup as it is. Owners whose sensors drop off the Thread network have the clearest reason to want the update, but IKEA's broad "stability" note isn't proof that a specific dropout is fixed.

How each controller delivers it

The sensor takes the update from the system it is paired with:

• DIRIGERA: IKEA says its hub and the smart products connected to it stay updated automatically. It hasn't said when this version reaches DIRIGERA homes.
• Home Assistant: the Matter integration shows an update entity and checks the ledger every 12 hours, and the homeassistant.update_entity action forces an earlier check. Its Matter server doesn't check the ledger's certification records before offering an update, so it can offer these versions now.
• Apple Home: Apple's Matter update guide makes the home hub the update source. For a Thread sensor, that means an Apple TV or HomePod with Thread, which reads the production ledger. The same guide says that ledger is for certified firmware and that uncertified updates must use the test ledger. Once the hub offers an update, it installs it itself if automatic updates for other accessories are on in the Home app's software update settings; otherwise you tap Update.
• SmartThings: hubs install CSA-certified ledger updates once you allow device firmware updates in the hub settings. The 2023 post announcing this still names only three Eve products, but a December 2025 reply in the same thread quotes an owner whose SmartThings hub updated a new TIMMERFLOTTE to IKEA's certified firmware of the time during setup, so the list looks out of date.
• Google Home: Google says its Matter hubs can deliver updates from the ledger and that a device must be CSA-certified to receive them, without saying whether that applies to each firmware version. A maker registered in Google's developer console can also choose its own update source.

Until the CSA records certification for 1.2.2 and 1.1.1, Apple Home and SmartThings may hold the update, and Google Home might. Matterhome hasn't confirmed that Apple Home, Google Home, SmartThings or Alexa offers the IKEA versions yet.

Home Assistant with an Apple border router

Home Assistant currently can't update a Matter-over-Thread device on a Thread network that includes any Apple border router, such as a HomePod mini or Apple TV 4K. The update fails with the error "Target node did not process the update file". If you run Apple and non-Apple border routers side by side, Home Assistant's troubleshooting steps are to power down the Apple border routers, wait at least 30 minutes and try again. With Apple border routers only, Home Assistant suggests adding another border router, such as its own; that makes a mixed network, so the power-down steps still apply. If the sensor is also paired with Apple Home, Home Assistant points to Apple Home as the other update route, subject to the certification question above.

If you installed the 1.2.2 test build through the Matter Server app's `enable_test_net_dcl` option, your sensors already run the production build. Turn the option off unless you want IKEA's and other makers' test firmware offered as well.

Update one sensor first

You don't need to reset, remove or re-pair a working sensor to get the update. Install it when your controller offers it. Where the controller lets you choose, update one sensor first and watch it for a few days before the rest. Check that temperature and humidity readings still arrive and that automations still run. For KLIPPBOK, wet the contacts after updating and confirm that the buzzer sounds and that any phone alert you set up still arrives.