nRF Connect SDK v2.4.1 Release Notes

nRF Connect SDK delivers reference software and supporting libraries for developing low-power wireless applications with Nordic Semiconductor products in the nRF52, nRF53, nRF70, and nRF91 Series. The SDK includes open source projects (TF-M, MCUboot, OpenThread, Matter, and the Zephyr RTOS), which are continuously integrated and redistributed with the SDK.

Release notes might refer to “experimental” support for features, which indicates that the feature is incomplete in functionality or verification, and can be expected to change in future releases. To learn more, see Software maturity levels.

Highlights

This minor release adds changes on top of the nRF Connect SDK v2.4.0. The changes affect Matter, Thread, 802.15.4 radio driver, and Apple Find My.

See Changelog for the complete list of changes.

Release tag

The release tag for the nRF Connect SDK manifest repository (https://github.com/nrfconnect/sdk-nrf) is v2.4.1. Check the west.yml file for the corresponding tags in the project repositories.

To use this release, check out the tag in the manifest repository and run west update. See Get the nRF Connect SDK code and Updating the repositories for more information.

For information on the included repositories and revisions, see Repositories and revisions for v2.4.1.

IDE and tool support

nRF Connect for Visual Studio Code extension is the only officially supported IDE for nRF Connect SDK v2.4.1. SEGGER Embedded Studio Nordic Edition is no longer tested or recommended for new projects.

Installation with Toolchain Manager, used to install the nRF Connect SDK automatically from nRF Connect for Desktop, is available for Windows, Linux, and macOS.

Supported modem firmware

See Modem firmware compatibility matrix for an overview of which modem firmware versions have been tested with this version of the nRF Connect SDK.

Use the latest version of the nRF Programmer app of nRF Connect for Desktop to update the modem firmware. See Updating the modem firmware for instructions.

Known issues

Known issues are only tracked for the latest official release. See known issues for nRF Connect SDK v2.4.1 for the list of issues valid for the latest release.

Changelog

The following sections provide detailed lists of changes by component.

Protocols

This section provides detailed lists of changes by protocol.

Matter

See Matter samples for the list of changes for the Matter samples.

Matter fork

The Matter fork in the nRF Connect SDK (sdk-connectedhomeip) contains all commits from the upstream Matter repository up to, and including, the v1.1.0.1 tag.

The following list summarizes the most important changes inherited from the upstream Matter:

  • Added the CHIP_MALLOC_SYS_HEAP_WATERMARKS_SUPPORT Kconfig option to manage watermark support.

  • Updated the factory data guide with an additional rotating ID information.

  • Fixed an IPC crash on nRF5340 when Zephyr’s main thread takes a long time.

  • Fixed RAM and ROM reports.

Thread

nRF IEEE 802.15.4 radio driver

  • Added a workaround for known issue KRKNWK-16976 allowing to detect crashes of the nRF5340 network core running the 802.15.4 stack.

Apple Find My

  • Fixed two issues in the Apple Find My add-on for the nRF Connect SDK. See the detailed description in the Find My release notes.

Samples

Matter samples

  • Matter: Door lock sample:

    • Fixed the feature map for software diagnostic cluster. Previously, it was set incorrectly.

    • Fixed the cluster revision for basic information cluster. Previously, it was set incorrectly.

Zephyr

The Zephyr fork in nRF Connect SDK (sdk-zephyr) contains all commits from the upstream Zephyr repository up to and including 4bbd91a9083a588002d4397577863e0c54ba7038. It also contains some nRF Connect SDK specific additions and commits cherry-picked from the upstream Zephyr repository including the following ones:

  • Adjusted WEST_PYTHON to posix path to be consistent with other Python scripts that pass paths to the Zephyr CMake build system.

  • Added a workaround against nRF5340 network core crashes which occurred after waking up from sleep state on WFI/WFE instructions.

  • Fixed building with picolib enabled on Windows.

For a complete list of nRF Connect SDK specific commits and cherry-picked commits since v2.4.0, run the following command:

git log --oneline manifest-rev ^v3.3.99-ncs1