nRF Connect SDK v2.1.4 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.


This minor release adds changes on top of the nRF Connect SDK v2.1.0, nRF Connect SDK v2.1.1, nRF Connect SDK v2.1.2, and nRF Connect SDK v2.1.3. The changes affect Bluetooth® LE stack, Zephyr kernel, and LwM2M carrier library.

See Changelog for the complete list of changes.

Release tag

The release tag for the nRF Connect SDK manifest repository ( is v2.1.4. 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 Examples of commands for more information.

For information on the included repositories and revisions, see Repositories and revisions for v2.1.4.

IDE and tool support

nRF Connect for Visual Studio Code extension is the only officially supported IDE for nRF Connect SDK v2.1.4. SEGGER Embedded Studio Nordic Edition is no longer tested or recommended for new projects.

Installing automatically, 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 v2.1.4 for the list of issues valid for the latest release.


The following sections provide detailed lists of changes by component.


This section provides detailed lists of changes by protocol.

Bluetooth LE

  • Updated MPSL by removing calls to __WFE() for the nRF5340 SoC, to be in line with the Errata for the Anomaly 160.

  • Fixed a rare issue that could cause an assert when requesting timeslots with type MPSL_TIMESLOT_REQ_TYPE_EARLIEST.

For details, see the MPSL changelog.


This section provides detailed lists of changes by library.

Binary libraries


The Zephyr fork in nRF Connect SDK (sdk-zephyr) contains all commits from the upstream Zephyr repository up to and including 71ef669ea4a73495b255f27024bcd5d542bf038c. This is the same commit ID as the one used for nRF Connect SDK v2.1.0, v2.1.1, v2.1.2, and v2.1.3. It also contains some nRF Connect SDK specific additions and commits cherry-picked from the upstream Zephyr repository including the following one:

  • Added workaround in sdk-zephyr for the Anomaly 160 that is affecting the nRF5340 SoC.

For a complete list of nRF Connect SDK specific commits and cherry-picked commits since v2.1.0, run the following command:

git log --oneline manifest-rev ^v3.1.99-ncs1