nRF Connect SDK v3.3.1 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, nRF54, 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 patch release adds the following changes on top of the nRF Connect SDK v3.3.0. The changes affect the nRF54L Series, Bluetooth®, and the Peripheral samples.

Added the following features as supported:

• Bluetooth:

  • Support for Bluetooth Core version 6.3.

  • Support for Channel Sounding Inline Phase Correction Term (CS IPT). This feature allows a CS Initiator to calculate distance without exchanging tone data over the ACL, resulting in faster and more power-efficient distance estimation.

• Fixed an issue where USB battery charging detection operated correctly only during the first cable connection after an SoC reset.

Release tag

The release tag for the nRF Connect SDK manifest repository (https://github.com/nrfconnect/sdk-nrf) is v3.3.1. 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 Install the nRF Connect SDK code and toolchain and Updating the repositories for more information.

For information on the included repositories and revisions, see Repositories and revisions for v3.3.1.

IDE and tool support

nRF Connect extension for Visual Studio Code is the recommended IDE for nRF Connect SDK v3.3.1. See the Installation section for more information about supported operating systems and toolchain.

Supported modem firmware

See the following documentation for an overview of which modem firmware versions have been tested with this version of the nRF Connect SDK:

• Modem firmware compatibility matrix for the nRF9151 SoC

• Modem firmware compatibility matrix for the nRF9160 SoC

Use the latest version of the Programmer app of nRF Connect for Desktop to update the modem firmware. See Programming nRF91 Series DK firmware for instructions.

Modem-related libraries and versions

Modem-related libraries and versions

Library name	Version information
Modem library	Changelog
LwM2M carrier library	Changelog

Known issues

Known issues are only tracked for the latest official release. See known issues for nRF Connect SDK v3.3.1 for the list of issues valid for the latest release.

Changelog

The following sections provide detailed lists of changes by component.

Developing with nRF54L Series

• Updated builds without Partition Manager to generate the bootconf.hex file when nRF Secure Immutable Bootloader is used as the bootloader.

Samples

This section provides detailed lists of changes by sample.

Bluetooth samples

• Added the Bluetooth: Channel Sounding Initiator with Inline PCT Transfer and Bluetooth: Channel Sounding Reflector with Inline PCT Transfer samples to demonstrate how to use the Bluetooth Channel Sounding (CS) Inline Phase Correction Term Transfer (IPT) feature.

Peripheral samples

• Radio test (short-range) sample:

  • Added the set_channel_sequence_hopping_mode shell command to set the hopping mode for the channel sequence.

Zephyr

The Zephyr fork in nRF Connect SDK (sdk-zephyr) contains all commits from the upstream Zephyr repository up to and including 93b5f19f994b9a9376985299c1427a1630f6950e.

For a complete list of nRF Connect SDK specific commits and cherry-picked commits since v3.3.0, run the following command:

git log --oneline manifest-rev ^ncs-v3.3.0