nRF Connect SDK v1.7.1 Release Notes

nRF Connect SDK delivers reference software and supporting libraries for developing low-power wireless applications with Nordic Semiconductor products. It includes the TF-M, MCUboot and the Zephyr RTOS open source projects, which are continuously integrated and re-distributed with the SDK.

The nRF Connect SDK is where you begin building low-power wireless applications with Nordic Semiconductor nRF52, nRF53, and nRF91 Series devices. nRF53 Series devices are now supported for production. Wireless protocol stacks and libraries may indicate support for development or support for production for different series of devices based on verification and certification status. See the release notes and documentation for those protocols and libraries for further information.


This minor release adds the following fixes on top of nRF Connect SDK v1.7.0:

Release tag

The release tag for the nRF Connect SDK manifest repository ( is v1.7.1. 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 for more information.

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

See known issues for nRF Connect SDK v1.7.1 for the list of issues valid for this release.


The following sections provide detailed lists of changes by component.


The following changes are relevant for the nRF52 and nRF53 Series.

Bluetooth mesh

  • Updated:

    • Fixed an issue where the Scene Server target scene matched the current scene. The transition now completes immediately.

    • Fixed an issue where the Light CTL Temperature Server calculated the time to edge to be longer than expected.


The Zephyr fork in nRF Connect SDK (sdk-zephyr) contains all commits from the upstream Zephyr repository up to and including 14f09a3b00, plus some nRF Connect SDK specific additions. This is the same commit ID as the one used for nRF Connect SDK v1.7.0.

For a complete list of nRF Connect SDK specific commits since v1.7.0, run:

git log --oneline manifest-rev ^v2.6.0-rc1-ncs1