nRF Connect SDK v1.6.1 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 v1.6.0:

  • Fixed an issue in SoftDevice Controller that affected scanning on the nRF53 Series (DRGN-15852).

  • Fixed an issue in the HomeKit component, where DFU would fail when using external flash memory for update image storage (KRKNWK-10611).

Release tag

The release tag for the nRF Connect SDK manifest repository ( is v1.6.1. 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 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 v1.6.1 for the list of issues valid for this release.