nRF Connect SDK v1.2.1 Release Notes

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

nRF Connect SDK v1.2.1 supports product development with the nRF9160 Cellular IoT device. It contains reference applications, sample source code, and libraries for developing low-power wireless applications with nRF52 and nRF53 Series devices, though support for these devices is incomplete and not recommended for production.

Note

Before this release, the nRF Connect SDK moved to a new GitHub organization, nrfconnect. All repositories were renamed to provide clear and concise names that better reflect the composition of the codebase. If you are a new nRF Connect SDK user, there are no actions you need to take. If you used previous releases of the nRF Connect SDK, you should point your repositories to the right remotes.

Highlights

  • Updates to LwM2M carrier library

  • Updates to BSD library

Release tag

The release tag for the nRF Connect SDK manifest repository (https://github.com/nrfconnect/sdk-nrf) is v1.2.1. 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 Getting the nRF Connect SDK code for more information.

Supported modem firmware

This version of the nRF Connect SDK supports the following modem firmware for cellular IoT applications:

  • mfw_nrf9160_1.1.2

Use the nRF Programmer app of nRF Connect for Desktop to update the modem firmware. See Updating the nRF9160 DK cellular modem for instructions.

Tested boards

The following boards have been used during testing of this release:

  • PCA10090 (nRF9160 DK)

  • PCA20035 (Thingy:91)

  • PCA10095 (nRF5340 PDK)

  • PCA10056 (nRF52840 DK)

  • PCA10059 (nRF52840 Dongle)

  • PCA10040 (nRF52 DK)

For the full list of supported devices and boards, see Supported Boards in the Zephyr documentation.

Required tools

In addition to the tools mentioned in Installing the nRF Connect SDK manually, the following tool versions are required to work with the nRF Connect SDK:

Tool

Version

Download link

SEGGER J-Link

V6.60e

J-Link Software and Documentation Pack

nRF Command Line Tools

v10.6.0

nRF Command Line Tools

nRF Connect for Desktop

v3.3.0 or later

nRF Connect for Desktop

dtc (Linux only)

v1.4.6 or later

Installing the required tools

GCC

See Installing the toolchain

GNU Arm Embedded Toolchain

As IDE, we recommend to use SEGGER Embedded Studio (Nordic Edition) version 4.52. It is available from the following links:

Changelog

The following sections provide detailed lists of changes by component.

nRF9160