nRF Connect SDK v1.3.2 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.

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 (which are pre-production) and Thread, Zigbee, and Bluetooth Mesh protocols are supported for development in v1.3.2 for prototyping and evaluation. Support for production and deployment in end products is coming soon.


  • Zephyr Bluetooth LE Controller is now Bluetooth Core Specification v5.1 qualified.

Release tag

The release tag for the nRF Connect SDK manifest repository ( is v1.3.2. 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

This version of the nRF Connect SDK has been tested with the following modem firmware for cellular IoT applications:

  • mfw_nrf9160_1.2.1

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.


The following sections provide detailed lists of changes by component.


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

  • Zephyr Bluetooth LE Controller (see Bluetooth Stack Architecture):

    • Fixed invalid disconnect reason in the disconnect complete event.

    • Changed the controller HCI version to Bluetooth Core Specification v5.1.