Changelog for nRF Connect SDK v3.3.0-preview2

This changelog reflects the most relevant changes from the latest official release.

Known issues 

Known issues are only tracked for the latest official release. See known issues for nRF Connect SDK v3.2.0 for the list of issues valid for the latest release.

Changelog 

The following sections provide detailed lists of changes by component.

IDE, OS, and tool support 

Updated the nRF Util device command version to v2.17.2 and required SEGGER J-Link version to v9.18.

Board support 

No changes since the latest nRF Connect SDK release.

Build and configuration system 

No changes since the latest nRF Connect SDK release.

Bootloaders and DFU 

Updated the MCUboot SMP Server sample to move to samples/dfu/smp_svr. Added documentation for the sample.

Developing with nRF91 Series 

No changes since the latest nRF Connect SDK release.

Developing with nRF70 Series 

No changes since the latest nRF Connect SDK release.

Developing with nRF54L Series 

Added:
- Experimental support for nRF54LS05B.
- Experimental support for nRF54LM20B.

Developing with nRF54H Series 

Added:
- A document describing the merged slot update strategy for nRF54H20 devices, allowing simultaneous updates of both application cores (APP and RAD) in a single update operation. For more information, see Configuring nRF54H20 applications for updates using a merged slot.
- A document describing the manifest-based update strategy for nRF54H20 devices. For more information, see Configuring nRF54H20 applications for updates using a manifest.
- The Configuring bootloader requests on the nRF54H20 SoC page describes bootloader requests for the nRF54H20 SoC. It explains how you can pass information from the application to the bootloader.

Developing with nRF53 Series 

No changes since the latest nRF Connect SDK release.

Developing with nRF52 Series 

No changes since the latest nRF Connect SDK release.

Developing with Thingy:91 X 

No changes since the latest nRF Connect SDK release.

Developing with Thingy:91 

No changes since the latest nRF Connect SDK release.

Developing with Thingy:53 

No changes since the latest nRF Connect SDK release.

Developing with PMICs 

No changes since the latest nRF Connect SDK release.

Developing with Front-End Modules 

No changes since the latest nRF Connect SDK release.

Developing with custom boards 

No changes since the latest nRF Connect SDK release.

Security 

Added:
- Support for the WPA3-SAE and WPA3-SAE-PT in the CRACEN driver.
- Support for the HMAC KDF algorithm in the CRACEN driver. The algorithm implementation is conformant to the NIST SP 800-108 Rev. 1 recommendation.
- Support for the secp384r1 key storage in the Key Management Unit (KMU).
- Support for AES-GCM AEAD using CRACEN for the nrf54lm20dk board.
- Support for ChaCha20-Poly1305 AEAD using CRACEN for the nrf54lm20dk board.
- Support for AES Key Wrap (AES-KW) and AES Key Wrap with Padding (AES-KWP) algorithms in the nrf_oberon and CRACEN drivers. The Supported cryptographic operations in the nRF Connect SDK page has been updated accordingly.
Updated:
- The API documentation section for the cryptographic drivers with links to the added API documentation for the CRACEN driver.
- The Oberon PSA Crypto to version 1.5.4 that introduces support for the following new features with the Oberon PSA driver:
  - Support for PSA Certified Crypto API v1.4, PSA Crypto API v1.4 PQC Extension and PSA Crypto Driver Interface v1.0 alpha 1.
  - Experimental support for Extendable-Output Function (XOF) algorithms SHAKE128, SHAKE256, ASCON XOF128 and ASCON CXOF128.
  - Experimental support for hash ML-DSA and deterministic ML-DSA asymmetric signature algorithms.
  - Experimental support for ASCON HASH256 hash algorithm.
  - Experimental support for ASCON AEAD128 AEAD algorithm.
  - Updated implementations of WPA3-SAE, ML-DSA and ML-KEM to support the PSA Crypto API v1.4.
  The Supported cryptographic operations in the nRF Connect SDK page has been updated accordingly.
- The Supported cryptographic operations in the nRF Connect SDK page with information about support for the Curve448 (X448) elliptic curve under Asymmetric signature algorithms and ECC curve types.
- The CONFIG_PSA_WANT_RSA_KEY_SIZE_2048 Kconfig option is now enabled by default whenever CONFIG_PSA_WANT_KEY_TYPE_RSA_KEY_PAIR_BASIC or CONFIG_PSA_WANT_KEY_TYPE_RSA_PUBLIC_KEY is enabled and no other RSA key size is enabled.
Removed:
- The CONFIG_PSA_WANT_KEY_TYPE_WPA3_SAE_PT Kconfig option and replaced it with CONFIG_PSA_WANT_KEY_TYPE_WPA3_SAE.
- The CONFIG_PSA_WANT_ALG_WPA3_SAE Kconfig option and replaced it by options CONFIG_PSA_WANT_ALG_WPA3_SAE_FIXED and CONFIG_PSA_WANT_ALG_WPA3_SAE_GDH.

Trusted Firmware-M (TF-M)

Updated to version 2.2.2.
The default TF-M profile is now CONFIG_TFM_PROFILE_TYPE_NOT_SET for all configurations except for Thingy:91 and Thingy:91 X, on which it is still CONFIG_TFM_PROFILE_TYPE_MINIMAL.

Protocols 

This section provides detailed lists of changes by protocol. See Samples for lists of changes for the protocol-related samples.

Bluetooth® LE

Updated the Direct Test Mode HCI commands by making them optional through the CONFIG_BT_CTLR_DTM_HCI Kconfig option.

Bluetooth Mesh

No changes since the latest nRF Connect SDK release.

DECT NR+

Added DECT NR+ full stack support, including the following features:
- Connection Manager integration for enabling easy connect for the applications.
- Network management API for controlling DECT NR+ operations.
- L2 API implementation enabling IPv6 connectivity, including HAL definition.
- Enabling Internet connectivity through sink and BR (Border Router) support together with, for example, Serial Modem on a gateway nRF91 LTE device.
- nRF91x1 DECT modem driver implementing HAL API and interfacing with DECT NR+ modem firmware where the DECT NR+ MAC layer is running.

Enhanced ShockBurst (ESB)

Added experimental support for concurrent operation of ESB with other radio protocols using the Timeslot feature.
Fixed invalid radio configuration for legacy ESB protocol.

Gazell

No changes since the latest nRF Connect SDK release.

Matter

Updated the Default test event triggers section with the new Closure Control cluster test event triggers.
Deprecated the secure persistent storage backend enabled with the CONFIG_NCS_SAMPLE_MATTER_SECURE_STORAGE_BACKEND Kconfig option.

Matter fork

No changes since the latest nRF Connect SDK release.

nRF IEEE 802.15.4 radio driver

No changes since the latest nRF Connect SDK release.

Thread

Added:
- A warning when using precompiled OpenThread libraries with modified Kconfig options related to the OpenThread stack.
- The otperf tool that is compatible with zperf and iperf for measuring throughput of thread transmissions. For more details, see OpenThread performance measurement.

Wi-Fi®

No changes since the latest nRF Connect SDK release.

Applications 

This section provides detailed lists of changes by application.

Connectivity bridge

No changes since the latest nRF Connect SDK release.

IPC radio firmware

No changes since the latest nRF Connect SDK release.

Matter bridge

Updated partitions mapping for the nRF7002 DK in the application. See the migration guide for more information.

nRF5340 Audio

Added:
- Dynamic configuration of the number of channels for the encoder based on the configured audio locations. The number of channels is set during runtime using the audio_system_encoder_num_ch_set() function. This allows configuring mono or stereo encoding depending on the configured audio locations, potentially saving CPU and memory resources.
- High CPU load callback using the Zephyr CPU load subsystem. The callback uses a printk() function, as the logging subsystem is scheduled out if higher priority threads take all CPU time. This makes debugging high CPU load situations easier in the application. The threshold for high CPU load is set in peripherals.c using CPU_LOAD_HIGH_THRESHOLD_PERCENT.
- CONFIG_SPEED_OPTIMIZATIONS to enable compiler speed optimizations for the application.
Updated:
- Switched to the new USB stack introduced in Zephyr 3.4.0. For an end user, this change requires no action. macOS will now work out of the box, fixing OCT-2154.
- Programming script. Devices are now halted before programming. Furthermore, the devices are kept halted until they are all programmed, and then started together with the headsets starting first. This eases sniffing of advertisement packets.
- With the latest release of nRF Connect for VS Code, you can build and program the nRF Audio application using the nRF Connect for VS Code GUI. Updated the Building and running nRF Audio applications accordingly: the note about missing support in nRF Connect for VS Code has been removed and the section about programming using standard methods now lists the steps for nRF Connect for VS Code and the command line.
- Improved handling of I2S RX buffer overruns. When an overrun occurs, the most recent block in the current frame is removed to make space for new incoming data.
- Optimized USB-to-encoder audio processing pipeline to reduce CPU usage. Note that LC3-encoding of sinusoidal input demands more of the CPU than real-world audio input.
- The audio data path now accumulates 10 ms frames instead of processing 1 ms blocks individually, reducing message queue operations by 90% and improving overall system performance. This optimization affects both USB audio input processing and the I2S audio datapath, resulting in more efficient encoder thread operation.
- Improved error handling with unlikely() macros for better branch prediction in performance-critical paths.
- Separated the audio clock configuration into a dedicated module. This allows for better organization and potential reuse of the audio clock configuration code between different SoCs that might not have the high-frequency audio clock (HFCLKAUDIO) feature. The new module provides an initialization function for setting up the audio clock and a function for configuring the audio clock frequency.
Removed the Bluetooth controller watchdog from the application. The watchdog was not providing value and the removal allows for easier porting to other platforms that do not have a multi-core architecture.

nRF Desktop

Added:
- A workaround for the USB next stack race issue where the application could try to submit HID reports while the USB is being disabled after USB cable has been unplugged, which results in an error. The workaround is applied when the CONFIG_DESKTOP_USB_STACK_NEXT_DISABLE_ON_VBUS_REMOVAL Kconfig option is enabled.
- Support for the nrf54lv10dk/nrf54lv10a/cpuapp board target.
- Application-specific Kconfig options that simplify using SEGGER J-Link RTT (CONFIG_DESKTOP_LOG_RTT) or UART (CONFIG_DESKTOP_LOG_UART) as logging backend used by the application (CONFIG_DESKTOP_LOG). The CONFIG_LOG_BACKEND_UART and CONFIG_LOG_BACKEND_RTT Kconfig options are no longer enabled by default if nRF Desktop logging (CONFIG_DESKTOP_LOG) is enabled. These options are controlled through the newly introduced nRF Desktop application-specific Kconfig options. The application still uses SEGGER J-Link RTT as the default logging backend.
- Support for the nrf54ls05dk/nrf54ls05b/cpuapp board target. The board target can act as either a mouse or a keyboard.
Updated:
- The CONFIG_DESKTOP_BT Kconfig option to no longer select the deprecated CONFIG_BT_SIGNING Kconfig option. The application relies on Bluetooth LE security mode 1 and security level of at least 2 to ensure data confidentiality through encryption.
- The memory map for RAM load configurations of nRF54LM20 target to increase KMU RAM section size to allow for secp384r1 key.
- The default log levels used by the legacy USB stack (CONFIG_DESKTOP_USB_STACK_LEGACY) to enable error logs (CONFIG_USB_DEVICE_LOG_LEVEL_ERR, CONFIG_USB_DRIVER_LOG_LEVEL_ERR). Previously, the legacy USB stack logs were turned off. This change ensures visibility of runtime issues.
- Application configurations that emit debug logs over UART to use the CONFIG_DESKTOP_LOG_UART Kconfig option instead of explicitly configuring the logger. This is done to simplify the configurations.
Removed the application-specific Kconfig option (CONFIG_DESKTOP_RTT) that enabled RTT for nRF Desktop logging (CONFIG_DESKTOP_LOG) or nRF Desktop shell (CONFIG_DESKTOP_SHELL). nRF Desktop shell automatically enables RTT by default (CONFIG_USE_SEGGER_RTT). You can use the newly introduced application-specific Kconfig option CONFIG_DESKTOP_LOG_RTT for nRF Desktop RTT logging configuration. By default, this option makes the RTT log backend block the message until it is transferred to host (CONFIG_LOG_BACKEND_RTT_MODE_BLOCK) instead of dropping messages that do not fit in up-buffer (CONFIG_LOG_BACKEND_RTT_MODE_DROP). This is done to prevent dropping the newest logs.

nRF Machine Learning (Edge Impulse)

Deprecated the nRF Machine Learning application. Replaced by the Gesture Recognition application in Edge AI Add-on for nRF Connect SDK.

Thingy:53: Matter weather station

No changes since the latest nRF Connect SDK release.

Samples 

This section provides detailed lists of changes by sample.

Bluetooth samples

Bluetooth: Peripheral AMS client sample:
- Added support for the nrf54lm20dk/nrf54lm20a/cpuapp and nrf54lm20dk/nrf54lm20a/cpuapp/ns board targets.
Bluetooth: Peripheral ANCS client sample:
- Added support for the nrf54lm20dk/nrf54lm20a/cpuapp and nrf54lm20dk/nrf54lm20a/cpuapp/ns board targets.
Bluetooth: Peripheral HIDS keyboard sample:
- Added support for the nrf54ls05dk/nrf54ls05b/cpuapp board target.
Bluetooth: Peripheral HIDS mouse sample:
- Added support for the nrf54ls05dk/nrf54ls05b/cpuapp board target.

Bluetooth Mesh samples

Bluetooth Mesh: Device Firmware Update (DFU) distributor sample:
- Added a force disconnect of the mesh after provisioning to ensure the apps reconnect through the proxy service. This is a workaround for apps that do not properly close the PB-GATT connection after provisioning, especially after DFU. Disable CONFIG_BT_MESH_DK_PROV_PB_GATT_DISCONNECT to restore old behavior.
Bluetooth Mesh NLC: Lightness Controller/Energy Monitor sample with overlay-dfu.conf enabled:
- Added a force disconnect of the mesh after provisioning to ensure the apps reconnect through the proxy service. This is a workaround for apps that do not properly close the PB-GATT connection after provisioning, especially after DFU. Disable CONFIG_BT_MESH_DK_PROV_PB_GATT_DISCONNECT to restore old behavior.
Bluetooth Mesh NLC: Lightness Controller/Energy Monitor sample:
- Fixed an issue where stale RPL data could persist in EMDS after a node reset. The sample now uses the new bt_mesh_dk_prov_node_reset_cb_set() function to clear EMDS data when a node reset occurs, ensuring that stale RPL data is removed.

Bluetooth Fast Pair samples

Bluetooth Fast Pair: Locator tag sample:
- Updated the motion detector sensor on Thingy:53 target from gyroscope to accelerometer.

Cellular samples

Cellular: nRF Cloud MQTT FOTA and Cellular: nRF Cloud MQTT device message samples:
- Added support for JWT authentication by enabling the CONFIG_MODEM_JWT Kconfig option. Enabling this option in the prj.conf is necessary for using UUID as the device ID.
Cellular: Location:
- Added support for onboarding with nRF Cloud Utils by using AT commands to set up the modem and device credentials.
Cellular: Modem Shell sample:
- Added support for JWT authentication by enabling the CONFIG_MODEM_JWT Kconfig option. Enabling this option is necessary for using nRF Cloud Utils as an onboarding method.
- Removed JITP from the shell commands and references from the sample documentation.

Cryptography samples

Crypto: AES CCM sample:
- Added support for the nrf54lm20dk/nrf54lm20a/cpuapp board target.

Debug samples

No changes since the latest nRF Connect SDK release.

DECT NR+ samples

Added the nRF91x1: Hello DECT sample for demonstrating the use of the DECT NR+ stack with connection manager and IPv6 connectivity.
Added the nRF91x1: DECT NR+ Shell sample with the utilities for testing the DECT NR+ networking stack and modem features.
nRF91x1: DECT NR+ PHY Shell sample:
- Updated:
  - The dect rf_tool command - Major updates to improve usage for RX and TX testing.
  - Scheduler - Dynamic flow control based on load tier to prevent modem out-of-memory errors.
  - Settings - Continuous Wave (CW) support and possibility to disable Synchronization Training Field (STF) on TX and RX.

Edge Impulse samples

Deprecated Edge Impulse: Wrapper and Edge Impulse: Data forwarder samples. Replaced by samples in Edge AI Add-on for nRF Connect SDK.

Enhanced ShockBurst samples

Added:
- The Enhanced ShockBurst: Receiver with Bluetooth LE sample that demonstrates how to use the ESB protocol in PRX mode concurrently with the Bluetooth LE LBS service.
- The Enhanced ShockBurst: Transmitter with Bluetooth LE sample that demonstrates how to use the ESB protocol in PTX mode concurrently with the Bluetooth LE LBS service.

Gazell samples

No changes since the latest nRF Connect SDK release.

IronSide SE samples

No changes since the latest nRF Connect SDK release.

Keys samples

No changes since the latest nRF Connect SDK release.

Matter samples

Updated:
- The documentation for all Matter samples and applications to make it more consistent and easier to maintain and read.
- Partitions mapping for the nRF7002 DK in all Matter samples. See the migration guide for more information.
Matter: Manufacturer-specific:
- Added support for the NRF_MATTER_CLUSTER_INIT macro.
Matter: Closure:
- Added support for the Closure Control cluster test event triggers.
Matter: Door lock:
- Added:
  - Support for the Thread and Wi-Fi switching section in the nRF54LM20 DK with the nRF7002-EB II shield attached.
  - Lock data storage implementation based on the ARM PSA Protected Storage API, enabled with the CONFIG_LOCK_ACCESS_STORAGE_PROTECTED_STORAGE Kconfig option.
Matter: Light bulb:
- Added support for the AWS IoT integration in the nRF54LM20 DK with the nRF7002-EB II shield attached.

Networking samples

No changes since the latest nRF Connect SDK release.

NFC samples

No changes since the latest nRF Connect SDK release.

nRF5340 samples

No changes since the latest nRF Connect SDK release.

Peripheral samples

No changes since the latest nRF Connect SDK release.

PMIC samples

No changes since the latest nRF Connect SDK release.

Protocol serialization samples

No changes since the latest nRF Connect SDK release.

SDFW samples

No changes since the latest nRF Connect SDK release.

Sensor samples

No changes since the latest nRF Connect SDK release.

SUIT samples

No changes since the latest nRF Connect SDK release.

Trusted Firmware-M (TF-M) samples

No changes since the latest nRF Connect SDK release.

Thread samples

Added support for the nRF54L Series DKs in the following Thread sample documents:
- Thread: CoAP Client
- Thread: CoAP Server

Wi-Fi samples

No changes since the latest nRF Connect SDK release.

Other samples

No changes since the latest nRF Connect SDK release.

Drivers 

This section provides detailed lists of changes by driver.

Added the UART driver documentation.

Wi-Fi drivers

No changes since the latest nRF Connect SDK release.

Flash drivers

No changes since the latest nRF Connect SDK release.

Libraries 

This section provides detailed lists of changes by library.

Binary libraries

No changes since the latest nRF Connect SDK release.

Bluetooth libraries and services

Bluetooth Mesh provisioning handler for Nordic DKs module:

Added support for node reset callback. Applications can now register a callback using the bt_mesh_dk_prov_node_reset_cb_set() function to perform cleanup operations when a node reset occurs.

Common Application Framework

No changes since the latest nRF Connect SDK release.

Debug libraries

No changes since the latest nRF Connect SDK release.

DFU libraries

No changes since the latest nRF Connect SDK release.

Gazell libraries

No changes since the latest nRF Connect SDK release.

Security libraries

nRF Security library:
- Updated the header files at subsys/nrf_security/src/drivers/cracen/cracenpsa/include/ with Doxygen documentation.

Modem libraries

LTE link control library:
- Added:
  - Support for new PDN events LTE_LC_EVT_PDN_SUSPENDED and LTE_LC_EVT_PDN_RESUMED.
  - The CONFIG_LTE_LOCK_BAND_LIST Kconfig option to set bands for the LTE band lock using a comma-separated list of band numbers.
- Removed:
  - The default value for the CONFIG_LTE_LOCK_BAND_MASK Kconfig option.
  - The lte_lc_modem_events_enable() and lte_lc_modem_events_disable() functions. Instead, use the CONFIG_LTE_LC_MODEM_EVENTS_MODULE Kconfig option to enable modem events.
AT shell library:
- Added:
  - Support for AT command mode (shell bypass) using the CONFIG_AT_SHELL_CMD_MODE Kconfig option.
  - Tab-completion for known shell subcommands.
Location library:
- Added:
  - The CONFIG_LOCATION_METHOD_WIFI_SCANNING_PARAMS_OVERRIDE Kconfig option and related options CONFIG_LOCATION_METHOD_WIFI_SCANNING_DWELL_TIME_ACTIVE and CONFIG_LOCATION_METHOD_WIFI_SCANNING_DWELL_TIME_PASSIVE to configure Wi-Fi scan parameters.
  - The LOCATION_EVT_CANCELLED event that notifies the application when a location request has been cancelled.
- Fixed a bug where GNSS was never stopped if the location_cloud_location_ext_result_set() function was called during GNSS method execution.

Multiprotocol Service Layer libraries

Fixed:
- An issue with toggling of the REQUEST and STATUS0 pins when using the nRF700x coexistence interface on the nRF54H20 device.
- An issue where coexistence pin GPIO polarity settings were ignored when using the nRF700x coexistence interface.

Libraries for networking

nRF Cloud library:
- Added the nrf_cloud_coap_shadow_network_info_update() function to update the network information section in the device shadow over CoAP.
nRF Cloud P-GPS library:
- Updated the range for the CONFIG_NRF_CLOUD_PGPS_NUM_PREDICTIONS and CONFIG_NRF_CLOUD_PGPS_REPLACEMENT_THRESHOLD Kconfig options to values supported by nRF Cloud.
- Fixed an issue where preemptive updates were not always performed when expected.
- Removed the CONFIG_NRF_CLOUD_PGPS_PREDICTION_PERIOD Kconfig choice and related options (CONFIG_NRF_CLOUD_PGPS_PREDICTION_PERIOD_120_MIN and CONFIG_NRF_CLOUD_PGPS_PREDICTION_PERIOD_240_MIN).

Libraries for NFC

No changes since the latest nRF Connect SDK release.

nRF RPC libraries

No changes since the latest nRF Connect SDK release.

Other libraries

Added the Accel to angle library for converting three-dimensional acceleration into pitch and roll angles.
Hardware ID library:
- Updated by renaming the CONFIG_HW_ID_LIBRARY_SOURCE_BLE_MAC Kconfig option to CONFIG_HW_ID_LIBRARY_SOURCE_BT_DEVICE_ADDRESS.
Deprecated Edge Impulse wrapper library. Replaced by Edge Impulse SDK in Edge AI Add-on for nRF Connect SDK.
Emergency data storage library:
- Removed strict dependency on the Partition Manager. The Partition Manager can still be used with the library, but it is deprecated and not recommended for new designs.

Shell libraries

No changes since the latest nRF Connect SDK release.

sdk-nrfxlib

See the changelog for each library in the nrfxlib documentation for additional information.

Scripts 

This section provides detailed lists of changes by script.

Added:
- The Matter Sample Checker script to check the consistency of Matter samples in the nRF Connect SDK.
- The Bluetooth LE NUS shell script that forwards data between TCP clients and a Bluetooth LE device using the Nordic UART Service.
Software Bill of Materials script:
- Added sysbuild support for generating individual SBOM for each application.
- Updated to support Matter builds by detecting GN external projects and collecting their source files for SBOM generation.

Integrations 

This section provides detailed lists of changes by integration.

Google Fast Pair integration

No changes since the latest nRF Connect SDK release.

Edge Impulse integration

No changes since the latest nRF Connect SDK release.

Memfault integration

Added:
- The CONFIG_MEMFAULT_NCS_POST_INITIAL_HEARTBEAT_ON_NETWORK_CONNECTED Kconfig option to control whether an initial heartbeat is sent when the device connects to a network This shows the device status and initial metrics in the Memfault dashboard soon after boot.
- Support for recording location metrics when using external cloud location services (CONFIG_LOCATION_SERVICE_EXTERNAL).

AVSystem integration

No changes since the latest nRF Connect SDK release.

nRF Cloud integration

Updated by enabling a transform request for topic prefix and pairing during connection initialization to nRF Cloud in the MQTT finite state machine (FSM).
Fixed a hang in the nRF Cloud log backend caused by incorrect error handling. When the semaphore cannot be acquired, the function now returns the original size instead of 0, allowing the logging system to proceed correctly.

CoreMark integration

No changes since the latest nRF Connect SDK release.

DULT integration

No changes since the latest nRF Connect SDK release.

The MCUboot fork in nRF Connect SDK (sdk-mcuboot) contains all commits from the upstream MCUboot repository up to and including 8d14eebfe0b7402ebdf77ce1b99ba1a3793670e9, with some nRF Connect SDK specific additions.

The code for integrating MCUboot into nRF Connect SDK is located in the ncs/nrf/modules/mcuboot folder.

The following list summarizes both the main changes inherited from upstream MCUboot and the main changes applied to the nRF Connect SDK specific additions:

No changes since the latest nRF Connect SDK release.

Zephyr 

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

For the list of upstream Zephyr commits (not including cherry-picked commits) incorporated into nRF Connect SDK since the most recent release, run the following command from the ncs/zephyr repository (after running west update):

git log --oneline 93b5f19f99 ^911b3da139

For the list of nRF Connect SDK specific commits, including commits cherry-picked from upstream, run:

git log --oneline manifest-rev ^93b5f19f99

The current nRF Connect SDK main branch is based on revision 93b5f19f99 of Zephyr.

Note

For possible breaking changes and changes between the latest Zephyr release and the current Zephyr version, refer to the Zephyr release notes.

Additions specific to nRF Connect SDK

No changes since the latest nRF Connect SDK release.

Added a section in nRF54H20 power management optimization about optimizing power on the nRF54H20 SoC by relocating the radio core firmware to TCM.
Updated the Emergency data storage library documentation to use static device tree partitions instead of the Partition Manager.
Removed references to JITP in different areas of the documentation.