Zigbee Version 9.0 - Release Notes (Jan 22, 2026)#

Simplicity SDK Version 2025.12.0

Silicon Labs is the vendor of choice for OEMs developing Zigbee networking into their products. The Silicon Labs Zigbee platform is the most integrated, complete, and feature-rich Zigbee solution available.

Silicon Labs EmberZNet SDK contains Silicon Labs’ implementation of the Zigbee stack specification.

Click here for earlier releases.

Release Summary#

Release Item	Version	Release Date	Release Notes	Key Features	API Changes	Bug Fixes	Chip Enablement
SDK	9.0	Jan 22, 2026	Release Notes	Refer to the Key Features section.	Refer to the API Changes section.	Refer to the Bug Fixes section.	Refer to the Chip Enablement section.
802.15.4 Mesh + BLE Multiprotocol	9.0	Jan 22, 2026	Release Notes	Concurrent Listening support with CMP on SiMG301x. Bi-directional Green Power support with CMP Zigbee NCP + OpenThread RCP.	None	Targeted quality improvements and bug fixes.	xGM270S Leopard SiP Module GA SW support. xG301 Explorer Kit and Pro-kit support.

Impact of Release Changes#

Impact Statements | Migration Guide

Impact Statements#

None.

Migration Guide#

See the sl_system to sl_main migration guide for detailed instructions.
Learn more about using sl_system_compatibility in baremetal applications here.

Using This Release#

What's in the Release? | Compatible Software | Installation and Use | Help and Feedback

What's in the Release?#

This release contains the following:

Zigbee Stack
Zigbee Application Framework
Zigbee Sample Applications

For more information about Zigbee and the EmberZNet SDK see Zigbee Fundamentals.

If you are a first-time user, see Zigbee EmberZNet Quick-Start Guide for SDK 7.0 and Higher, for instructions on configuring your development environment, building and flashing a sample application, and documentation references pointing to next steps.

Compatible Software#

Compatibility and Use Notices: For information about security updates and notices, see the Security chapter of the Platform Release Notes installed with this SDK or on the TECH DOCS tab on https://www.silabs.com/developers/zigbee-emberznet. Silicon Labs also strongly recommends that you subscribe to Security Advisories for up-to-date information.

For instructions, or if you are new to the Zigbee EmberZNet SDK, see Using This Release.

Software	Compatible Version or Variant
IAR Embedded Workbench for ARM (IAR-EWARM) Using wine to build with the IarBuild.exe command line utility or IAR Embedded Workbench GUI on macOS or Linux could result in incorrect files being used due to collisions in wine’s hashing algorithm for generating short file names. Customers on macOS or Linux are advised not to build with IAR outside of Simplicity Studio. Customers who do should carefully verify that the correct files are being used. Note: Users are reminded that applications intended for Series 3 parts are not supported with the IAR toolchain in this release.	Version 9.40.1
GCC (The GNU Compiler Collection)	Version 12.2.1
EZSP Protocol	Version 0x12

Installation and Use#

To run your first demo, see our Getting Started Guide.

To kick start your development, see our Developer's Guide.

For information about Secure Vault Integration, see Secure Vault.

To review Security and Software Advisory notifications and manage your notification preferences:

Go to https://community.silabs.com/.
Log in with your account credentials.
Click your profile icon in the upper-right corner of the page.
Select Notifications from the dropdown menu.
In the Notifications section, go to the My Product Notifications tab to review historical Security and Software Advisory notifications
To manage your preferences, use the Manage Notifications tab to customize which product updates and advisories you receive.

To learn more about the software in this release, dive into our online documentation.

Additional Information#

Zigbee Certification

The EmberZNet 9.0 release is qualified as a Zigbee Compliant Platform for SoC, NCP and RCP architectures. For ZCP certification ID tied to this release, please check the CSA website here: https://csa-iot.org/csa-iot_products/.

Note that the ZCP certification is filed post-release and takes a few weeks before getting reflected on the CSA website. For any further queries, please contact Silicon Laboratories support at http://www.silabs.com/support.

Help and Feedback#

Contact Silicon Labs Support.
To use our Ask AI tool to get answers, see the search field at the top of this page.
Note: Ask AI is experimental.
Get help from our developer community.

Feature Matrix#

Supported Features | Unsupported Features

Supported Features#

Feature Name	Description	Quality	Related API Names	Supported Software Variants, Hardware, Modes, Host Interfaces	Related Example Names
Zigbee 4.0 compliance with BDB 3.1 and R23 support	This release is Zigbee 4.0 certification-ready, with BDB 3.1 and R23 features incorporated.	Production		SoC Host-NCP	Zigbee - Z4Light Zigbee - Z4Switch
Dynamic switching of Zigbee node type between router and sleepy end device	This features allows an image to dynamically switch between a router and a sleepy end device at runtime. This is not to be confused with the multi-network feature, where an image can be configured with two device types operating on different networks (for that, see AN724).	Production	sl_zigbee_af_switch_role_router sl_zigbee_af_switch_role_sleepy_end_device	SoC	All
Inter-PAN messages filtering update	Updated filtering of inter-PAN message to support multiple filters matching regardless of whether ZLL or custom filters match. The matched filter value will be passed up to the application using sli_802154_stack_filter_match_message_handler().	Production	sl_zigbee_af_mac_filter_match_message_cb sl_zigbee_ezsp_mac_filter_match_message_handler sl_802154_filter_match_message_handler	SoC Host-NCP	All

Unsupported Features#

Feature Name	Description	Quality	Related API Names	Supported Software Variants, Hardware, Modes, Host Interfaces	Related Example Names
IAR toolchain for Series 3	Users are reminded that applications intended for Series 3 parts are not supported with the IAR toolchain in this release.	Production		SoC NCP CPC	Series 3
Zigbee NCP SPI Applications on Series 3	Applications utilizing direct SPI access (that is, without the use of CPC) are currently not working for Series 3 hardware. This includes the "Zigbee - NCP ncp-spi" and "Zigbee - NCP MpNcpSpi" applications, as well as any application that brings in the "NCP SPI" component. Generations of such applications will fail, indicating unmet dependencies or incompatible dependencies.	Production	NA	NCP SPI	Series 3

SDK Release and Maintenance Policy#

See our SDK Release and Maintenance Policy.