Silicon Labs Matter Version 2.7.0-1.4 (September 29, 2025) - Release Notes#

Simplicity SDK Version 2025.6.2

This is the Silicon Labs Matter v2.7.0-1.4 release, which provides the functionality to build Matter applications in the Simplicity Studio environment. This release is intended for developers who wish to run a Matter Demo over Thread (15.4) or Wi-Fi, and also manually build examples through Simplicity Studio, SLC-CLI or Visual Studio Code.

This release is certifiable to the Connectivity Standards Alliance (CSA) Matter 1.4.2 certification program (https://csa-iot.org/) for Thread (MG24, MG26 and MG30) and Wi-Fi (SiWx917 and MG24 / WF200).

Release Summary#

Key Features | API Changes | Bug Fixes | Chip Enablement

Key Features#

Added In 2.7.0#

  • Quality-tested Matter 1.4.2 solution for Thread MG24 / MG26, Wi-Fi SiWG917 SoC and SiWN917 NCP mode, Wi-Fi MG24/WF200 and Wi-Fi MG24/RS9116 (non-sleepy).

  • Provides GA support for Matter Wi-Fi SiWx917.

  • Enabled support for Matter + AWS (formerly DIC) - Alpha Quality.

  • Provides support for Matter Thread and CMP with SiMG301x.

  • Support for Scenes in Matter added with Matter 1.4.2.

  • Fixed the mDNS and CASE session timeouts observed on Wi-Fi SiWx917.

  • Added Optimized LwIP package in the Matter Extension for improved power efficiency on Wi-Fi Devices.

  • Deprecation notice for Wi-Fi MG24/RS9116.

  • Removed experimental feature to use the TCP/IP NetX stack.

  • Works with Simplicity SDK v2025.6.2 and WiSeConnect SDK v3.5.2.

  • RGB LED support with the SiWG917 DevKit.

  • Miscellaneous bug fixes and improvements.

API Changes#

None.

Bug Fixes#

Fixed In 2.7.0#

Resolved the timeout issues seen on Wi-Fi SiWx917.

Chip Enablement#

This release supports series 2 and series 3 EFR32 devices. Use v2.2.x-1.2 for series 1 devices.

Key Features#

New Features | Enhancements | Removed Features | Deprecated Features

New Features#

Added In 2.7.0#

  • Provides support for Matter Thread and CMP with SiMG301x.

  • Support for Scenes in Matter added with Matter 1.4.2.

  • RGB LED support with the SiWG917 DevKit.

  • Enabled support for Matter + AWS (formerly DIC) - Alpha Quality.

Enhancements#

Added Optimized LwIP package in the Matter Extension for improved power efficiency on Wi-Fi Devices.

Removed Features#

Removed experimental feature to use the TCP/IP NetX stack.

Deprecated Features#

Deprecation notice for Wi-Fi MG24/RS9116.

API Changes#

New APIs | Modified APIs | Removed APIs | Deprecated APIs

New APIs#

None.

Modified APIs#

None.

Removed APIs#

None.

Deprecated APIs#

None.

Bug Fixes#

Fixed In 2.7.0#

ID

Issue Description

GitHub / Salesforce Reference (if any)

Affected Software Variants, Hardware, Modes, Host Interfaces

1490451

Fixed Build errors in the Thermostat application.

None

EFR32+WF200

1225970

Fixed mDNS timeouts while sending commands.

None

SiWx917

1200114

Fixed CASE Session timeouts.

None

SiWx917

1357133

Fixed Commissioning issue during the WiFi network enable ste.p

None

SiWx917

1382232

Fixed Commissioning issue seen at the SendComplete step.

None

SiWx917

1387498

Fixed Multi-admin test case failure seen with the sleepy applications on Samsung ecosystems.

None

SiWG917

1482407

Fixed the power on the SiWx917 when it is commissioned to a Google Home ecosystem using an Apple device.

None

SiWx917

1502911

Fixed the step attribute control for the Refrigerator app and added support for other endpoints

None

All

1481482

Enabled the JLink logging by default with EFR32+WF200 fixing commissioning issues

None

EFR32+WF200

1463849

Improves the time it takes to reconnect after a power cycle.

None

SiWN917

1490591

Cleanup of Matter ICD WiFi misleading error logs

None

SiWx917

1388176

Added support to suppress alarm on refrigerator app using Matter shell

None

All

1481482

Fixed build errors in Matter over Wi-Fi solutions for custom (empty) board configurations

None

SiWx917

1483333

Added missing defines for OpenThread CoAP libraries

None

All

1496505

Fixed logs retry message that was incorrectly reporting an extra UDP retry message

SiliconLabsSoftware/matter_sdk/pull/578

All

Chip Enablement#

Matter over Thread is supported on the following boards#

  • MG24 boards:

  • MGM24 boards:

    • BRD4316A / SLWSTK6006A / Wireless Start Kit / 2.4GHz@10dBm - xGM240-RB4316A

    • BRD4317A / SLWSTK6006A / Wireless Starter Kit/ 2.4GHz@20dBm - xGM240-RB4317A

    • BRD4318A / SLWSTK6006A / Wireless Starter Kit/ 2.4GHz@20dBm - xGM240-RB4318A

    • BRD4319A (Rev A00 only) / SLWSTK6006A / Wireless Starter Kit/ 2.4GHz@20dBm

    • BRD2704A / Sparkfun Thing Plus MGM240P

    • BRD4337A / SLWSTK6006A / Wireless Starter Kit / 2.4GHz@20dBm - xGM240-RB4337A

  • MG26 boards

    • BRD4116A

    • BRD4117A

    • BRD4118A

    • BRD4120A

    • BRD4121A

    • BRD2608A

    • BRD2709A

  • MGM26 boards

    • BRD4350A

    • BRD4351A

  • MG30 Boards

    • BRD4407A

    • BRD4408A

    • BRD2719A

Matter over Wi-Fi is supported on the following boards#

  • SoC mode:

    • BRD4338A / SiWG917 Wi-Fi 6 and Bluetooth LE 8 MB Flash SoC Pro Kit - SiWx917-PK6031A

    • BRD2605A / SiWG917 Wi-Fi 6 and Bluetooth LE Dev Kit - SiWx917-DK2605A

    • BRD4342A / SiWG917 Wi-Fi 6 and Bluetooth LE 8 MB Flash + 8 MB ext PSRAM Radio Board with an internal RF switch - SiWx91x-RB4342A

    • BRD4343A / SiWG917Y Module Wi-Fi 6 and Bluetooth LE 8MB Flash RF-Pin Radio Board - SiW917Y-RB4343A

    • Early access for new module board BRD2708A / SiW917Y-EK2708A

  • NCP mode:

Note: Firmware for RS9116, SiWN917 NCP & SiWG917 SoC can be found in the Matter Software Artifacts page in the documentation or Assets section of this page. Connectivity firmware update is mandatory for new release binaries.

Application Example Changes#

New Examples | Modified Examples | Removed Examples | Deprecated Examples

For the list of supported application examples, see Existing Examples. For the details on Matter ecosystems support, see Ecosystems.

New Examples#

None.

Modified Examples#

None.

Removed Examples#

None.

Deprecated Examples#

None.

Known Issues and Limitations#

ID

Issue or Limitation Description

GitHub / Salesforce Reference (if any)

Workaround (if any)

Affected Software Variants, Hardware, Modes, Host Interfaces

The Matter logs are printed to the UART interface by default. To view the logs, use the Simplicity Studio console or a standalone terminal emulator such as PuTTY. The logging destination can be controlled by installing the "Logging To UART" or the "Logging to RTT" component under Matter -> Platform -> Utils in a Matter Studio project.

None

All

The Matter device images require approximately 700k in flash space. As a result, only a subset of EFR32MG2x devices are supported. For a complete list of devices supported, consult the documentation located at Matter Hardware Requirements.

None

All

On Windows, Matter projects in Simplicity Studio may fail to build due to a known issue with GCC response files and the operating system's command string length limit.

None

When creating a new project, use shorter Solution and Project names and choose a shorter directory path for the project location.

All

A Matter SDK Issue: (https://github.com/project-chip/connectedhomeip): BLE Connection/Timeout error occurs occasionally during commissioning with the chip-tool running on Raspberry Pi or Linux (project-chip#16178). Running on these platforms requires an access point with both 2.4 GHz and 5 GHz capabilities. There is BLE-Wi-Fi interference when connected over the 2.4 GHz channel.

None

This is resolved by connecting the chip-tool device to a 5 GHz SSID and the end device to a 2.4 GHz SSID for the same Wi-Fi network.

All

In some rare cases, a Simplicity Studio project build may fail due to missing files in the zap-generated/ directory (e.g. "gen_config.h not found").

None

Delete the .zap folder in the home directory.

All

1197733 1228823

Due to an electrical issue on the WPK main boards (BRD4002x), sometimes the current measurement value reported is wrong in the Energy Profiler, making it seem like an ICD is not going to sleep properly even though it is. This issue does not happen when using a WSTK (BRD4001x).

None

All

1416694

The configuration parameters for the internal storage bootloader used in the OTA software updates must always be custom-configured based on the actual image size for the given application. See https://docs.silabs.com/matter/2.7.0/matter-ota/01-ota-bootloader.

None

All

1445664

Chip-Cert executable cannot be used in Windows installations of Simplicity Studio v5.

None

All

Matter/Thread: Silicon Labs has provided a complete image file for the Raspberry Pi that can be flashed onto an SD card to create the Matter Hub, which is a Raspberry Pi running Ubuntu and includes a pre-built version of the Open Thread Border Router (OTBR) and chip-tool. The image we have provided is quite large, ~2 GB. As a result, it can take quite a while to download the .zip file and flash it onto an SD card. Depending on your connection, the process could take up to half an hour. Regardless, the demo and development experiences using this pre-built image are a much faster process than building the Matter Hub from scratch.

None

EFR32

Matter/Thread: Matter attestation credentials can conflict with Lockbits in Series 2, requiring moving the location of the attestation credentials when lockbits are used. Please see the guide Moving the Matter Attestation Credentials on Series 2 (MG24) for details. (1235425)

None

EFR32

1378481

USART for IO Stream (RTT) is not supported in Matter Extension v2.4.0-1.4

None

EFR32

1418676

Possible race condition in UART driver when excessive use of the Matter shell is performed (sending commands every 250 ms).

None

Reduce the command rate.

EFR32

1453646

Level attribute may get incorrectly changed on level-control stop.

None

EFR32

Enabling "Logging to RTT" with SiWG917 SoC results in OTA update failure due to JLink connection preventing soft reset.

None

Enabled UART logging

SiWG917

1358324

The BRD4342A PSRAM support is enabled only for the text segment; it is not working for the data and BSS segments.

None

None

BRD4342A

1366720

BLE scan issues are observed with Raspberry Pi when the distance between the device and the controller exceeds 3 meters in the SQA lab environment.

None

None

SiWG917

The P37 pin must be pulled up to enable the Matter shell or before executing any JLink command for sleepy applications.

None

None

SiWG917

1409219

On the BRD2605A board, RGB LED pins are not configurable via the LED component or Pin Tool, requiring manual updates to the RTE device file for any new LED pin configurations.

None

Hardware limitation.

SiWG917

1407412

The Matter over WiFi sample apps are currently hard-coded to the US region by default.

None

Add the #define REGION_CODE <region-code>in sl_matter_wifi_config.h file.

SiWG917

In the EFR32MG24+WF200 device combination, the WF200 firmware exception is observed when both the ICD and Matter shell are enabled. To enable the Matter shell to work with the Lock application on this device combination, ICD must be disabled.

None

Hardware limitation

SLEXP8022A - WF200 Wi-Fi Expansion Kit

The external bootloader should not be used with the EFR32MG24+RS9116/SiWN917 NCP device combination. Only use the internal bootloader.

None

None

SiWN917

OTA Update: sometimes boot loading with the latest image does not work with the EFR32MG24+WF200 device combination.

None

This issue is resolved by applying the workaround described in the Matter Wi-Fi FAQ.

SLEXP8022A - WF200 Wi-Fi Expansion Kit

SiWN917 NCP application OTA upgrade with upgraded WiSeConnect SDK may not be backward compatible with the existing TA.

None

None

SiWN917

Group commands only work for some specific access points when IGMP snooping is disabled.

None

None

All Wi-Fi boards

1085568

With EFR32 MG24 + RS9116 after going idle for some time, Apple devices may not be able to control an LED.

None

None

RS9116

When setting up the Ozone Debugger on Mac, the location of the JLinkDevices.xml file has moved. Follow this documentation to place it in the proper location.

None

None

NA

1381843

LCD is disabled on RS9116 and SiWN917 NCP.

None

LCD is disabled.

SiWN917, RS9116

1485988

Matter provisioning fails when using CSR over BLE.

None

None

All

1436465

Matter/Zigbee CMP Lighting app may reset when add-scene command is received.

None

None

All

1446715

Some warnings shown in ZAP for certain sample apps (ex: Air Quality Sensor example).

None

None

All

1511471

CMP app on MG26 Device can very rarely hang when encrypting/decrypting CASE session sigma messages.

None

None

EFR32/MG26x

1515075

SiMG301x apps can rarely become unresponsive during ACL extension operations when heap runs low.

None

None

SiMG301x

1448029

Build issue when using SL_MATTER_CMP_SECURE_ZIGBEE with the Matter/Zigbee CMP Lighting app.

None

None

All

1517161

Forced NVM3 Repack might add delays during boot or NVM3 heavy operations.

None

None

All

1513687

Observed issues creating second fabric with Amazon Alexa related to hardware and version.

None

None

All

Impact of Release Changes#

Impact Statements | Migration Guide

Impact Statements#

None.

Migration Guide#

sl_main migration: See sl_system to sl_main migration guide for detailed instructions.

Using This Release#

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

What's in the Release?#

  • Silicon Labs Matter Extension for use with Simplicity Studio and SLC-CLI

  • Silicon Labs Matter sample applications

Compatible Software#

Software

Compatible Version or Variant

Simplicity SDK

2025.6.2

WiSeConnect SDK

v3.5.2

GCC (The GNU Compiler Collection)

12.2.1 (provided with Simplicity Studio)

Installation and Use#

To get started, download Simplicity Studio from the following link: https://www.silabs.com/developers/simplicity-studio, and install Simplicity SDK v2025.6.2 along with Silicon Labs Matter v2.7.0. For SiWx917, install WiSeConnect v3.5.2 as well.

Quick-start guides are provided for running pre-compiled demos and for building examples manually.

The Developer's Guide provides information on various technical topics.

For details on Studio project upgrades, see Project Upgrades.

In order to run Matter over Thread, a developer must have a Silicon Labs EFR-based device and either:

  • another EFR-based device and a Raspberry Pi with a 32 GB SD Card

  • or an ecosystem device with OpenThread Border Router capabilities, such as Amazon Echo, Apple HomePod, Samsung SmartThings Hub or Google Nest Hub Wi-Fi.

In order to run Matter over Wi-Fi, a developer must have the following hardware:

  • Silicon Labs Wireless starter/development kit, which is mentioned below.

  • Raspberry Pi with a 32 GB SD Card or an ecosystem with Matter support

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

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:

  1. Go to https://community.silabs.com/.

  2. Log in with your account credentials.

  3. Click your profile icon in the upper-right corner of the page.

  4. Select Notifications from the dropdown menu.

  5. In the Notifications section, go to the My Product Notifications tab to review historical Security and Software Advisory notifications.

  6. 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.

Help and Feedback#

Note: Ask AI is experimental.

SDK Release and Maintenance Policy#

See our SDK Release and Maintenance Policy.

Additional Information#

Existing Examples#

Matter over Thread is supported in Simplicity Studio for the following applications#

  • Light

  • Light Switch

  • Lock

  • Window Covering

  • Thermostat

  • OnOff Plug

  • Sensor

  • Dishwasher

  • Air Quality Sensor

  • Refrigerator

  • Zigbee/Matter CMP Lighting

Matter over Wi-Fi is supported in Simplicity Studio for the following applications#

  • SoC and Dev Kit supported applications:

  • Light

  • Lock

  • Light Switch

  • Window Covering

  • OnOff Plug

  • Thermostat

  • Dishwasher

  • Air Quality Sensor

  • Sensor

  • Fan Control

  • Refrigerator

  • NCP supported applications:

  • Lock

  • Thermostat

  • Window Covering

  • Note: SiWN917 NCP is the only device combination that supports the Window Covering App.

Matter over Wi-Fi ICD is supported for the following applications#

  • Lock (ICD is enabled by default)

  • With chip-tool

  • With EFR32xG24 with SiWN917 in NCP mode

  • Window Covering (ICD is enabled by default)

  • With chip-tool

  • With EFR32xG24 with SiWN917 in NCP mode

  • Thermostat

  • With chip-tool

  • With EFR32xG24 with RS9116, SiWN917 in NCP mode

  • Light Switch

  • With chip-tool

  • With SiWG917 SoC

Reference guide to enable the sleepy functionality for Wi-Fi: Wi-Fi ICD.

Ecosystems#

This release has been tested and proven to work for commissioning and control with the following Ecosystems on the hardware and software versions listed below:

Google#

Silicon Labs Device

Application

Hub

Phone

App Software

Wi-Fi Access Point

Thread

BRD4187C

lighting/Lock/Window/Multi-sensor-app

Hardware: Google Nest Hub, Model : GUIK2 Software: Hub SoftwareChromcast 3.76.463359

Hardware: OPPO Reno CPH1919 Software: Android version 12

Google Home version: 3.30.1.6

ASUS (Model: XT8)

Wi-Fi

SiWx917 SoCBRD4338A

lighting/Lock/Window/Multi-sensor-app

Hardware: Google Nest Hub, Model : GUIK2 Software: Hub Software Version: Chromcast 3.76.463359

Hardware: OPPO Reno CPH1919 Software: Android version 12

Google Home version: 3.30.1.6

ASUS (Model: XT8)

Apple#

Silicon Labs Device

Application

Hub

Phone

App Software

Wi-Fi Access Point

Thread

BRD4187C

lighting/Lock/Window/Multi-sensor-app

Hardware: Home Pod MiniSoftware: 18.5 (22L572)

Hardware: iPhone 12 pro Software: 17.6

Apple Home17.6.1

ASUS (Model: XT8)

Wi-Fi

SiWx917 SoC

lighting/Lock/Window/Multi-sensor-app

Hardware: Home Pod MiniSoftware: 18.5 (22L572)

Hardware: iPhone 12 proSoftware : 17.6

Apple Home17.6.1

ASUS (Model: XT8)

Amazon#

Silicon Labs Device

Application

Hub

Phone

App Software

Wi-Fi Access Point

Thread

BRD4187C

lighting/Window/Multi-sensor-app

Hardware: Echo 4th Gen Model: L4S3RE Software: Hub Software Version: 11779349892

Hardware: OPPO Reno CPH1919 Software: Android version 12

Alexa version: 2.2.6607727

ASUS (Model: XT8)

Wi-Fi

SiWx917 SoCBRD4338A,

lighting/lock/Window/Multi-sensor-app

Hardware: Echo 4th Gen Model: L4S3RE Software: Hub Software Version: 11779349892

Hardware: OPPO Reno CPH1919 Software: Android version 12

Alexa version: 2.2.6607727

ASUS (Model: XT8)

Samsung#

Silicon Labs Device

Application

Hub

Phone

App Software

Wi-Fi Access Point

Thread

BRD4187C

lighting/lock/Window/Multi-sensor-app

Hardware: SmartThings Station Software: Hub Software Version: 000.052.00009 Hardware: Charging Hub Software Controller version: 1.0.15-5

Hardware: Pixel 5a Software: Android version 14

SmartThings Version: 1.7.19.19

ASUS (Model: XT8)

Wi-Fi

SiWx917 SoCBRD4338A,

lighting/lock/Window/Multi-sensor-app

Hardware: SmartThings Station Software: Hub Software Version: 000.056.00011

Hardware: OPPO Reno CPH1919 Software: Android version 12

SmartThings Version: 1.8.29.24

ASUS (Model: XT8)

Project Upgrades#

Owing to the substantial changes introduced in Matter 1.4.2, using Studio’s automatic project upgrade flow is not advised with the current release. Follow these steps to upgrade an existing project to Matter Extension 2.7.0:

  • Create a new 2.7.0 project for the same application type (Lighting, Lock, etc.).

  • For each of the files in the project's src/ and include/ directories that were modified from their original version, apply the corresponding changes to the new project.

  • Replicate the non-default component configurations used in the original project.

  • Using the ZAP tool, replicate the additional cluster configurations applied in the original project.

Matter Software Artifacts#

Matter Software Artifacts: https://docs.silabs.com/matter/2.7.0/matter-prerequisites/matter-artifacts.