RAIL SDK Version 3.1.0 - Release Notes (Jun 23, 2026)#
The RAIL SDK is a complete software development suite for proprietary wireless applications. It was previously part of the Proprietary SDK. Starting with the RAIL SDK 2.18.0 release, Proprietary SDK is split into RAIL SDK and Connect SDK.
Silicon Labs RAIL (Radio Abstraction Interface Layer) is an intuitive and easily-customizable radio interface layer designed to support both proprietary and standards-based wireless protocols.
The RAIL SDK is supplied with extensive documentation and sample applications.
Release Summary#
Key Features | API Changes | Bug Fixes | Chip Enablement
Key Features#
None.
API Changes#
None.
Bug Fixes#
None.
Chip Enablement#
None.
Key Features#
New Features | Enhancements | Removed Features | Deprecated Features
New Features#
None.
Enhancements#
None.
Removed Features#
None.
Deprecated Features#
None.
API Changes#
New APIs | Modified APIs | Removed APIs | Deprecated APIs
New APIs#
None.
Modified APIs#
None.
Removed APIs#
None.
Deprecated APIs#
None.
Bug Fixes#
None.
Chip Enablement#
None.
Application Example Changes#
New Examples | Modified Examples | Removed Examples | Deprecated Examples
New Examples#
None.
Modified Examples#
None.
Removed Examples#
None.
Deprecated Examples#
None.
Impact of Release Changes#
Impact Statements | Migration Guide
Impact Statements#
None.
Migration Guide#
Click here for the migration guide for deprecated, removed, and modified items.
Known Issues and Limitations#
| ID | Issue or Limitation Description | GitHub / Salesforce Reference (if any) | Workaround (if any) | Affected Software Variants, Hardware, Modes, Host Interfaces |
|---|---|---|---|---|
| 1268208 | The power consumption of DK2600 can't be optimized if the configuration time for EM2 and if UART are both being used, as the value of SL_IOSTREAM_USART_{instance}_BAUDRATE does not take effect. The default value used instead is 115200 bps. Typical use case is RAIL - SoC Wireless M-bus Meter with DK2600 board. | None | Update UART baud rate to 9600 bps at Simplicity Studio Admin Console. This is necessary for EM2. |
|
| 1274248 | Range Test DMP instabilities in case of LTO. | None | Do not use LTO. |
|
| 1375450 | Wi-SUN HAN phys aren't supported by Standard packet assembler and Packet Assistant components. | None | Do not use Wi-SUN HAN phys with RAIL SDK sample applications. |
|
| Updating the Baremetal sample applications to RTOS causes build errors. | None |
Follow the Platforms guide sl_main Baremetal to RTOS Application Transition. |
|
Using This Release#
What's in the Release? | Compatible Software | Installation and Use | Help and Feedback
What's in the Release?#
RAIL SDK showcasing the usage of the RAIL library
Compatible Software#
None.
Installation and Use#
To upgrade your existing software with this release, see instructions here.
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:
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.
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.
SDK Release and Maintenance Policy#
See our SDK Release and Maintenance Policy.