Bluetooth LE Version 11.1.0 - Release Notes (Jun 23, 2026)#

Silicon Labs is a leading vendor in Bluetooth hardware and software technologies, used in products such as sports and fitness, consumer electronics, beacons, and smart home applications. The core SDK is an advanced Bluetooth 6.1-compliant stack that provides all of the core functionality along with multiple API to simplify development. The core functionality offers both standalone mode, allowing a developer to create and run their application directly on the SoC, or NCP mode, allowing for the use of an external host MCU.

Click here for earlier releases.

Release Summary#

Release Item Version Release Date Release Notes Key Features API Changes Bug Fixes Chip Enablement
Example and Middleware 11.1.0 Jun 23, 2026 Release Notes
  • Added Serial Port Profile (SPP) middleware.
  • Expanded Bluetooth peer manager/security and enhanced Channel Sounding.
 None Fixed the host UART interface to avoid wrong-handle use after select() by migrating to poll(). None
Host Stack 11.1.0 Jun 23, 2026 Release Notes
  • Added periodic advertising ADI/data ID refresh and duplicate filtering.
  • Added connection-handle conversion and connection analyzer LLCP synchronization support.
  • Added privacy RPA randomization/refresh events, peer RPA reading, and CS handover support.
 Added new APIs for periodic advertising data management, duplicate filtering, connection handle conversion, privacy RPA management, peer RPA reading, and CS handover. Fixed Resolving List local IRK handling and corrected sl_bt_cs_test_start() antenna-selection documentation. None
Controller 11.1.0 Jun 23, 2026 Release Notes
  • Added ADI support in Periodic Advertising and PAwR.
  • Added Channel Map Update Indication support for the periodic advertising advertiser.
  • Improved BLE power efficiency, extended CTE antenna switching, and moved active/passive AFH selection to the AFH component.
 Added new Bluetooth Low Energy Common configuration options, removed host adaptation IRQ priority settings, and deprecated older core/controller buffer and RF path gain configurations. Fixed CPC reconnection, extended advertising TX power handling, scan-window overrun while following extended advertising, LE Periodic Advertising feature reporting, and Connection Analyzer RSSI reporting. None
802.15.4 Mesh + BLE Multiprotocol 11.1.0 Jun 23, 2026

Release Notes
  • Added CMP co-processor sample applications running Zigbee NCP, OpenThread RCP, and Bluetooth RCP.
  • Added Alpha Android 15 host development support with ZigbeeD libraries and source to build ZigbeeD and OTBR host applications.
  • Standardized Multiprotocol sample application names, project layout, and Simplicity Studio display titles.
  • Reorganized multiprotocol package file paths for a more cohesive structure.

Removed sl_802154_radio_set_scheduler_priorities().

Targeted quality improvements and bug fixes.

Added Alpha software support for xG2B devices.

Impact of Release Changes#

Impact Statements | Migration Guide

Impact Statements#

None.

Using This Release#

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

What's in the Release?#

Compatible Software#

Software Compatible Version or Variant
Simplicity SDK 2025.12.3
Simplicity Studio Any version that is compatible to Simplicity SDK 2025.12
Simplicity Commander provided with Simplicity Studio
GCC (The GNU Compiler Collection) 12.2.1 (provided with Simplicity Studio)
IAR Embedded Workbench for ARM (IAR-EWARM) 9.40.1

Installation and Use#

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#

SDK Release and Maintenance Policy#

See our SDK Release and Maintenance Policy.