Bluetooth LE SDK Example and Middleware Version 11.0.1 - Release Notes (Mar 25, 2026)#

Bluetooth LE Version 11.0.1

The Bluetooth 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, in NCP mode, allowing for the use of an external host MCU.

Click here for earlier releases.

Release Summary#

Key Features | API Changes | Bug Fixes | Chip Enablement

Key Features#

Added in 11.0.1#

Channel Sounding: added support for max_procedure_count=1 in Real Time Fast mode.

Added in 11.0.0#

  • Host examples shown on Studio Launcher page.

  • Most bootloader-aware example applications converted to standalone to simplify early development.

API Changes#

None.

Bug Fixes#

Fixed in 11.0.1#

Targeted quality improvements and bug fixes.

Fixed in 11.0.0#

  • Various Electronic Shelf Label (ESL) related bug fixes.

  • Various Channel Sounding (CS) related bug fixes.

  • Targeted quality improvements and bug fixes.

Chip Enablement#

Added in 11.0.1#

None.

Added in 11.0.0#

Added xGM270S SiP module support.

Key Features#

New Features | Enhancements | Removed Features | Deprecated Features

New Features#

None.

Enhancements#

Added in 11.0.1#

  • Electronic Shelf Label (ESL) Access Point (AP): refactored event dispatcher to follow the Observer pattern.

  • Electronic Shelf Label (ESL) Access Point (AP): improved ping performance.

Added in 11.0.0#

The "Log" component now enables the compiler to optimize out filtered out (or masked out) loggings. If a project uses any related API (app_log_filter_threshold_enable, app_log_filter_threshold_set, app_log_filter_mask_enable, app_log_filter_mask_set), turn on the "Enable runtime configuration" setting in the Log configuration.

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#

Fixed in 11.0.1#

ID Issue Description GitHub / Salesforce Reference (if any) Affected Software Variants, Hardware, Modes, Host Interfaces
1589062 ESL: image transfer fails if ESL Tag NVM Image storage is used instead of ESL Tag RAM Image. None All; generic software issue
1566100 ESL AP: fixed a rare ESL AP script crash triggered by unsuccessful EAD decryption. None NCP; generic software issue
1581223 Corrupted BGAPI events on NCP-host running on EFR32. None NCP; generic software issue
1569678 Unvalidated input in Bluetooth secure NCP-host app leads to integer underflow. None NCP; generic software issue

Fixed in 11.0.0#

ID Issue Description GitHub / Salesforce Reference (if any) Affected Software Variants, Hardware, Modes, Host Interfaces
1557180 ESL AP: PAwR default timing parameters have been changed to avoid ESL tags losing sync during network deployment. None All; generic software issue

Chip Enablement#

Added in 11.0.1#

None.

Added in 11.0.0#

Chip Family OPNs / Boards / OPN Combinations Supported Software Variants (if applicable) Supported Modes Supported Host Interfaces
xGM270S Board: BRD2715A, BRD4356A Standard SoC, NCP, RCP N/A

Application Example Changes#

New Examples | Modified Examples | Removed Examples | Deprecated Examples

New Examples#

None.

Modified Examples#

Modified in 11.0.1#

Example Name Changes Supported Software Variants if applicable Supported Modes Supported OPNs / Boards / OPN Combinations Supported Host Interfaces

All NCP-host examples

 Added dynamic log filtering to NCP-host examples using app_log_cli. Standard NCP All supported. UART

Modified in 11.0.0#

Example Name Changes Supported Software Variants if applicable Supported Modes Supported OPNs / Boards / OPN Combinations Supported Host Interfaces

All NCP-host examples
  • Listed in Studio Launcher when virtual host part is selected as target device.
  • Projects and their components are defined using SLC metadata.
 Standard NCP External Hosts:
  • Windows (WIN32)
  • Linux (LINUX_32, LINUX_64)
  • MacOS (MACOS)
 UART

bt_rcp example

 This example requires flow-control. Standard RCP Radio boards with flow control pins routed out supported only. UART

bt_rcp_cpc example

 Security is enabled by default in the bt_rcp_cpc sample application. Standard RCP All supported. UART

Removed Examples#

Removed in 11.0.1#

None.

Removed in 11.0.0#

Removed Example Name

Was Deprecated?

Note

NCP-host positioning GUI example

Yes

NCP-host daemon example

No

Functionality covered by adding ncp_sec component to bt_host_empty example.

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
1543819 The automated upgrade is not possible for bt_cs_ncp and bt_cs_soc_initiator examples. None Upgrade from 2025.6.x has to be carried out manually. The recommended way to upgrade your project is to create a new project from sisdk-2025.12.x and migrate your changes (e.g. application logic) on top of that. All
1565117 IAR toolchain is not supported by Solution Examples None None SoC
1566100 ESL sporadic crash after EAD decryption error None None All
1568416 ESL Access point (AP) "exclusive mode" does not filter the ESL tags in some cases None None All