RS9116 Platform SDK Version 2.12.1 (August 29 2025) - Release Notes#

Wi-Fi 4 RS9116x Series

The RS9116W Platform software development kit (SDK/SAPI) provides platform features on Silicon Labs SiWx91x microcontrollers, including peripherals, drivers, and services.

Click here for earlier releases.

Release Summary#

Key Features | API Changes | Bug Fixes | Chip Enablement

Key Features#

None

API Changes#

None

Bug Fixes#

  • Fixed compilation errors if UART interface is enabled.

Chip Enablement#

None

Key Features#

New Features | Enhancements | Removed Features | Deprecated Features

Note: See Feature Matrix for a list of any applicable APIs, examples, software variants, modes, hardware, and host interfaces for each feature.

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#

ID Issue Description GitHub / Salesforce Reference (if any) Affected Chip Revision, Hardware, Host Interfaces
815828 Compilation errors if UART is enabled in SAPI version 2.5.0.26 None
  • Hardware boards: All
  • Chip revision: All
  • Host interface: UART, SPI

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

Known Issues and Limitations#

ID Issue or Limitation Description GitHub / Salesforce Reference (if any) Workaround (if any) Affected Chip Revision, Hardware, Host Interfaces
1502405 Chip Revision 1.3 does not support low-power mode optimization using the EXT_FEAT_LOW_POWER_MODE bit setting. Enabling this bit may cause the system to hang. None None
  • Hardware boards: All
  • Chip revision: 1.3
  • Host interface: UART, SPI
1502403 When coexistence (coex) is configured, the RS9116 may enter powersave mode before the configured monitor interval for inactivity. None None
  • Hardware boards: All
  • Chip revision: All
  • Host interface: UART, SPI
1502453 The FTP client application does not work with EFx32/STM32 when an RTOS is used. None None
  • Hardware boards: All
  • Chip revision: All
  • Host interface: UART, SPI
1502452 The HTTP OTA update application does not work with EFR32 and EFM32 when an RTOS is used. None None
  • Hardware boards: All
  • Chip revision: All
  • Host interface: UART, SPI
1502446 Firmware update does not work for the EFM32 platform. None None
  • Hardware boards: All
  • Chip revision: All
  • Host interface: UART, SPI
1502450 SAPI driver with UART host interface is only supported on bare metal. None None
  • Hardware boards: All
  • Chip revision: All
  • Host interface: UART, SPI
1502400 Powersave without RAM retention does not work when the SPI interface is used. None None
  • Hardware boards: All
  • Chip revision: All
  • Host interface: UART, SPI
1077954 MQTT receive may encounter failures in STA + AP concurrent mode. None None
  • Hardware boards: All
  • Chip revision: All
  • Host interface: UART, SPI
1221686 On the EFM platform, standby-associated listen interval current consumption is higher than expected. None None
  • Hardware boards: All
  • Chip revision: All
  • Host interface: UART, SPI