RS9116 Platform SDK Version 2.13.1 (April 2, 2026) - Release Notes#

Wi-Fi 4 RS9116x Series

The RS9116 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#

None

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#

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

Known Issues and Limitations#

ID Issue or Limitation Description GitHub / Salesforce Reference (if any) Workaround (if any) Affected Chip Revision, Hardware, Host Interfaces
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
1557514 USB-CDC enumeration has issue with USB1.1. Although the negotiated maximum packet size is 512 bytes, only 64‑byte operation is successful. None None
  • Hardware boards: All
  • Chip revision: All
  • Host interface: USB