RCP 917 - Bluetooth LE Release Version 2.15.0 (April 8, 2026) - Release Notes#

Wi-Fi 6 + BLE Linux Driver(RCP)

The SiWT917 RCP Driver provides feature-rich Bluetooth 5 connectivity with multi-connection capabilities, advanced advertising extensions, and power optimization for diverse IoT applications.

Click here for SiWT917 releases.

Release Summary#

Key Features | Bug Fixes | Chip Enablement

Key Features#

None

Bug Fixes#

  • Fixed a BLE disconnection issue that occurred when the DUT attempted to connect to an access point while configured for the China (SRRC) region only.

  • Fixed an issue where the output transmit power was higher in end-to-end mode compared to PER test mode across all temperatures.

  • Fixed an issue where the central device was unable to establish a BLE Advertising Extension (AE) connection when operating with LE Coded PHY rates.

  • Fixed a SiWx917Y BLE test power mismatch where SRRC ('cn') region output was 2 dB higher than 'us'.

  • Functional fixes for RSSI accuracy.

Chip Enablement#

  • OPN : SIWT917Y100XGAXA, Board: SiW917Y-RB4357C

Key Features#

New Features | Enhancements | Removed Features | Deprecated Features

Note: See Features Supported for a list of supported features.

New Features#

None

Enhancements#

None

Removed Features#

None

Deprecated Features#

None

Bug Fixes#

ID Issue Description
1427321 Fixed a BLE disconnection issue that occurred when the DUT attempted to connect to an access point while configured for the China (SRRC) region only.
1567221 Fixed an issue where the output transmit power was higher in end-to-end mode compared to PER test mode across all temperatures.
1618999 Fixed an issue where the central device was unable to establish a BLE Advertising Extension (AE) connection when operating with LE Coded PHY rates.
1515072 Fixed an issue in SiWx917Y BLE testing where the 'cn' (SRRC) region showed 2 dB higher output power compared to the 'us' region..
1388472 Fixed issues with BLE RSSI accuracy across various temperatures.

Chip Enablement#

Chip Family OPNs / Boards / OPN Combinations Supported Modes Supported Host Interfaces
SiWx91x
  • OPN: SIWT917Y100XGAXA
  • Boards: SiW917Y-RB4357C
  • For External Hosts SI-EB8045B , SI-EB8045A + BRD8046A
  • RCP
 SDIO

Known Issues#

  • BLE disconnections are expected with the RC clock in power save.

  • BLE connected power consumption has increased following the transmit power alignment fix. The increase is approximately 8% at the 200ms connection interval and approximately 29% at the 1.28 sec connection interval.

Limitations and Unsupported Features#

  • For BLE, if the connection is established with a small connection interval (less than 15 ms), simultaneous roles (i.e., Central + Scanning and Peripheral + Advertising) are not supported.

  • BLE maximum two concurrent connections are supported(1 Central connection and 1 Peripheral connection) or (2 Central connections) or (2 Peripheral connections).

  • The advertising Extension feature is not supported.

  • Isochronous channels feature is not supported.

  • The connection subrating feature is not supported.

  • LE power controller feature is not supported.

  • The EATT feature is not supported.

  • Periodic Advertising with response(PAwR) feature is not supported.

  • BLE Audio is not supported.

  • The dynamic adjustment of TX power while extended advertising is active is not supported.

  • Peripheral Latency feature is not supported.

  • Restricted the option for users to modify BLE Gain tables for the SiWT917Y module.