RCP 917 - Wi-Fi Release Version 2.15.0 (April 8, 2026) - Release Notes#

Wi-Fi 6 + BLE Linux Driver(RCP)

The SiWT917 RCP Driver provides Wi-Fi 6 connectivity in various operating modes, including Station and Software Access Point (SoftAP).

Click here for SiWT917 releases.

Release Summary#

Key Features | Bug Fixes | Chip Enablement

Key Features#

  • Added kernel support till 6.12.

  • Added support for module refresh (external low-power XTAL option support).

Bug Fixes#

  • Fixed delay issue while creating the vap.

  • Fixed beacon and broadcast reception issues in congested environments.

  • Fixed an issue where the module was incorrectly identifying early beacons from the AP, leading to excessive power consumption during long-run tests.

  • Improved Wi-Fi RSSI Accuracy for high attenuation levels.

  • Fixed Beacon reception issues in congested environment.

  • Disabled RF turnoff till the end of packet on air when the packet is dropped.

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#

  • Added support for module refresh (external low-power XTAL option support).

Enhancements#

  • Updated Kernel support till 6.12

Removed Features#

None

Deprecated Features#

None

Bug Fixes#

ID Issue Description
1614239 Fixed delay issue while creating the vap.
1405635 Fixed beacon and broadcast reception issues in congested environments.
1518842 Fixed an issue where the module was incorrectly identifying early beacons from the AP, leading to excessive power consumption during long-run tests.
1435733 Improved Wi-Fi RSSI Accuracy for high attenuation levels.
1310207 Fixed Beacon reception issues in congested environment.
1397227 Disabled RF turnoff till the end of packet on air when the packet is dropped.

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#

  • The set rate cannot be used for setting non-MCS and non-basic rates in kernels above 4.13.16.

  • Tx and Rx Rate information is not being updated in WLAN interface stats reported by the iwconfig tool.

  • Auto Channel Selection in AP with WORLD region will not work.

  • In Concurrent Mode, Wi-Fi performance may be reduced if more than four clients are connected to DUT-AP.

  • Deep sleep is disabled by default. Users can enable it using the default_deep_sleep_enable module_param mentioned in the TRM.

  • TWT device (STA) may not go to sleep in between TWT intervals in case of burst data traffic where data transfer happens over multiple TWT service periods.

  • WoWLAN feature is not supported.

  • In AP mode, performance is expected to degrade with the addition of the number of clients.

  • Hardware Beacon Miss event observed using MBSSID mode.

  • Around 38% of packet loss observed in RF chamber while running UDP-bidirectional traffic.

  • Wi-Fi client receives deauthentication from the access point when trigger TWT with announced mode is enabled.

  • In AP mode, in congested environments where channel occupancy exceeds 85%, connected stations may experience disconnections due to high congestion.

Limitations and Unsupported Features#

  • Broadcast TWT is not supported.

  • AMSDU TX is not supported.

  • Fragmentation is not supported.

  • AMSDUs within AMPDU is not supported.

  • 802.11k is not supported

  • 40 MHz bandwidth is not supported.

  • Low Power mode is not supported.

  • In iTWT mode, downlink data traffic should be limited. Disconnections may be observed if AP fails to send all the buffered data in the next TWT Service Period.

  • The number of Non-Transmitting BSSIDs processed is limited by the beacon length that can be processed by the stack (which is 1024 bytes). Beacons greater than 1024 Bytes in length will not be processed.

  • UL MU-MIMO is not supported.

  • WPA3 AP supports only the H2E algorithm.

  • PMKSA caching is not supported in WPA3 AP mode.

  • Wi-Fi performance may be reduced in dense environments.

  • 802.11j is not supported.

  • Background scan(Scan after DUT-STA connection) and power-save features are not supported for the station mode vap in concurrent mode.

  • In Wi-Fi concurrent mode, Both DUT AP and Testbed AP should be in the same channel. The Channel in the hostapd configuration file needs to be updated manually to the same channel as the Testbed AP.

  • In Wi-Fi concurrent Mode, DUT-STA doesn't reconnect to testbed AP if the testbed AP changes the channel(Only if DUT-AP is up), also DUT-AP stays in the same channel and continues to beacon.

  • WPS mode is not supported.

  • GPIO-based power save is not supported.

  • For SiWT917Y modules, Channels 12, 13 and 14 are not supported in AP mode.

  • For SiWT917Y modules, Gain table update is not supported.

  • For SiWT917Y modules, Country code configuration is not supported in AP mode.

  • Monitor mode is not supported in 802.11ax.