WiSeConnect 3 - SiWx91x Bluetooth LE SDK Version 3.5.1 (July 23 2025) - Release Notes#
Wi-Fi 6 + BLE (WiSeConnect 3) SDK Version 3.5.1
Simplicity SDK Version 2025.6.1
The SiWx91x Bluetooth LE software development kit (SDK) provides feature-rich Bluetooth 5 connectivity with multi-connection capabilities, advanced advertising extensions, and power optimization for diverse IoT applications.
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Release Summary#
Key Features | API Changes | Bug Fixes | Chip Enablement
Key Features#
Added in 3.5.1#
None
Added in 3.5.0#
Support for concurrent 8 BLE peripherals + 2 BLE central devices
API Changes#
Added in 3.5.1#
None
Added in 3.5.0#
None
Bug Fixes#
Fixed in 3.5.1#
None
Fixed in 3.5.0#
None
Chip Enablement#
Added in 3.5.1#
None
Added in 3.5.0#
None
Key Features#
New Features | Enhancements | Removed Features | Deprecated Features
Note: See Feature Matrix for a list of any appliable APIs, examples, software variants, modes, hardware, and host interfaces applicable for each feature.
New Features#
Added in 3.5.1#
None
Added in 3.5.0#
None
Enhancements#
Added in 3.5.1#
None
Added in 3.5.0#
None
Removed Features#
Removed in 3.5.1#
None
Removed in 3.5.0#
None
Deprecated Features#
Deprecated in 3.5.1#
None
Deprecated in 3.5.0#
None
API Changes#
New APIs | Modified APIs | Removed APIs | Deprecated APIs
New APIs#
Added in 3.5.1#
None
Added in 3.5.0#
None
Modified APIs#
Modified in 3.5.1#
None
Modified in 3.5.0#
None
Removed APIs#
Removed in 3.5.1#
None
Removed in 3.5.0#
None
Deprecated APIs#
Deprecated in 3.5.1#
None
Deprecated in 3.5.0#
None
Bug Fixes#
Note: See the Feature Matrix section for a list of all hardware parts that work with the WiSeConnect 3 SDK.
Fixed in 3.5.1#
None
Fixed in 3.5.0#
None
Chip Enablement#
Added in 3.5.1#
None
Added in 3.5.0#
None
Application Example Changes#
New Examples | Modified Examples | Removed Examples | Deprecated Examples
Note: See the Feature Matrix section for a list of all hardware parts that work with the WiSeConnect 3 SDK.
New Examples#
Added in 3.5.1#
None
Added in 3.5.0#
None
Modified Examples#
Modified in 3.5.1#
None
Modified in 3.5.0#
None
Removed Examples#
Removed in 3.5.1#
None
Removed in 3.5.0#
None
Deprecated Examples#
Deprecated in 3.5.1#
None
Deprecated in 3.5.0#
None
Known Issues and Limitations#
Note: See the Feature Matrix section for a list of all hardware parts that work with the WiSeConnect 3 SDK.
Added in 3.5.1#
Same as 3.5.0
Added in 3.5.0#
| ID | Issue or Limitation Description | GitHub / Salesforce Reference (if any) | Workaround (if any) | Affected Software Variants, Hardware, Modes, Host Interfaces |
|---|---|---|---|---|
| 1458618 |
The ble_data_length application example does not work with 121x and 141x PSRAM OPNs.
|
None | None |
|
| 1369767 |
BLE power save API returns a host timeout error (-1) while performing a BLE legacy scan with a 5 ms scan interval and a 2.5 ms scan window.
|
None | None |
|
| 1454483 |
The BLE power save API returns a host timeout error (-1) while performing a BLE legacy scan with a 10.24-second scan interval and a 5-second scan window.
|
None | None |
|
| 1439892 | SiWx917 hangs when the SRRC region is set. This does not occur with the SiWG917Y module. | None | None |
|
| 1447917 |
SiWx917 simultaneously transmits both an ATT_WRITE_RSP and an ATT_ERROR_RSP in response to a single incoming ATT_WRITE_REQ packet from a mobile device, particularly when writing variable-length data.
|
None | None |
|
| 1455159 | Instability with conurrent 8 BLE peripheral connections when SMP is disabled on an encrypted connectivity firmware (network processor) image. | None | None |
|
| 1463443 |
The WLAN power save API fails to disable power saving in the ble_secureconnection_psram example application.
|
None | None |
|
| 1454294 | SiWx917 hangs when running BLE notifications with 10 simultaneous BLE connections using coded PHY rates (125 Kbps and 500 Kbps) on an encrypted connectivity firmware (network processor) image. | None | None |
|
| 1453632 |
The ble_multiconnection_gatt_test and wlan_ble_unified_coex example applications exhibit various functional issues in dense environments:
|
None | None |
|
| 1465175 | SiWx917 hangs when power save is enabled during BLE transmit/receive notifications with the HP chain. | None | None |
|
| 1461758 |
Security and encryption do not work as expected in the ble_iop example application with certain Android devices.
|
None | None |
|
| 1463804 | SiWx917 hangs after 11 hours when running BLE transmit and receive notifications with 10 simultaneous BLE connections using an un-encrypted connectivity firmware (network processor) image. | None | None |
|
| N/A | BLE Secondary latency value is only valid up to 32. | None | None |
|
| N/A | Maximum supported AE data length is 200 bytes. | None | None |
|
| N/A |
Supports only two ADV_EXT sets.
|
None | None |
|
| N/A | Supports only two simultaneous BLE connections (either two peripheral, two central, or one central and one peripheral) when Advertising Extensions are enabled. | None | None |
|