Silicon Labs Bluetooth® LE SDK 9.1.1.0 GA
Simplicity SDK Suite 2024.12.3
August 6, 2025
Silicon Labs is a leading vendor in Bluetooth hardware and software technologies, used in products such as sports and fitness, consumer electronics, beacons, and smart home applications. The core SDK is an advanced Bluetooth 5.4-compliant stack that provides all of the core functionality along with multiple API to simplify development. The core functionality offers both standalone mode, allowing a developer to create and run their application directly on the SoC, or in NCP mode allowing for the use of an external host MCU.
These release notes cover SDK version(s):
- 9.1.1.0 GA released August 6, 2025
- 9.1.0.0 GA released April 1, 2025
- 9.0.1.0 GA released February 5, 2025
- 9.0.0.0 GA released December 16, 2024
KEY FEATURES
Bluetooth
- GA release of Periodic Advertisement BGAPI event
- BT LE Connection Subrating
- Accept List Based Auto-connect
- BT Atlanta (v6.0) LL and Host Qualification
- Channel Sounding sparse channel map support
- Channel Sounding antenna switching support
- CBAP - CPMS integration
Multiprotocol
- ZigbeeD and OTBR support on OpenWRT - GA
- DMP BLE + CMP ZB & Matter/OT with Concurrent Listening on MG26 for SoC - GA
- 802.15.4 Unified radio scheduler priority component
- Debian packaging support for MP host applications - Alpha
Compatibility and Use Notices
For information about security updates and notices, see the Security chapter of the Platform Release Notes installed with this SDK or on the TECH DOCS tab on https://www.silabs.com/developers/bluetooth-low-energy. Silicon Labs also strongly recommends that you subscribe to Security Advisories for up-to-date information. For instructions as well as notes on using Secure Vault features, or if you are new to the Silicon Labs Bluetooth SDK, see Using This Release.
Compatible Compilers:
- IAR Embedded Workbench for ARM (IAR-EWARM) version 9.40.1.
- Using wine to build with the IARBuild.exe command line utility or IAR Embedded Workbench GUI on macOS or Linux could result in incorrect files being used due to collisions in wine's hashing algorithm for generating short file names. Customers on macOS or Linux are advised not to build with IAR outside of Simplicity Studio. Customers who do should carefully verify that the correct files are being used.
- GCC (The GNU Compiler Collection) version 12.2.1, provided with Simplicity Studio.
1 New Items
1.1 New Features
Added in release 9.1.0.0
- GATT Client for ATT MTU Exchange Only: Added component bluetooth_feature_gatt_client_att_mtu_request_only. This component provides a minimal GATT Client to automatically initiate an ATT MTU exchange procedure when the GATT connection is open. This component does not provide the GATT Client API. Use the GATT Server API sl_bt_gatt_server_set_max_mtu to set the maximum size of ATT MTU in the BLE Host Stack.
- Components for Specific Connection Roles: Added new components bluetooth_feature_connection_role_central and bluetooth_feature_connection_role_peripheral. These components provide support for a specific connection role. When an application includes bluetooth_feature_connection, the application should also include one or both of the role-specific components based on the application's needs. If the application includes only bluetooth_feature_connection, both connection roles will be supported for backwards compatibility.
- Better Code Optimization in Bluetooth Security Manager: The Bluetooth security manager now automatically drops the central or peripheral state machine if either the bluetooth_feature_connection_role_central or the bluetooth_feature_connection_role_peripheral component, respectively, is not included, in the application.
Added in release 9.0.0.0
- TX power higher than 10 dBm in low power mode: Using TX power higher than 10 dBm in low power mode is supported in NCP and SoC modes. The power limits in low power mode can be configured using sl_bt_system_linklayer_configure() with key sl_bt_system_linklayer_config_key_low_power_mode_power_limit.
- New scanner option: Added a new scanner option, SL_BT_SCANNER_IGNORE_BONDING, for use with sl_bt_scanner_set_parameters_and_filter command. If the application does not need the bonding information in advertisement reports, it can set this scanner option to avoid unnecessary searching of the bondings.
- New custom address option: Added a new option, SL_BT_CONFIG_SET_CUSTOM_ADDRESS_FROM_NVM3, for configuring whether the stack should use a custom address stored in the defined key in Bluetooth region of NVM3 as the device identity address. By default, this option is enabled.
- Event System IPC support for Bluetooth events: The new optional component, bluetooth_event_system_ipc, provides support for getting Bluetooth events via the Event System mechanism in an application that uses an RTOS.
- Connection Subrating: The new optional component, bluetooth_feature_connection_subrate, provides Bluetooth Connection Subrating feature. The feature is provided in experimental quality in this release.
- LTO support in host stack libraries: Selected host stack GCC libraries are built with LTO options (-flto, -ffat-lto-objects). This enables better code size optimization if the application uses LTO.
- HCI Event Filtering: Allows defining custom event filters for HCI event processing. The filter callback is called before the event is sent to the host stack. This can be used to limit unnecessary traffic over an HCI connection.
- Extended RTOS support: Added RTOS variant of multiple existing example applications.
1.2 New APIs
Added in release 9.0.0.0
sl_bt_gap_get_identity_address()command: Get the Bluetooth identity address used by the device.sl_bt_gatt_read_variable_length_characteristic_values()command: Read multiple variable-length characteristic values from a remote GATT server.sl_bt_gatt_server_read_attribute_properties()command: Read the properties of an attribute from local GATT database.sl_bt_gattdb_get_attribute_state()command: Get the attribute state from local GATT database when using the dynamic GATT database feature.sl_bt_gatt_server_find_primary_service()command: Find primary services with UUID from local GATT database.sl_bt_connection_set_default_acceptable_subrate()command: Set the default acceptable parameters for subrating requests.sl_bt_connection_request_subrate()command: Request a change to the subrating factor and other parameters.sl_bt_evt_connection_subrate_changedevent: Report the completion of subrating procedure or subrating parameter changes on a connection.sl_bt_evt_connection_request_subrate_failedevent: Report that a subrating procedure failed.sl_bt_evt_periodic_advertiser_statusevent: Report the latest status of periodic advertising on an advertising set.sl_bt_system_linklayer_config_key_set_periodic_advertising_status_report (0x8): New key tosl_bt_system_linklayer_configure()to enable or disable the status report of periodic advertising.
2 Improvements
2.1 Changed Items
Changed in release 9.0.0.0
| ID # | Description |
|---|---|
| 1233899 | Selected Bluetooth host stack libraries are compiled with LTO options (-flto -ffat-lto-objects) for allowing better dead code elimination in applications. |
| 1234000 | Certificate fields have been updated for Certificate Based Authentication and Pairing. Database added for issued certificates. |
| 1298645 | Changed returned error codes to use the actual values from NVM3 when accessing it using BGAPI. |
| 1318468 | Certificate Based Authentication and Pairing is now supported on xG22 devices. |
| 1321901 | Object tracking mode 'stationary object tracking' can now be selected in bt_cs_host. |
| 1329672 | Released the CBAP library source. CBAP refactoring enabled. Connection handling improved. |
| 1332939 | A bonding confirmation event is sent even when the connection has already been encrypted and pairing request is received from the central device. |
| 1334523 | BLE host stack can now operate without the presence of NVM3. To drop NVM3 from a Bluetooth application, the application must not use bluetooth_feature_builtin_bonding_database, bluetooth_feature_nvm, or bluetooth_feature_sm components. |
| 1324517 | Added link layer configuration flag to report number of transmitted packets in direct test modes. |
2.2 Changed APIs
Changed in release 9.0.0.0
None.
2.3 Intended Behavior
Changed in release 9.0.0.0
None.
3 Fixed Issues
Fixed in release 9.1.1.0
| ID # | Description |
|---|---|
| 1311673 | Fixed a rare issue in connection establishment on secondary channel where device might get stuck. |
| 1429396 | Fixed potential memory corruption issues that could occur in the ESL library during timeouts for various reasons. |
| 1458635 | The bonding on a new connection in the host stack would fail if the local device used privacy as the central role and scanning had been enabled before initiating the new connection. This has been fixed. If you are unable to update to the latest version, the workaround is to disable and enable the privacy again before initiating a new connection creation. |
Fixed in release 9.1.0.0
| ID # | Description |
|---|---|
| 1404920 | Fixed an issue where a macro to reset the terminal colors was defined but not used. _app_log_reset_color was defined but not used in app_log.h This fix adds it to the end of macros that use _app_log_print_color. |
| 1405476 | Fixed an issue that prevented the NCP from initializing properly when BGAPI message encryption is enabled. |
| 1417581 | Fixed init time issue when one advertising handle is used by both legacy and extended advertisements. This caused a race condition which stopped the advertiser prematurely. |
Fixed in release 9.0.1.0
| ID # | Description |
|---|---|
| 1381647 | In Channel Sounding (CS) multi-connection use case, where the reflector is running CS procedures with more than one initiator, the reflector sometimes selected parameters that would lead to procedures overlap. This has been fixed. |
| 1355908 | Periodic Advertisement did not work properly in dynamic multiprotocol with Open Thread. This has been fixed. |
| 1383315 | Unused bluetooth_feature_extended_scanner component was removed from ESL AP NCP. |
| 1388519 | Fixed a regression in the built-in battery level measurement of the ESL Tag that was preventing the correct value from being measured. |
| 1393811 | Fixed a regression in the QR code generator for the ESL demo that was introduced with Pillow v11.x Python module update. |
Fixed in release 9.0.0.0
| ID # | Description |
|---|---|
| 845506 | The adaptivity of AFH can be disabled or enabled with command sl_bt_system_linklayer_configure() and key sl_bt_system_linklayer_config_key_set_channelmap_flags. |
| 1082103, 1141041, 1212061 | Using TX power higher than 10 dBm in low power mode is supported in NCP and SoC modes. The power limits in low power mode can be configured using sl_bt_system_linklayer_configure() key sl_bt_system_linklayer_config_key_low_power_mode_power_limit. |
| 1284611 | Clarified in the API documentation that starting a DTM transmitter or receiver test while other Bluetooth activities are active will either result in an error response or will cause functionality issues. The API documentation now suggests that the application should make sure other Bluetooth activities are stopped when performing a test. |
| 1328923 | Fixed an issue in dynamic GATT database feature that, after adding a new descriptor to a GATT characteristic that has been enabled to be visible to remote GATT clients, the remote GATT client cannot see the new descriptor. |
| 1335919 | Make bluetooth_feature_advertiser component configurable on Simplicity Studio component browser GUI. |
| 1349058 | Fixed an issue which allowed security properties to downgrade during re-pairing. Now the security properties must match or exceed ones used during previous pairing. |
| 1356037 | sl_bt_nvm_save(), sl_bt_nvm_load(), and sl_bt_nvm_erase() now properly validate that a specified NVM3 key is in the range assigned for user data. The key range for user data stored in the Bluetooth region of NVM3 is extended to 0x4000 - 0x5fff. |
| 1371005 | Fixed an issue in the Bluetooth LE linklayer, where an advertising device that is sending out connectable extended advertisements replies to an AUX_CONN_REQ with an invalid AUX_CONN_RSP. This issue happened when the user set a random address to the extended advertising set only. |
| 1362681 | Fixed PAwR subevent_start. It was not incrementing correctly. |
| 1336266 | Fixed an issue with sl_bt_advertiser_set_timing() not working properly with higher than 16000 (10sec). Interval_max. |
| 1330263 | Fixed an issue in the Bluetooth LE link-layer that caused the PAwR advertiser to stop accepting subevent data setting from the host. |
4 Known Issues in the Current Release
Issues in bold were added since the previous release. If you have missed a release, recent release notes are available on https://www.silabs.com/developers/bluetooth-low-energy in the Tech Docs tab.
| ID # | Description | Workaround |
|---|---|---|
| 361592 | The sync_data event does not report TX power. | None |
| 368403 | If setting CTE interval to 1, a CTE request should be sent in every connection interval. But it is sent only in every second connection interval. | None |
| 641122 | The Bluetooth stack component does not provide a configuration for RF antenna path. | This is an issue specifically for BGM210P. One workaround is to manually update the configuration in sl_bluetooth_config.h in text edit mode. |
| 682198 | The Bluetooth stack has an interoperability issue on the 2M PHY with a Windows PC. | No workaround exists. For application development and testing, the disconnection can be avoided by disabling 2M PHY with sl_bt_connection_set_preferred_phy() or sl_bt_connection_set_default_preferred_phy(). |
| 756253 | The RSSI value on a Bluetooth connection returned by the Bluetooth API is incorrect on EFR32M21 devices. It is about 8~10 dBm higher than the actual value, according to a measurement. | Install the "RAIL Utility, RSSI" component in the application project. This component provides a default RSSI offset for the chip that is applied at the RAIL level and can help to achieve more accurate RSSI measurements. |
| 1031031 | Changing the configuration in the bt_aoa_host_locator application results in the application crashing. | None |
| 1334418, 1335263 | Channel sounding minor jitter issue when transmitting RTT sync packets on the initiators side. This might be visible when doing channel sounding to some other vendor devices. | None |
| 1373310 | RTOS Priorities are not set correctly in SoC/NCP case if not using dynamic multiprotocol. This might cause radio priorities to be blocked by less important priorities. | Radio priorities need to set radio priorities in the application software. |
| 1383864 | Scan event may contain additional garbage bytes in a noisy environment, where lots of BLE devices advertise at the same time. | None |
| 1397074 | In the Channel Sounding use case, if the unsupported Free-Running mode is selected in the configuration header file, some connections will be closed by the application and re-established. | Set the maximum procedure count to 0. |
| 1399177 | In case of Channel Sounding multi-connection scenario, where the reflector is connected to more than one initiator, some connections may close due to operation timeout. | None |
| 1491950 | Occasionally, a byte is dropped on UART in case of Series 2 devices running Channel Sounding examples. | Set the Peripheral Clock Divider in the project to 2. Do this by setting the value of 'SL_CLOCK_MANAGER_PCLK_DIVIDER' to 'CMU_SYSCLKCTRL_PCLKPRESC_DIV2'. |
5 Deprecated Items
Deprecated in release 9.0.0.0
Overriding the HFXO CTUNE with a value in the NVM3 Bluetooth region is deprecated. By default, CTUNE override using NVM3 Bluetooth region is disabled. Enable it with the SL_BT_CONFIG_SET_CTUNE_FROM_NVM3 configuration. Since the Simplicity SDK 2024.12.1 release, the alternative of CTUNE override is to use the platform component clock_manager_oscillator_calibration_override. This platform component supports both the HFXO and LFXO CTUNE overrides.
6 Removed Items
Removed from release 9.0.1.0
| ID # | Description |
|---|---|
| 1382948 | Bluetooth RTOS examples are no longer supported on xG22 devices. |
Removed from release 9.0.0.0
sl_bt_connection_get_rssisl_bt_rtos_has_event_waitingsl_bt_rtos_event_waitsl_bt_rtos_get_eventsl_bt_rtos_set_event_handled- Parameter 'txsize' of event sl_bt_evt_connection_parameters
7 Multiprotocol Gateway and RCP
7.1 New Items
Added in release 9.1.0.0
The zigbee_throughput plugin start command now includes an optional uint8_t argument "plugin throughput start 0" which will not clear the stack counters before a throughput test begins. This is intended for testing purposes. If no additional arugment is included and/or not 0, the current behavior remains the same and will clear the device counters when a throughput test begins.
Added in release 9.0.0.0
- Enabled GA SoC support for BLE DMP with Zigbee + Openthread CMP with concurrent listening on xG26 parts.
- Debian alpha support has been added for zigbeed, OTBR and Z3Gateway applications. Zigbeed and OTBR are provided in DEB package format for the chosen reference platform (Raspberry PI 4) as well. See Running Zigbee, OpenThread, and Bluetooth Concurrently on a Linux Host with a Multiprotocol Co-Processor, for details.
- Added Zigbeed support for Tizen-0.1-13.1 for arm32 and aarch64 as well as Android 12 for aarch64. More information on Zigbeed can be found at docs.silabs.com.
- Added the new "802.15.4 Unified radio scheduler priority" component. This component is used to configure the radio priorities of a 15.4 stack. The component also requires the new "radio_priority_configurator" component. This component allows projects to use the Radio Priority Configurator tool in Simplicity Studio to configure the radio priority levels of the stacks that require it.
7.2 Improvements
Changed in release 9.1.0.0
The Zigbee-NCP + Open Thread-RCP (UART & SPI) samples, as well as the Zigbee-NCP + BLE-NCP (UART & SPI) samples, are now only allowed for generation on parts with sufficient RAM (>=96kB).
Changed in release 9.0.1.0
The Zigbee BLE - DynamicMultiprotocolLightSed sample project can now be built for boards with only one LED if the LED1 component is excluded from the project.
This revision has the following improvements for multi-protocol applications when, for example, running Zigbee or Open Thread for the custom use-case of running one protocol at a time:
- The
sl_zigbee_af_zll_unset_factory_new()API has been added to allow applications to unset a Zigbee node from the default factory new state when necessary. - A callback,
sl_rail_mux_invalid_rx_channel_detected_cb(), has been added to Zigbee+OT applications. This callback notifies the application when there has been an attempted RX on two different channels while concurrent listening is not enabled. The application can then implement its own logic to handle this situation.
Changed in release 9.0.0.0
- Application note Running Zigbee, Open Thread, and Bluetooth Concurrently on a Linux Host with a Multiprotocol Co-Processor (AN1333) has been moved to docs.silabs.com.
- OpenWRT support is now GA quality. OpenWRT support has been added for zigbeed, OTBR and Z3Gateway applications. Zigbeed and OTBR are provided in IPK package format for the reference platform (Raspberry PI 4) as well. See Running Zigbee, OpenThread, and Bluetooth Concurrently on a Linux Host with a Multiprotocol Co-Processor, for details.
7.3 Fixed Issues
Fixed in 9.1.1.0
| ID # | Description |
|---|---|
| 1375724 | Fixed a race condition on the multipan RCP that resulted in a transmit complete message not being returned to the host, causing a 5 second pause in further transmissions prior to recovering. (Other ref: 1454196, 1454198, 1454200) |
Fixed in release 9.1.0.0
| ID # | Description |
|---|---|
| 1392015 | SL_OPENTHREAD_ENABLE_SERIAL_TASK is now set to 0 by default to reduce the task memory size which is not required for RCP applications. (Other ref: 1424440) |
| 1393057 | Fixed an issue where the Zigbee-NCP + Open Thread-RCP (UART & SPI) samples, as well as the Zigbee-NCP + BLE-NCP (UART & SPI) samples, were allowed for generation on parts with insufficient RAM. |
| 1399687 | Fixed an issue where the Zigbee-BLE DMP Light app may fail to go to EM2 sleep. |
| 1420018 | Fixed an issue where a CPC message from an RTOS-enabled RCP to host could be waiting in a send queue until something woke up the serial task. |
Fixed in release 9.0.1.0
| ID # | Description |
|---|---|
| 1363050 | Zigbee stack initialization no longer activates the radio (or RCP for host stacks) prior to stack APIs being called by the application. This prevents unwanted multi-PAN operation on Channel 11 (the default channel) when using a multi-PAN-capable RCP configuration. (Other ref: 1390724) |
| 1378298 | Fixed an issue that caused a crash when entering "keys print" on an DMP Light app with LTO enabled. |
| 1381165 | Fixed an issue on Zigbee-NCP + OT-RCP, when disabling PTA would have caused NCP/RCP reset. |
Fixed in release 9.0.0.0
| ID # | Description |
|---|---|
| 1275378 | Fixed an issue where calling sl_802154_radio_set_scheduler_priorities() prior to sli_mac_lower_mac_init() could result in a crash. |
| 1300848 | Fixed an issue where Z3Gateway in OpenWRT environment couldn't start EZSP communication caused by mismatching termios control characters running on OpenWRT and other environments. |
| 1332330 | Fixed an issue where a 15.4+BLE RCP operating in an environment with heavy network traffic could occasionally encounter a race condition that would leave it unable to send messages up to CPCd until rebooting the device. |
| 1337101 | Incomplete 15.4 transmit operations (Tx waiting for an ack, Tx an ack in response to a message, etc) are no longer prematurely considered as failed upon radio interruption due to DMP. This allows said operation to be given a chance to be rescheduled after the interruption or permanently failed by RAIL (scheduler status error events). |
| 1337228 | In Zigbeed the halCommonGetInt32uMillisecondTick() tick API is now updated to use MONOTONIC clock, so that it does not get affected by the NTP in a host system. |
| 1337295 | The DMP CLI command "plugin ble gap print-connections" will now print "No BLE connections" if the connection table is empty, instead of providing no response. |
| 1346785 | Fixed a race condition which could cause concurrent listening to be disabled on the 802.15.4 RCP when both protocols were transmitting simultaneously. |
| 1346849 | Adding the rail_mux components to a project will now cause it to automatically build with the associated stack library variants. |
| 1365665 | Fixed an issue where the host would report receiving a packet with an invalid checksum on end-point 12. |
7.4 Known Issues in the Current Release
| ID # | Description | Workaround |
|---|---|---|
| 937562 | Bluetoothctl 'advertise on' command fails with rcp-uart-802154-blehci app on Raspberry Pi OS 11. | Use btmgmt app instead of bluetoothctl. |
| 1074205 | The CMP RCP does not support two networks on the same PAN id. | Use different PAN ids for each network. Support is planned in a future release. |
| 1122723 | In a busy environment, the CLI may become unresponsive in the z3-light_ot-ftd_soc app. | No known workaround. |
| 1209958 | The ZB/OT/BLE RCP using concurrent listening on MG24 and MG21 may stop working in endurance test (lasts ~2 hours) with constant and concurrent traffic on all 3 stacks. | Disable concurrent listening in use cases involving constant and concurrent traffic across all 3 protocols. |
| 1221299 | Mfglib RSSI readings differ between RCP and NCP. | Will be addressed in a future release. |
| 1356052 | Coex-enabled RCP may still occasionally transmit TX ACK after losing the Grant even when Acking is disabled and TX Abort is enabled. | Will be addressed in a future release. |
| 1385486 | TX from RCP may infrequently happen without the request after turning on the non-802.15.4 compliant MAC Holdoff coex option. | Will be addressed in a future release. |
7.5 Deprecated Items
The "Multiprotocol Container" which is currently available on DockerHub (siliconlabsinc/multiprotocol) will be deprecated in an upcoming release. The container will no longer be updated and able to be pulled from DockerHub. The Debian-based packages for cpcd, zigbeed, and ot-br-posix, along with natively generated and compiled projects, will replace the functionality lost with the removal of the container.
7.6 Removed Items
Removed in release 9.0.1.0
sl_sec_man_init()has been removed, since it no longer serves a purpose.
Removed in release 9.0.0.0
None.
8 Using This Release
This release contains the following:
- Silicon Labs Bluetooth stack library
- Bluetooth sample applications
For more information about the Bluetooth SDK see https://docs.silabs.com/bluetooth/latest/. If you are new to Bluetooth see UG103.14: Bluetooth LE Fundamentals.
8.1 Installation and Use
The Bluetooth SDK is provided as part of the Simplicity SDK, the suite of Silicon Labs SDKs. To quickly get started with the Simplicity SDK, install Simplicity Studio 5, which will set up your development environment and walk you through GSDK installation. Simplicity Studio 5 includes everything needed for IoT product development with Silicon Labs devices, including a resource and project launcher, software configuration tools, full IDE with GNU toolchain, and analysis tools. Installation instructions are provided in the online Simplicity Studio 5 User's Guide.
Alternatively, Simplicity SDK may be installed manually by downloading or cloning the latest from GitHub. See https://github.com/SiliconLabs/simplicity_sdk for more information.
Simplicity Studio installs the Simplicity by default in:
- (Windows): C:\Users\<NAME>\SimplicityStudio\SDKs\simplicity_sdk
- (MacOS): /Users/<NAME>/SimplicityStudio/SDKs/simplicity_sdk
Documentation specific to the SDK version is installed with the SDK. Additional information can often be found in the knowledge base articles (KBAs). API references and other information about this and earlier releases is available on https://docs.silabs.com/.
8.2 Security Information
Secure Vault Integration
When deployed to Secure Vault High devices, sensitive keys such as the Long Term Key (LTK) are protected using the Secure Vault Key Management functionality. The table below shows the protected keys and their storage protection characteristics.
| Wrapped Key | Exportable / Non-Exportable | Notes |
|---|---|---|
| Remote Long Term Key (LTK) | Non-Exportable | |
| Local Long Term Key (legacy only) | Non-Exportable | |
| Remote Identity Resolving Key (IRK) | Exportable | Must be Exportable for future compatibility reasons |
| Local Identity Resolving Key | Exportable | Must be Exportable because the key is shared with other devices. |
Wrapped keys that are marked as "Non-Exportable" can be used but cannot be viewed or shared at runtime.
Wrapped keys that are marked as "Exportable" can be used or shared at runtime but remain encrypted while stored in flash.
For more information on Secure Vault Key Management functionality, see AN1271: Secure Key Storage.
8.3 Support
Development Kit customers are eligible for training and technical support. Use the Silicon Labs Bluetooth LE web page to obtain information about all Silicon Labs Bluetooth products and services, and to sign up for product support.
You can contact Silicon Laboratories support at http://www.silabs.com/support.
8.4 SDK Release and Maintenance Policy
For details, see SDK Release and Maintenance Policy.
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