Our newest embedded software platform, the Simplicity Software Development Kit (SDK), is designed specifically for our Series 2 and upcoming Series 3 devices. The Simplicity SDK is a significant advancement in IoT development, providing our customers with a cohesive development environment for wireless innovation. It enables wireless developers to utilize advanced features and capabilities with the most recent Silicon Labs IoT devices.
Meanwhile, our Gecko Software Development Kit (GSDK) will continue to be available for users of our Series 0 and Series 1 devices.
The Gecko SDK will continue to support all Series 0 and 1 devices with no change to the long-term support, maintenance, quality, and responsiveness provided under our software policy.The new SDK will branch from Gecko SDK and begin to offer new features that help developers take advantage of the advanced capabilities of our Series 2 and 3 products.
This decision aligns with customer feedback, reflecting our commitment to elevate quality, ensure stability, and enhance performance for an exceptional user experience across our software SDKs.
Which SDK Do I Need?
Separate SDKs for Series 0 & 1 and Series 2 & 3 Starting in Q2 2024.
Have a question about which Series you're using. Learn more using our Series Directory.
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Simplicity SDK
-
Gecko SDK
Simplicity SDK Release Notes (2024.6.2)
Latest Release - Q3/2024 (September 2024)
Platform Version 5.0.1.0
- Removed support for Series 0/1
- Support for EFR32xG26, EFR32xG22E and EFR32xG24 devices
- Peripherals
- New API names introduced for low-level drivers (with compatibility layer for old names)
- Services
- Memory Manager, APIs to manage embedded dynamic memory allocations
- Clock Manager, for clock tree initialization
- Event System, for inter-process communication
- Interrupt manager, APIs to manage embedded interrupts
- APIs for accessing value of tokens added to Token Manager
- CPC
- Small improvement and bug fixes
- RAIL
- Added support for collision detection feature on the EFR32xG25 parts
- Added support for additional Coex TX and RX metrics events to RAIL coexistence utility
- Updated some RAIL APIs to better prepare for future API changes while retaining backwards compile-time compatibility
- Other Components
- Compilers upgraded (to GCC 12.2.1 and IAR 9.40.1)
| Release | Date | Release Notes |
|---|---|---|
| 2024 | 2024/07 | Version 5.0.1.0  |
| 2024/06 | Version 5.0.0.0 |
Bluetooth LE Version 8.2.0.0
- Bluetooth
- Targeted quality improvements and bug fixes
- Targeted quality improvements and bug fixes
- Multiprotocol
- Targeted quality improvements and bug fixes
- Targeted quality improvements and bug fixes
| Release | Date | Release Notes |
|---|---|---|
| 2024 | 2024/09 | Version 8.2.0.0 |
| 2024/07 | Version 8.1.0.0 |
|
| 2024/06 | Version 8.0.0.0 |
Bluetooth Location Services Version 8.2.0.0
- Targeted quality improvements and bug fixes
| Release | Date | Release Notes |
|---|---|---|
| 2024 | 2024/09 | Version 8.2.0.0 |
| 2024/07 | Version 8.1.0.0 |
|
| 2024/06 | Version 8.0.0.0 |
Bluetooth Mesh Version 7.0.2.0
- Targeted quality improvements and bug fixes
| Release | Date | Release Notes |
|---|---|---|
| 2024 | 2024/09 | Version 7.0.2.0 |
| 2024/07 | Version 7.0.1.0 |
|
| 2024/06 | Version 7.0.0.0 |
Bluetooth Mesh ADK Version 7.0.2.0
- Targeted quality improvements and bug fixes
| Release | Date | Release Notes |
|---|---|---|
| 2024 | 2024/09 | Version 7.0.2.0 |
| 2024/07 | Version 7.0.1.0 |
|
| 2024/06 | Version 7.0.0.0 |
OpenThread Version 2.5.2.0
- OpenThread
- Targeted quality improvements and bug fixes
- Targeted quality improvements and bug fixes
- Multiprotocol
- Targeted quality improvements and bug fixes
- Targeted quality improvements and bug fixes
| Release | Date | Release Notes |
|---|---|---|
| 2024 | 2024/09 | Version 2.5.2.0 |
| 2024/07 | Version 2.5.1.0 |
|
| 2024/06 | Version 2.5.0.0 |
Proprietary Flex Version 3.8.2.0
- Rail Apps and Library
- Targeted quality improvements and bug fixes
- Targeted quality improvements and bug fixes
- Connect Apps and Stack
- Targeted quality improvements and bug fixes
- Targeted quality improvements and bug fixes
| Release | Date | Release Notes |
|---|---|---|
| 2024 | 2024/09 | Version 3.8.2.0 |
| 2024/07 | Version 3.8.1.0 |
|
| 2024/06 | Version 3.8.0.0 |
USB Device Version 1.3.1.0
- Underlying platform changes only
| Release | Date | Release Notes |
|---|---|---|
| 2024 | 2024/07 | Version 1.3.1.0 |
| 2024/06 | Version 1.3.0.0 |
Wi-SUN Version 2.2.0.0
- Wi-SUN Stack
- Targeted quality improvements and bug fixes
- Targeted quality improvements and bug fixes
- Wi-SUN Applications
- Targeted quality improvements and bug fixes
- Targeted quality improvements and bug fixes
| Release | Date | Release Notes |
|---|---|---|
| 2024 | 2024/09 | Version 2.2.0.0 |
| 2024/07 | Version 2.1.0.0 |
|
| 2024/06 | Version 2.0.0.0 |
Zigbee EmberZNet Version 8.0.2.0
- Zigbee
- Targeted quality improvements and bug fixes
- Targeted quality improvements and bug fixes
- Multiprotocol
- Targeted quality improvements and bug fixes
- Targeted quality improvements and bug fixes
| Release | Date | Release Notes |
|---|---|---|
| 2024 | 2024/09 | Version 8.0.2.0 |
| 2024/07 | Version 8.0.1.0 |
|
| 2024/06 | Version 8.0.0.0 |
Z-Wave and Z-Wave Long Range 800 Version 7.22.2
- Self-certified according to the approved 2024A Specification test suite
- User Credential Command Class implementation is adapted based on the state of the Z-Wave Specification at the time of the 7.22.2 GA release, which may change until the 2024-B1 Z-Wave Specification release
- 7.22.0 GA is officially certified according to the approved 2023B Specification test suite and can be selected on Z-Wave Alliance Certification Portal for End Device product certification
| Release | Date | Release Notes |
|---|---|---|
| 2024 | 2024/09 | Version 7.22.2.0 |
| 2024/07 | Version 7.22.1.0 |
|
| 2024/06 | Version 7.22.0.0 |
Gecko SDK Release Notes (4.4.5.0)
Latest Release - Q4/2024 (October 2024)
Gecko Platform Version 4.4.5.0
- Targeted quality improvements and bug fixes
| Release | Date | Release Notes |
|---|---|---|
| 2024 | 2024/10 | Version 4.4.5.0 |
| 2024/08 | Version 4.4.4.0 |
|
| 2024/07 | Version 4.2.6.0 |
|
| 2024/05 | Version 4.4.3.0 |
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| 2024/04 | Version 4.4.2.0 |
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| 2024/03 | Version 4.3.3.0 |
|
| 2024/02 | Version 4.4.1.0 |
|
| 2024/01 | Version 4.2.5.0 |
|
| 2023 | 2023/12 | Version 4.4.0.0 |
| 2023/10 | Version 4.3.2.0 |
|
| 2023/08 | Version 4.2.4.0 |
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| 2023/07 | Version 4.3.1.0 |
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| 2023/06 | Version 4.1.5.0 |
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| 2023/06 | Version 4.3.0.0 |
|
| 2023/05 | Version 4.2.3.0 |
|
| 2023/03 | Version 4.2.2.0 |
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| 2023/02 | Version 4.2.1.0 |
|
| 2023/01 | Version 4.1.4.0 |
32-bit MCU Version 6.6.5.0
- Underlying platform changes only
| Release | Date | Release Notes |
|---|---|---|
| 2024 | 2024/10 | Version 6.6.5.0 |
| 2024/08 | Version 6.6.4.0 |
|
| 2024/07 | Version 6.4.6.0 |
|
| 2024/05 | Version 6.6.3.0 |
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| 2024/04 | Version 6.6.2.0 |
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| 2024/03 | Version 6.5.3.0 |
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| 2024/02 | Version 6.6.1.0 |
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| 2024/01 | Version 6.4.5.0 |
|
| 2023 | 2023/12 | Version 6.6.0.0 |
| 2023/10 | Version 6.5.2.0 |
|
| 2023/10 | Version 6.1.9.0 |
|
| 2023/08 | Version 6.4.4.0 |
|
| 2023/07 | Version 6.5.1.0 |
|
| 2023/06 | Version 6.3.5.0 |
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| 2023/06 | Version 6.5.0.0 |
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| 2023/05 | Version 6.4.3.0 |
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| 2023/03 | Version 6.4.2.0 |
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| 2023/02 | Version 6.4.1.0 |
|
| 2023/01 | Version 6.3.4.0 |
Bluetooth Version 7.2.0.0
- Bluetooth
- New Scanner Option
- Large Accept List Size
- HCI Event filtering
- Multiprotocol
- Targeted quality improvements and bug fixes
- Targeted quality improvements and bug fixes
| Release | Date | Release Notes |
|---|---|---|
| 2024 | 2024/10 | Version 7.2.0.0 |
| 2024/08 | Version 7.1.2.0 |
|
| 2024/07 | Version 5.1.4.1 |
|
| 2024/05 | Version 7.1.1.0 |
|
| 2024/04 | Version 7.1.0.0 |
|
| 2024/03 | Version 6.3.0.0 |
|
| 2024/02 | Version 7.0.1.0 |
|
| 2024/01 | Version 5.1.4.0 |
|
| 2023 | 2023/12 | Version 7.0.0.0 |
| 2023/10 | Version 6.2.0.0 |
|
| 2023/08 | Version 5.1.3.0 |
|
| 2023/07 | Version 6.1.0.0 |
|
| 2023/06 | Version 4.2.3.0 |
|
| 2023/06 | Version 6.0.0.0 |
|
| 2023/05 | Version 5.1.2.0 |
|
| 2023/03 | Version 5.1.1.0 |
|
| 2023/02 | Version 5.1.0.0 |
|
| 2023/01 | Version 4.2.2.0 |
Bluetooth Location Services Version 7.2.0.0
- Underlying platform changes only
| Release | Date | Release Notes |
|---|---|---|
| 2024 | 2024/10 | Version 7.2.0.0 |
| 2024/08 | Version 7.1.2.0 |
|
| 2024/07 | Version 5.1.4.1 |
|
| 2024/05 | Version 7.1.1.0 |
|
| 2024/04 | Version 7.1.0.0 |
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| 2024/03 | Version 6.3.0.0 |
|
| 2024/02 | Version 7.0.1.0 |
|
| 2024/01 | Version 5.1.4.0 |
|
| 2023 | 2023/12 | Version 7.0.0.0 |
| 2023/10 | Version 6.2.0.0 |
|
| 2023/08 | Version 5.1.3.0 |
|
| 2023/07 | Version 6.1.0.0 |
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| 2023/06 | Version 4.2.3.0 |
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| 2023/06 | Version 6.0.0.0 |
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| 2023/05 | Version 5.1.2.0 |
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| 2023/02 | Version 5.1.1.0 |
|
| 2023/01 | Version 4.2.2.0 |
Bluetooth Mesh Version 6.1.3.0
- Targeted quality improvements and bug fixes
| Release | Date | Release Notes |
|---|---|---|
| 2024 | 2024/10 | Version 6.1.3.0 |
| 2024/08 | Version 6.1.2.0 |
|
| 2024/07 | Version 4.2.4.0 |
|
| 2024/05 | Version 6.1.1.0 |
|
| 2024/04 | Version 6.1.0.0 |
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| 2024/03 | Version 5.0.3.0 |
|
| 2024/02 | Version 6.0.1.0 |
|
| 2024/01 | Version 4.2.3.0 |
|
| 2023 | 2023/12 | Version 6.0.0.0 |
| 2023/10 | Version 5.0.2.0 |
|
| 2023/08 | Version 4.2.2.0 |
|
| 2023/07 | Version 5.0.1.0 |
|
| 2023/06 | Version 3.0.5.0 |
|
| 2023/06 | Version 5.0.0.0 |
|
| 2023/05 | Version 4.2.1.0 |
|
| 2023/03 | Version 4.2.0.0 |
Bluetooth Mesh ADK Version 6.0.5.0
- Added support for Networked Lighting Control (NLC) profiles. Mobile Application can detect the presence of a NLC based device and automatically provision and configure it.
| Release | Date | Release Notes |
|---|---|---|
| 2024 | 2024/10 | Version 6.0.5.0 |
| 2024/08 | Version 6.0.4.0 |
|
| 2024/07 | Version 4.2.4.0 |
|
| 2024/05 | Version 6.0.3.0 |
|
| 2024/04 | Version 6.0.2.0 |
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| 2024/03 | Version 5.0.3.0 |
|
| 2024/02 | Version 6.0.1.0 |
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| 2024/01 | Version 4.2.3.0 |
|
| 2023 | 2023/12 | Version 6.0.0.0 |
| 2023/08 | Version 4.2.2.0 |
|
| 2023/07 | Version 5.0.1.0 |
|
| 2023/06 | Version 3.0.5.0 |
|
| 2023/06 | Version 5.0.0.0 |
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| 2023/05 | Version 4.2.1.0 |
|
| 2023/03 | Version 4.2.0.0 |
OpenThread Version 2.4.5.0
- OpenThread
- Includes conformance and support for Thread 1.4 Credential sharing, Network diagnostics features, and improvements made for border router Public Internet Connectivity. Support for 1.4 commercial TCAT (Thread over Authenticated TLS) feature is present but not tested
- Includes conformance and support for Thread 1.4 Credential sharing, Network diagnostics features, and improvements made for border router Public Internet Connectivity. Support for 1.4 commercial TCAT (Thread over Authenticated TLS) feature is present but not tested
- Multiprotocol
- Targeted quality improvements and bug fixes
- Targeted quality improvements and bug fixes
| Release | Date | Release Notes |
|---|---|---|
| 2024 | 2024/10 | Version 2.4.5.0 |
| 2024/08 | Version 2.4.4.0 |
|
| 2024/07 | Version 2.2.6.0 |
|
| 2024/05 | Version 2.4.3.0 |
|
| 2024/04 | Version 2.4.2.0 |
|
| 2024/03 | Version 2.3.3.0 |
|
| 2024/02 | Version 2.4.1.0 |
|
| 2024/01 | Version 2.2.5.0 |
|
| 2023 | 2023/12 | Version 2.4.0.0 |
| 2023/10 | Version 2.3.2.0 |
|
| 2023/08 | Version 2.2.4.0 |
|
| 2023/07 | Version 2.3.1.0 |
|
| 2023/06 | Version 2.1.5.0 |
|
| 2023/06 | Version 2.3.0.0 |
|
| 2023/05 | Version 2.2.3.0 |
|
| 2023/03 | Version 2.2.2.0 |
|
| 2023/02 | Version 2.2.1.0 |
|
| 2023/01 | Version 2.1.4.0 |
Proprietary Flex Version 3.7.5.0
- Targeted quality improvements and bug fixes
| Release | Date | Release Notes |
|---|---|---|
| 2024 | 2024/10 | Version 3.7.5.0 |
| 2024/08 | Version 3.7.4.0 |
|
| 2024/07 | Version 3.5.6.0 |
|
| 2024/05 | Version 3.7.3.0 |
|
| 2024/04 | Version 3.7.2.0 |
|
| 2024/03 | Version 3.6.3.0 |
|
| 2024/02 | Version 3.7.1.0 |
|
| 2024/01 | Version 3.5.5.0 |
|
| 2023 | 2023/12 | Version 3.7.0.0 |
| 2023/10 | Version 3.6.2.0 |
|
| 2023/08 | Version 3.5.4.0 |
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| 2023/07 | Version 3.6.1.0 |
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| 2023/06 | Version 3.4.5.0 |
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| 2023/06 | Version 3.6.0.0 |
|
| 2023/05 | Version 3.5.3.0 |
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| 2023/03 | Version 3.5.2.0 |
|
| 2023/02 | Version 3.5.1.0 |
|
| 2023/01 | Version 3.4.4.0 |
USB Device Stack 1.2.3.0
- Targeted quality improvements and bug fixes
| Release | Date | Release Notes |
|---|---|---|
| 2024 | 2024/08 | Version 1.2.3.0 |
| 2024/05 | Version 1.2.2.0 |
|
| 2024/04 | Version 1.2.1.0 |
|
| 2023 | 2023/12 | Version 1.2.0.0 |
| 2023/06 | Version 1.1.2.0 |
|
| 2023/02 | Version 1.1.1.0 |
Wi-SUN Version 1.10.3.0
- Targeted quality improvements and bug fixes
| Release | Date | Release Notes |
|---|---|---|
| 2024 | 2024/10 | Version 1.10.3.0 |
| 2024/08 | Version 1.10.2.0 |
|
| 2024/05 | Version 1.10.1.0 |
|
| 2024/04 | Version 1.10.0.0 |
|
| 2024/03 | Version 1.7.2.0 |
|
| 2024/01 | Version 1.9.0.0 |
|
| 2023 | 2023/12 | Version 1.8.0.0 |
| 2023/10 | Version 1.7.1.0 |
|
| 2023/07 | Version 1.7.0.0 |
|
| 2023/06 | Version 1.6.0.0 |
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| 2023/05 | Version 1.5.2.0 |
|
| 2023/03 | Version 1.5.1.0 |
|
| 2023/02 | Version 1.5.0.0 |
Zigbee EmberZNet Version 7.4.5.0
- Zigbee
- Targeted quality improvements and bug fixes
- Targeted quality improvements and bug fixes
- Multiprotocol
- Targeted quality improvements and bug fixes
- Targeted quality improvements and bug fixes
| Release | Date | Release Notes |
|---|---|---|
| 2024 | 2024/10 | Version 7.4.5.0 |
| 2024/08 | Version 7.4.4.0 |
|
| 2024/07 | Version 7.2.6.0 |
|
| 2024/05 | Version 7.4.3.0 |
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| 2024/04 | Version 7.4.2.0 |
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| 2024/03 | Version 7.3.3.0 |
|
| 2024/02 | Version 7.4.1.0 |
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| 2024/01 | Version 7.2.5.0 |
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| 2023 | 2023/12 | Version 7.4.0.0 |
| 2023/10 | Version 7.3.2.0 |
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| 2023/08 | Version 7.2.4.0 |
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| 2023/07 | Version 7.3.1.0 |
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| 2023/06 | Version 7.1.5.0 |
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| 2023/06 | Version 7.3.0.0 |
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| 2023/05 | Version 7.2.3.0 |
|
| 2023/03 | Version 7.2.2.0 |
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| 2023/02 | Version 7.2.1.0 |
|
| 2023/01 | Version 7.1.4.0 |
Z-Wave and Z-Wave Long Range 700/800 SDK 7.21.5.0
- Fixed an issue introduced in 7.21.4 impacting the effectiveness of a wake-up beam targeted at a FLiRS device
| Release | Date | Release Notes |
|---|---|---|
| 2024 | 2024/10 | Version 7.21.5.0 |
| 2024/08 | Version 7.21.4.0 |
|
| 2024/05 | Version 7.21.3.0 |
|
| 2024/04 | Version 7.21.2.0 |
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| 2024/03 | Version 7.20.3.0 |
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| 2024/02 | Version 7.21.1.0 |
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| 2024/01 | Version 7.19.5.0 |
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| 2023 | 2023/12 | Version 7.21.0.0 |
| 2023/10 | Version 7.20.2.0 |
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| 2023/08 | Version 7.19.4.0 |
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| 2023/07 | Version 7.20.1.0 |
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| 2023/06 | Version 7.18.6.0 < |
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| 2023/06 | Version 7.20.0.0 |
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| 2023/05 | Version 7.19.3.0 |
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| 2023/03 | Version 7.19.2.0 |
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| 2023/02 | Version 7.19.1.0 |
|
| 2023/01 | Version 7.18.4.0 |
Wireless SDKs
The following components are available as part of Simplicity Studio.
Explore the portfolio of Wireless IoT protocol SDKs
32-bit Microcontroller SDK
This software package provides all of the drivers and services needed for a successful 32-bit MCU project.
Bluetooth Low Energy SDK
Develop Bluetooth Low Energy wireless connectivity solutions for IoT devices and applications.
Bluetooth Mesh SDK
Develop scalable Bluetooth mesh wireless connectivity solutions for IoT devices and applications.
Flex SDK - Connect Stack
Connect is the IEEE 802.15.4 wireless networking stack. It allows you to develop proprietary connectivity applications for low-power devices quickly.
Flex SDK - RAIL
RAIL, the Radio Abstraction Interface Layer, gives you all the latest RF technologies without sacrificing the investment you’ve made in your wireless protocol.
Thread SDK - OpenThread
Here are the Thread SDK and development tools for creating IP-based 802.15.4 wireless mesh solutions.
Wi-SUN SDK
Industry-leading software stack and development tools for Wi-SUN IoT devices and applications.
Zigbee SDK - EmberZNet
Get the complete Zigbee protocol stack and all elements required for developing reliable mesh networking applications.
Z-Wave SDK
Develop Z-Wave Plus compliant IoT products quickly and cost-effectively with a complete SDK.