Overview
Silicon Labs Wi-SUN SDK is the industry-leading software stack and development tools for Wi-SUN application development. FAN certified Wi-SUN stack is based on the open-source implementation from ARM® and is therefore highly optimized for the ARM® Cortex® series based EFR platform from Silicon Labs. This solution provides PHY, MAC and IPv6-6LoWPAN layers up to the application layer and includes a FAN certified Border Router.
Wi-SUN Solution Highlights
Complete solution for end nodes and border routers
FAN certified PHYs, Stack & Border Router Reference
All mandatory and optional data rates including 50 kbps, 100 kps, and 150 kbps
Regional support for North America, Brazil, Europe, and India
Wi-SUN Border Router Demo
Wi-SUN Network Analyzer
Software Features
Simplicity Studio IDE and WSTK + Radio boards
CoAP Library & Wi-SUN Sample Applications
Standards Based - CoAP, TCP, UDP, IPv6, 6LoWPAN, RPL
Tool Chain – GCC and IAR
FreeRTOS and Micrium
POSIX like socket interface
Downloads
Download and Install Simplicity Studio
Get up and running quickly with Wi-SUN SDKs, precompiled demos, application notes and examples. Use advanced tools including energy profiling and network analysis to optimize your wireless systems. Choose your software package below.
GitHub
Silicon Labs wireless IoT SDKs and code examples are also available for download on GitHub.
VS Code IDE Support
In addition to the Simplicity Studio IDE, we also support VS Code that can be used in companion with all of our unique development tools.
Tech Docs
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Simplicity SDK
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Gecko SDK
Simplicity SDK Release Notes (2025.6.0)
Latest Release - Q2/2025 (June 2025)
Wi-SUN Version 2.6.0.0
- Key Features
- Added Wi-SUN+BLE dynamic multi-protocol (DMP) support
- Added concurrent detection support
- API Changes
- Added sl_wisun_set_preferred_pan() API that sets a FFN preferred PAN. A router will try to roam to its preferred PAN if it is available
- Bug Fixes
- Fixed an issue causing devices to be stuck in join state 3
- Fixed multiple MAC issues causing RCP instabilities
- Chip Enablement
- EFR32FG23 as RCP
| Release | Date | Release Notes |
|---|---|---|
| 2025 | 2025/06 | Version 2.6.0.0  |
| 2025/04 | Version 2.2.1.0 |
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| 2025/04 | Version 2.5.0.0 |
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| 2025/02 | Version 2.4.0.0 |
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| 2024 | 2024/12 | Version 2.3.0.0 |
| 2024/09 | Version 2.2.0.0 |
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| 2024/07 | Version 2.1.0.0 |
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| 2024/06 | Version 2.0.0.0 |
Gecko SDK Release Notes (4.4.6.0)
Latest Release - Q1/2025 (February 2025)
Wi-SUN Version 1.10.4.0
Wi-SUN Stack
- Added support for LFN multicast reception
- Added support for non-standard PHY configurations
- Added support for blocking sockets
Wi-SUN Applications
- Wi-SUN – SoC Network Measurement improvements
- Wi-SUN – SoC (CoAP) Meter and Wi-SUN – SoC (CoAP) Collector improvements
| Release | Date | Release Notes |
|---|---|---|
| 2025 | 2025/02 | Version 1.10.4.0 |
| 2024 | 2024/10 | Version 1.10.3.0 |
| 2024/08 | Version 1.10.2.0 |
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| 2024/05 | Version 1.10.1.0 |
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| 2024/04 | Version 1.10.0.0 |
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| 2024/03 | Version 1.7.2.0 |
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| 2024/01 | Version 1.9.0.0 |
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| 2023 | 2023/12 | Version 1.8.0.0 |
| 2023/10 | Version 1.7.1.0 |
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| 2023/07 | Version 1.7.0.0 |
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| 2023/06 | Version 1.6.0.0 |
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| 2023/05 | Version 1.5.2.0 |
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| 2023/03 | Version 1.5.1.0 |
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| 2023/02 | Version 1.5.0.0 |
Community & Support
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