Overview
Silicon Labs is a founding board member of the Thread Group with numerous successful customer deployments of mesh networking solutions based on 802.15.4 and Thread. Registered customers of the kits can access the Thread SDK and development tools through Simplicity Studio.
Thread SDK Features and Benefits
| Features | Benefits | |
|---|---|---|
| Thread 1.3.0 | Provides low-power, IPv6-based wireless communication between devices for home and commercial building applications | |
| Matter | Easy, reliable, and secure application layer to connect all IoT devices and networks. | |
| OpenThread Border Router | Connects a Thread network to other IP-based networks such as Wi-Fi or Ethernet | |
| Dynamic Multiprotocol | Enable Thread and Bluetooth functionality on a single chip | |
| Concurrent Multiprotocol | Enable Thread and Zigbee functionality on a single chip |
Thread SDK Specification Support
Thread Specification Support
Thread Specification Support
Thread 1.3.0
IEEE 802.15.4 MAC/PHY 2015
2.4 GHz Worldwide
Sample Applications
CLI FTD
CLI MTD
RCP
DMP
SLEEPY-DEMO
Devices
Dynamic Multiprotocol with BLE
Concurrent Multiprotocol with Zigbee
Low-power sleepy devices
Non-Volatile Memory with Flash Wear Leveling
Gateway
RCP
SPI - 1 Mbps
UART (RTS/CTS) - 115200 bps
Spinel NCP Protocol
GitHub
OpenThread
OpenThread Border Router
Enablement
RTOS
FreeRTOS
Manufacturing Library
Command Line Interface
Power Management
Bootloader
Antenna Diversity
Wi-Fi Coexistence
Security
Secure Vault™
IEEE 802.15.4 MAC Security
J-PAKE Commissioning
PSA Crypto API Support
Development Tools
Simplicity Studio IDE
Network Analyzer
Energy Profiler
Packet Trace Interface
Simplicity Commander
Supported Toolchains
GCC (The GNU Compiler Collection)
version 10.3-2010.10
Mobile Apps
Thread 1.1 Commissioning App for Android
Downloads
Download and Install Simplicity Studio
Get up and running quickly with 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 (2025.6.1)
Latest Release - Q2/2025 (July 2025)
View Latest Versions of All SiSDK Release Notes Here
OpenThread Release Notes
| Release | Date | Release Notes |
|---|---|---|
| 2025 | Latest Version | View Latst Version  |
| 2025/08 | Version 2.6.3.0  |
|
| 2025/04 | Version 2.5.3.0 |
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| 2025/04 | Version 2.6.2.0 |
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| 2025/02 | Version 2.6.1.0 |
|
| 2024 | 2024/12 | Version 2.6.0.0 |
| 2024/09 | Version 2.5.2.0 |
|
| 2024/07 | Version 2.5.1.0 |
|
| 2024/06 | Version 2.5.0.0 |
Gecko SDK Release Notes (4.4.6.0)
Latest Release - Q1/2025 (February 2025)
OpenThread Version 2.4.6.0
- OpenThread
- Thread 1.3.0 certification compliance with Thread Test Harness v59.0 for SoC and Host-RCP architectures
- Thread 1.3.1 feature support - Experimental
- Crash Handler support
- TrustZone Evaluation support
- MR21 support for OpenThread RCP – Production
- Multiprotocol
- Concurrent Listening support (RCP) – MG21 and MG24
- Concurrent Multiprotocol (CMP) Zigbee NCP + OpenThread RCP – production quality
- Dynamic Multiprotocol Bluetooth + Concurrent Multiprotocol (CMP) Zigbee and OpenThread support on SoC
| Release | Date | Release Notes |
|---|---|---|
| 2025 | 2025/02 | Version 2.4.6.0 |
| 2025/01 | Version 2.2.7.0 |
|
| 2024 | 2024/10 | Version 2.4.5.0 |
| 2024/08 | Version 2.4.4.0 |
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| 2024/07 | Version 2.2.6.0 |
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| 2024/05 | Version 2.4.3.0 |
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| 2024/04 | Version 2.4.2.0 |
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| 2024/03 | Version 2.3.3.0 |
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| 2024/02 | Version 2.4.1.0 |
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| 2024/01 | Version 2.2.5.0 |
Community & Support
Knowledge Base Articles
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User Forums
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