Simplicity SDK Version 2025.6.3 (February 18, 2026) - Release Notes#
The primary tool for the Silicon Labs IoT software development ecosystem, combining wireless software development kits (SDKs) and platform into a single, integrated package.
Click here for earlier releases on GitHub.
Looking for older release notes? You can still access previous versions for both Simplicity SDK (prior to 2025.6.0) and Gecko SDK here.
Release Summary#
| Release Item | Version | Release Date |
|---|---|---|
Platform |
5.2.3 |
February 18, 2026 |
RAIL Library |
2.19.3 |
February 18, 2026 |
RAIL SDK |
2.19.3 |
February 18, 2026 |
USB |
1.5.1 |
July 21, 2025 |
Wi-Fi 6 + BLE (WiSeConnect 3) |
3.5.3 |
November 24, 2025 |
OpenThread |
2.7.3 |
February 18, 2026 |
Zigbee |
8.2 Revision 3 |
February 18, 2026 |
Bluetooth LE |
10.1.2 |
February 18, 2026 |
Bluetooth Mesh |
9.1.0 |
February 18, 2026 |
Bluetooth Location Services |
10.0.3 |
February 18, 2026 |
Z-Wave |
7.24.3 |
February 18, 2026 |
Wi-SUN |
2.9.2 |
February 18, 2026 |
Silicon Labs Matter |
2.7.0-1.4 |
September 29, 2025 |
Amazon Sidewalk |
2.7.0 |
December 19, 2025 |
Connect |
4.1.3 |
February 18, 2026 |
Machine Learning |
2.1.3 |
February 18, 2026 |
Simplicity Studio |
5.11.2 |
February 18, 2026 |
Simplicity Connect Mobile App |
3.1.2 |
September 24, 2025 |