Gecko SDK

The Silicon Labs Gecko SDK (GSDK) is a single integrated package of 32-bit IoT product software development kits (SDKs) and Gecko platform. It is the primary tool for development in the Silicon Labs IoT Software ecosystem. It provides many powerful features to offer a seamless experience which includes ultra-low power consumption, strong network reliability, Industry-leading ability to support a large number of nodes, and abstraction of complex requirements like multiprotocol and pre-certification. The GSDK is covered by one of several different licenses with the default license of Master Software License Agreement (MSLA). Silicon Labs also extends over-the-air (OTA) software and security updates to remotely update the devices, minimize the maintenance cost and improve the end-user product experience.

An archive of all release notes associated with the latest version of the GSDK can be found here.



Gecko SDK Release Notes (4.4.1.0)

Latest Release - Q1/2024  (March 2024)

Gecko Platform Version 4.4.1.0

  • Peripherals
    • New API names introduced for low-level drivers (with compatibility layer for old names)
  • Services
    • APIs for accessing value of tokens added to Token Manager
  • CPC
    • NVM3 module, enabling Host access to Secondary device's non-volatile memory, released at production quality
    • CPC Primary, for use with MCU Hosts, released at Experimental quality
    • Numerous optimizations and performance improvements made
  • Security
    • Mbed TLS upgraded (to version 3.5.0)
  • RAIL
    • Several new features added for EFR32xG25 devices, including a new component for selecting modulations supported by the software modem
    • Support added for several new PHYs, including Sidewalk PHYs on EFR32xG23 and EFR32xG28
  • Other Components
    • Compilers upgraded (to GCC 12.2.1 and IAR 9.40.1) 
Release Date Release Notes
2024 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 
2023/07 Version 4.3.1.0 
2023/06 Version 4.1.5.0 
2023/06 Version 4.3.0.0 
2023/05 Version 4.2.3.0 
2023/03 Version 4.2.2.0 
2023/02 Version 4.2.1.0 
2023/01 Version 4.1.4.0 


32-bit MCU Version 6.6.1.0

  • Added support for new OPNs
  • Upgrade compilers to GCC 12.2.1 and IAR 9.40.1 
Release Date Release Notes
2024 2024/03 Version 6.5.3.0 
2024/02 Version 6.6.1.0 
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 
2023/06 Version 6.5.0.0 
2023/05 Version 6.4.3.0 
2023/03 Version 6.4.2.0 
2023/02 Version 6.4.1.0 
2023/01 Version 6.3.4.0 


Bluetooth Version 7.0.1.0

  • Bluetooth
    • New feature component bluetooth_feature_connection_analyzer provides the functionality to capture and analyze the RSSI of transmissions on a Bluetooth connection 
  • 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
2024 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 7.0.1.0

  • Underlying code changes only
Release Date Release Notes
2024 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 
2023/02 Version 5.1.1.0 
2023/01 Version 4.2.2.0 


Bluetooth Mesh Version 6.0.1.0

  • Qualified implementation of Mesh 1.1
  • Added Network Lighting Control (NLC) profiles 
Release Date Release Notes
2024 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 6.0.1.0

  • 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 2024/02 Version 6.0.1.0 
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 
2023/05 Version 4.2.1.0 
2023/03 Version 4.2.0.0 


OpenThread Version 2.4.1.0

  • 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
2024 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 3.7.1.0

  • RAIL Apps and Library:
    • Connect OFDM support for some applications
    • EFR32xG28 Proprietary 2.4 GHz 15.4 Standard PHY support
    • Added hardware support: MG24 QFN40, EFRBG22-E, EFR32xG28 Explorer Kit 
  • Connect Apps and Stack:
    • SUN-FSK and SUN-OFDM support
    • Long message reception and transmission 
Release Date Release Notes
2024 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 
2023/07 Version 3.6.1.0 
2023/06 Version 3.4.5.0 
2023/06 Version 3.6.0.0 
2023/05 Version 3.5.3.0 
2023/03 Version 3.5.2.0 
2023/02 Version 3.5.1.0 
2023/01 Version 3.4.4.0 


USB Device Stack 1.2.0.0

  • Targeted quality imrovements and bug fixes
Release Date Release Notes
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 1.9.0.0

  • 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
2024 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 
2023/05 Version 1.5.2.0 
2023/03 Version 1.5.1.0 
2023/02 Version 1.5.0.0 


Zigbee EmberZNet Version 7.4.1.0

  • Zigbee
    • Zigbee R23 compliance
    • Zigbee Smart Energy 1.4a compliance - production
    • Zigbee GP 1.1.2 compliance - Alpha
    • MG27 support - production
    • Improved support for Secure Vault parts
    • Sleepy support on NCP SPI (non-CPC) applications – Alpha 
  • Multiprotocol
    • Concurrent Listening support (RCP) – MG21 and MG24
    • Concurrent Multiprotocol (CMP) Zigbee NCP + OpenThread RCP – production
    • Dynamic Multiprotocol Bluetooth + Concurrent Multiprotocol (CMP) Zigbee and OpenThread support on SoC 
Release Date Release Notes
2024 2024/03 Version 7.3.3.0 
2024/02 Version 7.4.1.0 
2024/01 Version 7.2.5.0 
2023 2023/12 Version 7.4.0.0 
2023/10 Version 7.3.2.0 
2023/08 Version 7.2.4.0 
2023/07 Version 7.3.1.0 
2023/06 Version 7.1.5.0 
2023/06 Version 7.3.0.0 
2023/05 Version 7.2.3.0 
2023/03 Version 7.2.2.0 
2023/02 Version 7.2.1.0 
2023/01 Version 7.1.4.0 


Z-Wave and Z-Wave Long Range 700/800 SDK 7.21.1.0

  • Various quality improvements
  • Improve the power manager interface with the Z-Wave applocation layer

Wireless SDKs

The following components are available as part of Simplicity Studio.

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