Simplicity Studio Version 4
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Download the Full Online Installer Version of Simplicity Studio 4
System Requirements
Operating Systems
| Operating System | Tested Version |
| Windows | Windows 10 (64-bit) |
| macOS | 10.14 Mojave |
| Linux | Ubuntu 18.04 LTS |
Hardware
| Hardware Component | Item |
| CPU | 1 GHz or better |
| Memory | 1 GB RAM minimum, 8 GB recommended for Wireless Protocol development |
| Disk Space | 600 MB disk space for minimum FFD installation 7 GB for Wireless Dynamic Protocol support |
Gecko SDK Release Notes (4.5.0.0)
Latest Release - Q4/2025 (October 2025)
Gecko Platform Version 4.4.7.0
- Peripherals
- New API names introduced for low-level drivers (with compatibility layer for old names)
- 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
- 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 |
|---|---|---|
| 2025 | 2025/10 | Version 4.4.7.0  |
| 2025/02 | Version 4.4.6.0 |
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| 2025/01 | Version 4.2.7.0 |
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| 2024 | 2024/10 | Version 4.4.5.0 |
| 2024/08 | Version 4.4.4.0 |
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| 2024/07 | Version 4.2.6.0 |
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| 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 |
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| 2024/02 | Version 4.4.1.0 |
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| 2024/01 | Version 4.2.5.0 |
8-bit 8051 MCU Version 4.1.7.0
- VCPXpress 2.0 release
- Replaced compiler_defs.h with si_toolchain.h
32-bit MCU Version 6.6.7.0
- Added support for new OPNs
- Upgrade compilers to GCC 12.2.1 and IAR 9.40.1
| Release | Date | Release Notes |
|---|---|---|
| 2025 | 2025/10 | Version 6.6.7.0 |
| 2025/02 | Version 6.6.6.0 |
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| 2025/01 | Version 6.4.7.0 |
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| 2024 | 2024/10 | Version 6.6.5.0 |
| 2024/08 | Version 6.6.4.0 |
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| 2024/07 | Version 6.4.6.0 |
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| 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 |
Bluetooth Version 7.4.0.0
- 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 |
|---|---|---|
| 2025 | 2025/10 | Version 7.4.0.0 |
| 2025/02 | Version 7.3.0.0 |
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| 2025/01 | Version 5.2.0.0 |
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| 2024 | 2024/10 | Version 7.2.0.0 |
| 2024/08 | Version 7.1.2.0 |
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| 2024/07 | Version 5.1.4.1 |
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| 2024/05 | Version 7.1.1.0 |
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| 2024/04 | Version 7.1.0.0 |
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| 2024/03 | Version 6.3.0.0 |
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| 2024/02 | Version 7.0.1.0 |
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| 2024/01 | Version 5.1.4.0 |
Bluetooth Location Services Version 7.4.0.0
- Underlying code changes only
| Release | Date | Release Notes |
|---|---|---|
| 2025 | 2025/10 | Version 7.4.0.0 |
| 2025/02 | Version 7.3.0.0 |
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| 2025/01 | Version 5.2.0.0 |
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| 2024 | 2024/10 | Version 7.2.0.0 |
| 2024/08 | Version 7.1.2.0 |
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| 2024/07 | Version 5.1.4.1 |
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| 2024/05 | Version 7.1.1.0 |
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| 2024/04 | Version 7.1.0.0 |
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| 2024/03 | Version 6.3.0.0 |
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| 2024/02 | Version 7.0.1.0 |
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| 2024/01 | Version 5.1.4.0 |
Bluetooth Mesh Version 6.1.5.0
- Qualified implementation of Mesh 1.1
- Added Network Lighting Control (NLC) profiles
| Release | Date | Release Notes |
|---|---|---|
| 2025 | 2025/10 | Version 6.1.5.0 |
| 2025/02 | Version 6.1.4.0 |
|
| 2024 | 2024/10 | Version 6.1.3.0 |
| 2024/08 | Version 6.1.2.0 |
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| 2024/07 | Version 4.2.4.0 |
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| 2024/05 | Version 6.1.1.0 |
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| 2024/04 | Version 6.1.0.0 |
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| 2024/03 | Version 5.0.3.0 |
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| 2024/02 | Version 6.0.1.0 |
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| 2024/01 | Version 4.2.3.0 |
Bluetooth Mesh ADK Version 6.0.7.0
- 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 |
|---|---|---|
| 2025 | 2025/10 | Version 6.0.7.0 |
| 2025/02 | Version 6.0.6.0 |
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| 2025/01 | Version 4.2.5.0 |
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| 2024 | 2024/10 | Version 6.0.5.0 |
| 2024/08 | Version 6.0.4.0 |
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| 2024/07 | Version 4.2.4.0 |
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| 2024/05 | Version 6.0.3.0 |
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| 2024/04 | Version 6.0.2.0 |
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| 2024/03 | Version 5.0.3.0 |
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| 2024/02 | Version 6.0.1.0 |
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| 2024/01 | Version 4.2.3.0 |
OpenThread Version 2.4.7.0
- 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 | 2025/10 | Version 2.4.7.0 |
| 2025/02 | Version 2.4.6.0 |
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| 2025/01 | Version 2.2.7.0 |
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| 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 |
Proprietary Flex Version 3.7.7.0
- Rail Apps and Libraries
- 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 |
|---|---|---|
| 2025 | 2025/10 | Version 3.7.7.0 |
| 2025/02 | Version 3.7.6.0 |
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| 2025/01 | Version 3.5.7.0 |
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| 2024 | 2024/10 | Version 3.7.5.0 |
| 2024/08 | Version 3.7.4.0 |
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| 2024/07 | Version 3.5.6.0 |
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| 2024/05 | Version 3.7.3.0 |
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| 2024/04 | Version 3.7.2.0 |
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| 2024/03 | Version 3.6.3.0 |
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| 2024/02 | Version 3.7.1.0 |
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| 2024/01 | Version 3.5.5.0 |
USB Device Stack 1.2.4.0
- Targeted quality improvements and bug fixes.
| Release | Date | Release Notes |
|---|---|---|
| 2025 | 2025/10 | Version 1.2.4.0 |
| 2024 | 2024/08 | Version 1.2.3.0 |
| 2024/05 | Version 1.2.2.0 |
|
| 2024/04 | Version 1.2.1.0 |
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 |
|
| 2024/01 | Version 1.9.0.0 |
Zigbee EmberZNet Version 7.5.1.0
- Zigbee
- Limited support of GCC LTO
- 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 |
|---|---|---|
| 2025 | 2025/10 | Version 7.5.1.0 |
| 2025/02 | Version 7.5.0.0 |
|
| 2025/01 | Version 7.2.7.0 |
|
| 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 |
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| 2024/02 | Version 7.4.1.0 |
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| 2024/01 | Version 7.2.5.0 |
Z-Wave and Z-Wave Long Range 700/800 SDK 7.21.7.0
- Deprecate 800 Series support in the release stream
- Support zwave_ncp_zniffer on ZG14 devices
- Various backport from newer versions
- Recommended to move to the Simplicity SDK release stream for 800 Series.
| Release | Date | Release Notes |
|---|---|---|
| 2025 | 2025/10 | Version 7.21.7.0 |
| 2025/02 | Version 7.21.6.0 |
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| 2025/01 | Version 7.19.8.0 |
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| 2024 | 2024/10 | Version 7.21.5.0 |
| 2024/08 | Version 7.21.4.0 |
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| 2024/05 | Version 7.21.3.0 |
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| 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 |
|
| 2024/01 | Version 7.19.5.0 |
Software APIs and Documentation
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