With Silicon Labs Bluetooth Mesh SDK, you can build reliable and secure wireless mesh applications for industrial and commercial IoT segments. The Mesh SDK has your entire product life-cycle covered, from development to over-the-air maintenance. Our simplified Mesh stack always supports the latest protocol version, cutting-edge features, and robust security. It works with C-based GCC or IAR compilers and Silicon Labs Simplicity Studio, an intuitive development environment and the most valuable dev toolbox free-of-charge.
Overview
Bluetooth Mesh SDK
The Bluetooth Mesh Software Development Kit is part of the Silicon Labs GSDK. It consists of an extensive library of example projects, peripheral drivers, the Bluetooth Mesh protocol stack, and the API.
Hardware-agnostic Stack
With Silicon Labs, you have just one proven, hardware-agnostic software stack and API for Bluetooth Mesh. This approach speeds up development and radically simplifies SW and HW migration to your new Bluetooth Mesh products – it results in more robust software and reduces development and maintenance costs.
The Latest Bluetooth Mesh Specification
With Silicon Labs Bluetooth Mesh stack, you can keep your products ahead of the competition! Our stack evolves in the frontline of the industry to support the latest specifications and deliver all the essential features among the first in the world.
Bluetooth Mesh Software Features and Benefits
| Features | Benefits | |
|---|---|---|
| Mesh Node Types | All the node types specified for Bluetooth Mesh are supported on Silicon Labs stack: Relay, Proxy, Friend, and Low Power Node (LPN). | |
| Provisioning Protocols | When adding new nodes on the Mesh network, the provisioner and provisioned node can communicate over either PB-ADV or PB-GATT bearers. This ensures that your application also works on older smartphones with Bluetooth Low Energy and GATT support. | |
| GATT Services | Both GATT services are supported in Silicon Labs Bluetooth Mesh – Proxy and Provisioning. | |
| Host interfaces | Host Network Co-processor (NCP) interfaces include 4-wire UART with RTS/CTS control or 2-wire UART without RTS/CTS GPIOs for sleep and wakeup management. | |
| Wi-Fi Coexistence | Are you developing IoT devices with multiple 2.4 GHz protocols such as Wi-Fi and Bluetooth Mesh? With Silicon Labs’ Wi-Fi Coexistence, you can reduce interference and increase reliability! It is based on packet traffic arbitration (PTA) and allows the Bluetooth Mesh device to coordinate transmitting and receiving with the collocated Wi-Fi device. | |
| Non-volatile memory | With Silicon Labs Bluetooth Mesh, you can adjust the memory block size per your data and settings. There are two non-volatile memory options: NVM3 and Persistent Storage (PS) are supported with B/MG1, B/MG12, B/MG13, while NVM3 is supported with B/MG21 and B/MG22. |
Security
Mesh Stack Security
Silicon Labs Bluetooth Mesh stack is equipped with all the specified security features.
ECDH - Elliptic-curve Diffie–Hellman key agreement
AES-128 encryption, authentication, and obfuscation for authenticating messages and prevent data tracking
Out-of-Band authentication to add a device to the Mesh network securely with user verified random numbers
Replay protection to prevent Man-In-The-Middle (MITM) attacks
Key refresh (blacklist) to change security keys during the lifetime of a device
Secure Execution Environment
If your IoT application requires security beyond the Bluetooth specification, Silicon Labs hardware supports mbed TLS, a trusted execution environment for Bluetooth applications.
Secure Maintenance Over-the-Air
Maintain your entire installed base via the secure OTA firmware update, which authenticates the update file source, encrypts the process using AES-128, and guarantees an unaltered firmware via the secure boot.
Secure Firmware Updates
Our Secure Gecko Bootloader supports authenticated and AES-128 encrypted software updates via OTA, UART, Secure Boot, flash partitioning, and internal and external SPI for flash.
Hardware Security
In addition to the full range of software security features, your IoT applications will be protected by Silicon Labs hardware security.
Mesh Development Tools
Silicon Labs Bluetooth Mesh SDK uses C programming language, and you can use it with GCC or IAR compilers. For ultimate speed and easiness of development, we recommend our Simplicity Studio, the unified development environment for all Silicon Labs technologies and hardware.
Simplicity Studio
Simplicity Studio provides an intuitive dev experience and the most valuable toolbox free-of-charge.
When you install Simplicity Studio, it automatically customizes your development environment and installs the SDKs based on the target hardware. Everything is wrapped into a single, intuitive, end-to-end dev experience – including Eclipse-based IDE, the correct version of GCC toolchain, Make, Commander, J-Link drivers, energy profiler, network analyzer, PIN tool, GATT configurator, Mesh Configurator, and more. It is the only development tool to download with Silicon Labs.
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.
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GitHubSilicon Labs wireless IoT SDKs are also available for download on GitHub. |
Tech Docs
Gecko SDK Release Notes (4.2.2.0.)
Latest Release - Q1/2023 (March 2023)
Bluetooth Mesh Version 4.2.0.0
- Support for Mesh draft specification 1.1
- Mesh Protocol
- Mesh Binary Large Object Transfer Model (MBT)
- Mesh Device Firmware Update Model (DFU)
- Reduced project flash consumption by optimizing Mesh stack code size
- Support added for xGM240P PCB Modules and BG22/BGM220 Explorer Kits
- Support added for GCC version 10.3-2021.10 and IAR version 9.20.4
| Release | Date | Release Notes |
|---|---|---|
| 2023 | 2023/03 | Version 4.2.0.0  |
| 2022 | 2022/10 | Version 3.0.3.0 |
| 2022/09 | Version 3.0.2.0 |
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| 2022/08 | Version 3.0.1.0 |
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| 2022/06 | Version 3.0.0.0 |
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| 2022/03 | Version 2.2.2.0 |
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| 2022/01 | Version 2.2.1.0 |
Bluetooth Mesh ADK Version 3.1.4.0
- Application min SDK version changed to Android 28 and iOS 12
- Library min SDK version changed to Android 26 (no change to iOS)
- IOP tests added
- Simultaneous provisioning of multiple devices and simultaneous proxy ses- sions
- Performance and stability improve- ments
| Release | Date | Release Notes |
|---|---|---|
| 2021 | 2021/10 | Version 3.1.4.0 |
| 2021/09 | Version 3.1.3.0 |
|
| 2021/07 | Version 3.1.1.0 |
Gecko Platform Version 4.2.2.0
- Support for EFR32xG25 devices
- Support for MGM240Dx modules
- Support for BGM24x modules
- Improved CPC UART drivers reliability
- Many CPC improvements
- Android support for CPCd
- Security:
- Updates the Mbed TLS library to version 3.2.1, with support for CBAP
- Updated ITS driver (version 3) for optimised key look up time
- Updated software support for TrustZone, Evaluation quality
| Release | Date | Release Notes |
|---|---|---|
| 2023 | 2023/03 | Version 4.2.2.0 |
| 2023/02 | Version 4.2.1.0 |
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| 2023/01 | Version 4.1.4.0 |
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| 2022 | 2022/12 | Version 4.2.0.0 |
| 2022/10 | Version 4.1.3.0 |
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| 2022/09 | Version 4.1.2.0 |
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| 2022/08 | Version 4.1.1.0 |
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| 2022/06 | Version 4.1.0.0 |
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| 2022/03 | Version 4.0.2.0 |
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| 2022/01 | Version 4.0.1.0 |
Community & Support