Creating Matter Applications using SLC CLI#

Silicon Labs Configurator (SLC): SLC offers command-line access to application configuration and generation functions. Software Project Generation and Configuration with SLC-CLI provides instructions on downloading and using the SLC-CLI tool.

This guide lists the steps to create and build a Silicon Labs Matter SLC project using SLC-CLI and make. These scripts are evaluation quality and have been verified to work on Ubuntu 22.04.3 LTS, MacOS Version 13.5.1, and Windows 10.

Setting up the Environment#

Clone Gecko SDK:

git clone

Create a directory named extension inside the Gecko SDK directory.

Clone the Matter GSDK Extension inside the extension directory:

git clone

To use SiWx91x Wi-Fi applications, clone the WiSeConnect SDK inside the extension directory.

git clone

Your path to the Matter extension and WiSeConnect extension should look like:


Install the following python packages:

pip3 install dload
pip3 install python-dotenv  

Change directory to cloned extension directory and run the script. This will install the ARM gcc toolchain, SLC-CLI, ZAP, Simplicity Commander, Ninja, and Java.

For Mac and Linux:

cd extension/matter_extension
python3 slc/

For Windows:

cd extension\matter_extension
python slc\

The script creates an .env file to be used to set the environment variables needed for the installed tools, ARM toolchain, SLC-CLI, Java ZAP, Simplicity Commander, Ninja, and Java.

It will also create environment_variables_vscode.txt. This file can be referred to add environment variables for VS Code based builds.

The script will ask you for permission to trust gecko_sdk, matter_extension, and wiseconnect.

Creating an Application Project#

Run the script to create a BRD4161A project with name MyNewApp starting from the lighting-app-thread.slcp example application project file:

The script will ask user permission to trust the gecko_sdk and matter_extension before generating.

For Mac and Linux:

python3 slc/ MyNewApp slc/sample-app/lighting-app/efr32/lighting-app-thread.slcp brd4161a

For Windows:

python slc\ MyNewApp slc\sample-app\lighting-app\efr32\lighting-app-thread.slcp brd4161a

Building an Application Project#

After a project is created the script can be used to re-generate the MyNewApp project and build it:

For Mac and Linux:

python3 slc/ MyNewApp/lighting-app-thread.slcp brd4161a

For Windows:

python slc\ MyNewApp\lighting-app-thread.slcp brd4161a

Alternately, one can use SLC-CLI commands directly to generate the project and then use make to build it.

Windows users will need to install make in their system. You can use your own or follow these steps to get make.

  1. Install the MSYS terminal, which provides a Unix-like environment on Windows.

  2. Open the MSYS terminal and install make using the command pacman -S make.

  3. Run command where make, copy the path, and add it to the PATH environment variable.

  4. Restart your command line terminal and run slc/ or run make directly. You might need to reboot.

Note: In rare cases, the build may fail due to missing files in the zap-generated/ directory. The workaround is to delete the .zap folder in the home directory.

Modifying an Application Project#

The resulting user project can be modified like any other SLC project: software components can be added or removed by modifying the project's .slcp file, configuration can be applied by modifying the files in the config directory, the application logic can be managed through the files in the src directory. Various SLC-CLI commands can be used to examine, validate, or re-generate the project after a modification, see Software Project Generation and Configuration with SLC-CLI for more information.

For modifying Matter endpoints and clusters invoke the ZAP tool passing to it the application's ZAP file:

./scripts/tools/zap/ MyNewApp/config/common/lighting-thread-app.zap

##Edit and Build with Visual Studio Code

Install the "Simplicity Studio for VS Code" extension on VS code.

Add the POST_BUILD_EXE and NINJA_BUILD_EXE variables from the slc\tools\environment_variables_vscode.txt to the environment variables.

Run the and to set up and create a sample application, then load the application in VS Code by following the "Adding a VS Code-Enabled Simplicity Studio Project to VS Code" section from Simplicity Studio User Guide

You can make all the changes in source files and regenerate app using 'slc generate' commands.