How to Build and Flash the Matter Accessory Device (MAD)
The Matter Accessory Device, such as the lighting-app, is the actual Matter device that you will commission onto the Matter network and control using the chip-tool.
Step 1: Get the Image File to Flash the MAD
We have provided two ways to get the required image to flash the MAD. You can use one of the following options:
- Use the pre-built image file 
- Build the image file from the ‘ - matter’ repository
- Using the Pre-Built Image File- All of the Matter Accessory Device image files are accessible through the Matter Artifacts Page. If you are using a pre-built image file, you can skip forward to Step #2: Flashing the MAD. - If you are coming from Simplicity Studio, you may have already installed the demo image in Simplicity Studio in which case you can skip forward to the next step. 
- Building the Matter Image File from the Repository- IMPORTANT: A complete list of software requirements for Silicon Labs Matter 15.4 development is included on the Matter Software Requirements page. Be sure that you have satisfied these requirements before proceeding. - The Matter Accessory Device (lighting-app) can be built out of this repo. - Documentation on how to build and use the lighting-app Matter Accessory Device is provided in this README.md - Please note that you only need to build a single device for the demo such as the lighting-app. If you wish to build other examples such as the sleepy end device you are welcome to, but it is not necessary for the demo. - Additional examples are provided in /examples directory, or /silabs_examples (such as - onoff-plug-app).- The build process puts all image files in the following location: - <git location>/matter/out/<app name>/<board name>
Step 2: Flash the Matter Accessory Device
For more information on how to flash your Silabs development platform see the following instructions: How to Flash a Silicon Labs Device
Once your Matter Accessory Device has been flashed it should show a QR code on the LCD. If no QR Code is present it may be that you need to add a bootloader to your device. Bootloader images are provided on the Matter Artifacts page.