RE: Inquiry About Enabling Matter Diagnostic Log Function in Sample Project

Marte Myrvold — Thu, 16 Oct 2025 07:17:52 GMT

Hi,

Selecting the diagnostic-logs snippet in the VS Code build configuration is the same as adding -DSNIPPET=diagnostic-logs to the build command. With sysbuild, when you only use -DSNIPPET, the snippet will be applied to all images in the build (in this case, both light_bulb and MCUboot). Since the configs enabled by the diagnostic-logs snippet should only be applied to the light_bulb image, you must specify the image as part of the command, i.e., you must use -Dlight_bulb_SNIPPET=diagnostic-logs.

Adding the snippet with -Dlight_bulb_SNIPPET=diagnostic-logs should be enough to use it, but you can also find more information in our documentation: Matter - Diagnostic logs snippet.

Best regards,
Marte