Optional
breadcrumbThe Breadcrumb field, if present, shall be used to atomically set the Breadcrumb attribute in the General Commissioning cluster on success of the associated command. If the command fails, the Breadcrumb attribute in the General Commissioning cluster shall be left unchanged.
Optional
ssidThis field, if present, shall contain the SSID for a directed scan of that particular Wi-Fi SSID. Otherwise, if the field is absent, or if it is null, this shall indicate scanning of all BSSID in range. This field shall be ignored for ScanNetworks invocations on non-Wi-Fi server instances.
Input to the NetworkCommissioning scanNetworks command
See
MatterSpecification.v13.Core § 11.9.7.1