Regarding how to let Mainconsole or Crystal send alert when someone is not recognized by NuFace
1. If the person is detected but not recognized by NuFace, the metadata shows “name:-” in the tag.
Therefore we can ask Smart Guard to send alert if it sees keyword "name:-" . Please see below:
2. If the person is recognized , the tag looks like "name:xxxx" but not "name:-", so it won't trigger the alert.