{
    "extends": "sensor",
    "description": "The presence sensor interface provides information whether a certain thing, for instance a human person, a tracked animal, a tracked mobile phone or smart watch is currently present. Additionally it gives information about the last time the tracked thing has been seen.",
    "states": [
        {
            "name": "isPresent",
            "type": "bool"
        },
        {
            "name": "lastSeenTime",
            "type": "int",
            "unit": "UnixTime"
        }
    ]
}