{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "#/components/schemas/HumanPresenceReading",
  "title": "HumanPresenceReading",
  "type": "object",
  "description": "Human presence sensor reading",
  "properties": {
    "presence": {
      "type": "string",
      "enum": [
        "Unknown",
        "Present",
        "NotPresent"
      ]
    },
    "engagement": {
      "type": "string",
      "enum": [
        "Unknown",
        "Engaged",
        "Unengaged"
      ]
    },
    "distanceInMillimeters": {
      "type": "integer",
      "description": "Estimated distance to user"
    },
    "headPosition": {
      "type": "object",
      "properties": {
        "azimuthInDegrees": {
          "type": "number",
          "format": "float"
        },
        "altitudeInDegrees": {
          "type": "number",
          "format": "float"
        }
      }
    },
    "headOrientation": {
      "type": "object",
      "properties": {
        "pitchInDegrees": {
          "type": "number",
          "format": "float"
        },
        "rollInDegrees": {
          "type": "number",
          "format": "float"
        },
        "yawInDegrees": {
          "type": "number",
          "format": "float"
        }
      }
    },
    "timestamp": {
      "type": "string",
      "format": "date-time"
    }
  }
}