{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "title": "Payload",
  "anyOf": [
    {
      "description": "You can send a single message in a payload",
      "allOf": [
        {
          "$ref": "#/definitions/MqttMessagePayload"
        }
      ]
    },
    {
      "$ref": "#/definitions/MqttSensorPayload"
    },
    {
      "description": "You can also send a list in a payload. You should try to use this approach if applicable.",
      "allOf": [
        {
          "$ref": "#/definitions/MqttMessagePayloadList"
        }
      ]
    },
    {
      "$ref": "#/definitions/MqttSensorPayloadList"
    }
  ],
  "definitions": {
    "MqttMessagePayload": {
      "type": "object",
      "required": [
        "class_id",
        "lat",
        "long",
        "tracking_id"
      ],
      "properties": {
        "acceleration_ms": {
          "description": "the current acceleration in meters per second",
          "type": [
            "number",
            "null"
          ],
          "format": "float"
        },
        "class_confidence": {
          "description": "An percentage value specifying how confident the client is about the objects class",
          "type": [
            "number",
            "null"
          ],
          "format": "float"
        },
        "class_id": {
          "description": "An integer that corresponds to an object class. The mapping is currently done globally.",
          "type": "integer",
          "format": "int32"
        },
        "data": {
          "description": "This field can be used to store arbitrary JSON data"
        },
        "heading": {
          "description": "Heading information in radians",
          "type": [
            "number",
            "null"
          ],
          "format": "float"
        },
        "lat": {
          "description": "Latitude information as specified in ISO 6709",
          "type": "number",
          "format": "double"
        },
        "level": {
          "description": "Height information in centimeters",
          "type": [
            "number",
            "null"
          ],
          "format": "float"
        },
        "long": {
          "description": "Longitude information as specified in ISO 6709",
          "type": "number",
          "format": "double"
        },
        "object_height": {
          "description": "An objects height in centimeters",
          "type": [
            "number",
            "null"
          ],
          "format": "float"
        },
        "object_length": {
          "description": "An objects length in centimeters",
          "type": [
            "number",
            "null"
          ],
          "format": "float"
        },
        "object_width": {
          "description": "An objects width in centimeters",
          "type": [
            "number",
            "null"
          ],
          "format": "float"
        },
        "pitch": {
          "description": "Pitch information in radians",
          "type": [
            "number",
            "null"
          ],
          "format": "float"
        },
        "time": {
          "description": "The time at which the measurement was taken. This value is optional and if no value is supplied, the time the server receives the message is used as a default.",
          "type": [
            "string",
            "null"
          ],
          "format": "date-time"
        },
        "tracking_id": {
          "description": "A tracking id given to an object to distinguish it from other objects. The tracking id can be assigned by the client and will be internally mapped to a unique uuid by the server. The tracking id isn't required to be globally unique and can repeat after some time (~3h).",
          "type": "integer",
          "format": "uint32",
          "minimum": 0.0
        },
        "velocity_ms": {
          "description": "the current velocity recorded in meters per second",
          "type": [
            "number",
            "null"
          ],
          "format": "float"
        }
      }
    },
    "MqttMessagePayloadList": {
      "type": "object",
      "required": [
        "measurements"
      ],
      "properties": {
        "measurements": {
          "description": "A list of measurements",
          "type": "array",
          "items": {
            "$ref": "#/definitions/MqttMessagePayload"
          }
        }
      }
    },
    "MqttSensorPayload": {
      "type": "object",
      "required": [
        "sensor_id"
      ],
      "properties": {
        "lat": {
          "description": "Latitude information as specified in ISO 6709 - can be sent to position the sensor",
          "type": [
            "number",
            "null"
          ],
          "format": "double"
        },
        "level": {
          "description": "Height information in centimeters - can be sent to position the sensor",
          "type": [
            "number",
            "null"
          ],
          "format": "float"
        },
        "long": {
          "description": "Longitude information as specified in ISO 6709 - can be sent to position the sensor",
          "type": [
            "number",
            "null"
          ],
          "format": "double"
        },
        "sensor_class_id": {
          "description": "An integer that corresponds to a sensor object class. The mapping is currently done globally.",
          "type": [
            "integer",
            "null"
          ],
          "format": "int32"
        },
        "sensor_id": {
          "description": "A sensor id given to a sensor to distinguish it from other sensors. The sensor id is assigned by the client and must be unique for the location. The sensor id will be internally mapped to a unique uuid by the server.",
          "type": "integer",
          "format": "uint32",
          "minimum": 0.0
        },
        "state": {
          "description": "This field can be used to store the current sensor state as key-value-pair"
        },
        "time": {
          "description": "The time at which the measurement was taken. This value is optional and if no value is supplied, the time the server receives the message is used as a default.",
          "type": [
            "string",
            "null"
          ],
          "format": "date-time"
        }
      }
    },
    "MqttSensorPayloadList": {
      "type": "object",
      "required": [
        "measurements"
      ],
      "properties": {
        "measurements": {
          "description": "A list of measurements",
          "type": "array",
          "items": {
            "$ref": "#/definitions/MqttSensorPayload"
          }
        }
      }
    }
  }
}