Get Last Changed Data¶

Get the last changed data of the specified measurement points of specified devices.

Operation Permissions¶

Required Authorization	Required Operation Permission
Asset	Read

For more information about resources and required permission, see Policies, Roles and Permissions>>

Request Format¶

POST https://{apigw-address}/tsdb-service/v2.1/data/last-changed

Request Parameters (URI)¶

Name	Location (Path/Query)	Mandatory/Optional	Data Type	Description
orgId	Query	Mandatory	String	The organization ID which the asset belongs to. How to get organization ID>>

Request Parameters (Body)¶

Name	Mandatory/Optional	Data Type	Description
assetIds	Mandatory	String	The asset ID. Supports the query of multiple asset IDs, separated by commas. How to get asset ID>>
pointIds	Mandatory	String	The measurement point ID. Supports the query of multiple measurement point IDs, separated by commas. How to get measurement point ID>>
ifWithLocalTime	Optional	Boolean	true = returns data in local time format false (default) = does not return data in local time format
localTimeAccuracy	Optional	Boolean	true = query returns data with millisecond time stamp false (default) = query returns data without millisecond time stamp
localTimeFormat	Optional	Integer	Specify whether the local time value includes time zone information of devices. 0 (default): without time zone information; 1: with time zone information.
itemFormat	Optional	Integer	Specify the displaying format of the returned device data. Available options are 0, 1, and 2. For the example of each displaying format, see Item Format Example>>

Response Parameters¶

Name	Data Type	Description
data	List<JSONObject>	The list of asset last changed data records. For more information, see items

items¶

Sample¶

{
        "assetId": "yourAssetId",
        "yourPointId": "1.1236",
        "timestamp": 1560249312446
}

Parameters¶

Name	Data Type	Description
assetId	String	The asset ID.
timestamp	Long	The data timestamp (UNIX time, accurate to the second).
pointId	Double	This parameter is a variable, representing the identifier and data of the measurement point.
localtime	String	The data timestamp in local time format (accurate to the second). The value of the `localTimeFormat` parameter determines whether the local time value includes the time zone information.

Error Codes¶

For description of error codes, see Common Error Codes.

Sample¶

Request Sample¶

url: https://{apigw-address}/tsdb-service/v2.1/data/last-changed?orgId=yourOrgId

method: POST

Content-Type: application/json

requestBody:
{
  "pointIds": "yourPointId1,yourPointId2,yourPointId3",
  "ifWithLocalTime": true,
  "assetIds": "yourAssetId1,yourAssetId2",
  "localTimeFormat": 0,
  "localTimeAccuracy": true,
  "itemFormat": 0
}

Return Sample¶

{
  "msg": "OK",
  "code": 0,
  "data": {
    "items": [
      {
        "assetId": "yourAssetId1",
        "yourPointId1": 29,
        "localtime": "2021-01-14 23:29:00.000",
        "timestamp": 1610638140000
      },
      {
        "assetId": "yourAssetId1",
        "yourPointId2": "another_00",
        "localtime": "2021-01-14 23:00:00.000",
        "timestamp": 1610636400000
      },
      {
        "assetId": "yourAssetId1",
        "yourPointId3": 1,
        "localtime": "2021-01-14 23:10:00.000",
        "timestamp": 1610637000000
      },
      {
        "assetId": "yourAssetId2",
        "yourPointId1": 1,
        "localtime": "2021-01-14 23:10:00.000",
        "timestamp": 1610637000000
      },
      {
        "assetId": "yourAssetId2",
        "yourPointId2": 1,
        "localtime": "2021-01-15 07:30:00.000",
        "timestamp": 1610667000000
      },
      {
        "assetId": "yourAssetId2",
        "yourPointId3": 29,
        "localtime": "2021-01-14 23:29:00.000",
        "timestamp": 1610638140000
      }
    ]
  },
  "submsg": ""
}

SDK Samples¶

You can access the `Java SDK Samples<https://github.com/EnvisionIot/sample-code-java/tree/EnOS2.4/tsdbdata>`__for TSDB data service on Github.