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# Inquire Datastream Information in Batch

Request Method: GET

URL: http://api.heclouds.com/devices/device_id/datastreams

device_id: need to be replaced with device ID

URL Request Parameter

Parameter Name Format Required Description
datastream_ids string no datastream ID, multiple ids separated by commas, default to inquire all datastream

http Header

Parameter Name Format Required Description
api-key string yes must be masterkey or apikey with access authority of the device

Return Parameter

Parameter Name Format Description
errno int code for call error, 0 indicates call is successful
error string error description, "succ" indicates call is successful
data array-json device related information returned after successful interface call, see data description table
data Description Table
Parameter Name Format Description
id string datastream ID
create_time string datastream creation time
update_at string latest data upload time
current_value string/int/json... latest datapoint

Example of Request

GET http://api.heclouds.com/devices/20474930/datastreams?datastream_ids=aaa,bbb HTTP/1.1

Example of Return

{
    "errno": 0,
    "data": [{
        "update_at": "2017-11-20 10:03:10",
        "id": "aaa",
        "create_time": "2017-11-20 09:59:35",
        "current_value": {
            "Header": {
                "CipherType": 1,
                "DevType": 1
            },
            "Body":  3
        }
    }, {
        "update_at": "2017-12-22 10:30:22",
        "id": "bbb",
        "create_time": "2017-12-22 10:12:36",
        "current_value": 1
    }],
    "error": "succ"
}

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