GET /devices//datastreams/KEY HTTP/1.1

Host: api.heclouds.com

api-key: pmWLtnkDBSreKfvg7GsClUXdXa4A

Connection: close

HTTP/1.1  OK

Date: Sun,  Sep  :: GMT

Content-Type: application/json

Content-Length:

Connection: close

Server: Apache-Coyote/1.1

Pragma: no-cache

{"errno":,"data":{"create_time":"2015-09-06 16:00:25","update_at":"2015-09-20 16:58:45","id":"KEY","current_value":""},"error":"succ"}