"hourly": [      {        "p2_sum": 119, //total PM2.5 concentration within 1 hour        "p2_count": 4, //number of measurements taken within 1 hour        "p1_sum": 130, //total PM10 concentration within 1 hour        "p1_count": 4, //number of measurements taken within 1 hour        "co_sum": 1809, //total CO2 concentration within 1 hour        "co_count": 4, //number of measurements taken within 1 hour        "hm_sum": 95,        "hm_count": 4,        "tp_sum": 20.24477,        "tp_count": 4,        "ts": "2017-12-08T02:00:00.000Z",        "outdoor_station": {  //refer to the documentation link above          "ts": "2017-12-06T15:00:00.000Z",          "aqius": 41,          "mainus": "p2",          "aqicn": 14,          "maincn": "p2",          "p2": {            "conc": 10,            "aqius": 41,            "aqicn": 14          },          "api_id": "4395"        },        "outdoor_weather": {          "ts": "2017-12-06T15:00:00.000Z",          "tp": 4,          "pr": 1025,          "hu": 29,          "ws": 0,          "wd": 327,          "ic": "01n"        }      },