Firebase 第 3 部分 - 访问公共数据集
本部分将向您介绍我们在现场演示中发布的不同公共数据集。
我们的公共数据集位于 dw-demo01.firebaseio.com。 该应用会接收来自物联网设备管理门户“物”对象的所有数据。 您可以访问其中任一对象中静态属性、告警、位置和属性的所有当前值。 如果您要查找历史数据，则应在与 Google BigQuery 的集成中进行历史查询。
要用演示数据了解如何查看当前数据，请访问以下链接：https://dw-demo-01.firebaseio.com/.json
示例文档
以下是 JSON 文档的示例：
示例文档
{
"DEMO": {
"things": {
"00900b17f958": {
"gateway": {
"appVersion": "1.0",
"dwPlatform": "Linux-X86-Generic",
"dwProduct": "DW-Gateway.Lanner",
"dwVersion": "14.2.0-014",
"make": "unknown",
"model": "unknown",
"remShell": false
},
"lastSeen": "2014-12-09T11:32:23.673393438Z",
"properties": {
"mbps_down": {
"ts": "2014-12-09T11:32:23.672Z",
"value": 0.046426
},
"mbps_up": {
"ts": "2014-12-09T04:08:03.672Z",
"value": 0.68726
}
},
"tunnelLatencies": {
"router-ap01": 833,
"router-eu01": 569,
"router-us01": 196
},
"updatedBy": "00900b17f958",
"updatedOn": "2014-12-06T15:54:10.082Z"
},
"12e692ba0f62": {
"gateway": {
"appVersion": "2.0",
"dwPlatform": "Linux-X86-Generic",
"dwProduct": "DW-Gateway.Linux",
"dwVersion": "14.2.0-014",
"make": "unknown",
"model": "unknown",
"remShell": false
},
"tunnelLatencies": {
"router-ap01": 826,
"router-eu01": 365,
"router-us01": 20
},
"updatedBy": "12e692ba0f62",
"updatedOn": "2014-12-08T14:33:09.211Z"
},
"352054050628750": {
"alarms": {
"engine": {
"msg": "",
"state": 0,
"ts": "2014-12-09T14:03:58.888Z"
},
"fuellevel": {
"msg": "",
"state": 3,
"ts": "2014-12-08T15:53:50.851Z"
},
"speed": {
"msg": "Engine has been stopped.",
"state": 4,
"ts": "2014-12-09T14:03:58.893Z"
}
},
"lastSeen": "2014-12-09T14:03:58.882742556Z",
"loc": {
"address": {
"city": "Gent",
"country": "BE",
"state": "Vlaanderen",
"street": "Edmond Helderweirdtstraat",
"streetNumber": "",
"zipCode": "9041"
},
"altitude": -0.7,
"corrId": "trip-20141209-13:38:43",
"delta": 113.75790742446934,
"fixAcc": 0,
"fixType": "GPS",
"heading": 93,
"id": "54870124aefed93e2f037afa",
"lat": 51.08456,
"lng": 3.77802,
"speed": 1,
"thingId": "538e118a5d80f11f080217fe",
"ts": "2014-12-09T14:03:16.481Z"
},
"locUpdated": "2014-12-09T14:03:16.481Z",
"properties": {
"fuelecon": {
"ts": "2014-12-09T14:03:59.001Z",
"value": 0
},
"fuellevel": {
"ts": "2014-12-09T14:03:01.84Z",
"value": 68.2
},
"odometer": {
"ts": "2014-12-09T14:03:01.761Z",
"value": 6989
},
"rpm": {
"ts": "2014-12-09T14:03:58.947Z",
"value": 0
},
"speed": {
"ts": "2014-12-09T14:03:58.899Z",
"value": 0
},
"speed_limit_delta": {
"ts": "2014-12-08T17:39:22.186Z",
"value": 0
},
"tripmiles": {
"ts": "2014-12-09T14:03:58.882Z",
"value": 6
}
}
},
"homehvac": {
"lastSeen": "2014-12-09T16:07:26.771449115Z",
"properties": {
"brhum": {
"ts": "2014-12-09T16:04:24.28Z",
"value": 45
},
"brlight": {
"ts": "2014-12-09T16:06:23.773Z",
"value": 11
},
"brtemp": {
"ts": "2014-12-08T06:46:26.773Z",
"value": 71.400002
},
"lrhum": {
"ts": "2014-12-09T15:59:16.408Z",
"value": 54
},
"lrlight": {
"ts": "2014-12-09T16:07:18.789Z",
"value": 39.799999
},
"lrtemp": {
"ts": "2014-12-08T20:03:29.284Z",
"value": 76.300003
},
"offhum": {
"ts": "2014-12-09T16:03:24.279Z",
"value": 41
},
"offlight": {
"ts": "2014-12-09T16:07:26.77Z",
"value": 118
},
"offtemp": {
"ts": "2014-12-09T04:30:29.283Z",
"value": 73.199997
}
}
},
"homepower": {
"alarms": {
"hvacrun": {
"msg": "",
"state": 0,
"ts": "2014-12-09T05:09:51.288Z"
},
"whrun": {
"msg": "",
"state": 0,
"ts": "2014-12-09T14:47:29.281Z"
}
},
"lastSeen": "2014-12-09T15:58:53.409257477Z",
"properties": {
"hvac": {
"ts": "2014-12-09T14:47:11.277Z",
"value": 3
},
"main": {
"ts": "2014-12-09T15:58:51.407Z",
"value": 638
},
"office": {
"ts": "2014-12-09T12:03:51.286Z",
"value": 245
},
"other": {
"ts": "2014-12-09T15:58:53.408Z",
"value": 272
},
"refrigerator": {
"ts": "2014-12-09T15:54:29.406Z",
"value": 136
},
"waterheater": {
"ts": "2014-12-09T14:47:29.28Z",
"value": 0
}
}
},
"homesprinkler": {
"alarms": {
"zone1": {
"msg": "",
"state": 0,
"ts": "2014-12-09T09:10:04.288Z"
},
"zone2": {
"msg": "",
"state": 0,
"ts": "2014-12-09T09:20:04.289Z"
},
"zone3": {
"msg": "",
"state": 0,
"ts": "2014-12-09T09:30:04.286Z"
},
"zone4": {
"msg": "",
"state": 0,
"ts": "2014-12-09T09:40:04.285Z"
}
},
"lastSeen": "2014-12-09T09:40:04.287769697Z"
},
"homeweather": {
"lastSeen": "2014-12-09T16:05:40.000125416Z",
"properties": {
"barometer": {
"ts": "2014-12-09T14:52:33Z",
"value": 30.032
},
"diff_temp": {
"ts": "2014-12-09T15:53:40.001Z",
"value": -11.300003
},
"inside_rh": {
"ts": "2014-12-09T15:00:28Z",
"value": 53
},
"inside_temp": {
"ts": "2014-12-09T15:01:23Z",
"value": 74
},
"outside_rh": {
"ts": "2014-12-09T15:56:39Z",
"value": 84
},
"outside_temp": {
"ts": "2014-12-09T15:53:39Z",
"value": 62.599998
},
"rain_rate": {
"ts": "2014-12-09T14:52:33Z",
"value": 0
},
"wind_dir": {
"ts": "2014-12-09T16:05:24Z",
"value": 279
},
"wind_speed": {
"ts": "2014-12-09T16:05:39Z",
"value": 3
}
}
},
"xerox6180": {
"lastSeen": "2014-12-06T15:54:31.472384526Z",
"properties": {
"printcolor": {
"ts": "2014-12-06T15:54:31.47Z",
"value": 3351
},
"supplyblack": {
"ts": "2014-12-06T15:54:31.519Z",
"value": 80
},
"supplycyan": {
"ts": "2014-12-06T15:54:31.518Z",
"value": 80
},
"supplymagenta": {
"ts": "2014-12-06T15:54:31.519Z",
"value": 100
},
"supplyyellow": {
"ts": "2014-12-06T15:54:31.519Z",
"value": 100
}
}
}
}
}
}
理解 JSON
JSON 结构与 thing.find API 查询返回的结果相匹配，您可以在此处查看有关 JSON 的信息： thing.find
您已完成本指南
本指南演示了一系列实用的强大功能，包括如何从物联网收集数据，如何根据需要筛选和处理数据，以及如何将适当的数据从物联网设备管理门户发送至 Firebase，并在其中使用多种库和工具处理这些数据，从而构建实时应用。
前往下一部分获取更多资源，进一步了解该平台。