获得访问令牌并完成初始设备列表调用后,您现在就可以使用 SDM API 来访问和控制设备了。
列出结构和设备
使用 curl 向 structures 端点发出简单的 GET 调用:
curl -X GET 'https://smartdevicemanagement.googleapis.com/v1/enterprises/project-id/structures' \
-H 'Content-Type: application/json' \
-H 'Authorization: Bearer access-token'成功调用会返回与您的Device Access 项目相关联的账号的结构列表:
{
"structures": [
{
"name": "enterprises/project-id/structures/structure-id",
"traits": {
"sdm.structures.traits.Info": {
"customName": "structure-name"
}
}
}
]
}如果您尚未执行此操作,请向 devices 端点发出 GET 调用,以获取设备列表:
curl -X GET 'https://smartdevicemanagement.googleapis.com/v1/enterprises/project-id/devices' \
-H 'Content-Type: application/json' \
-H 'Authorization: Bearer access-token'如果调用成功,系统会返回与您的 Device Access项目相关联的设备列表。每种设备都有自己的一组可用特征:
{
"devices": [
{
"name": "enterprises/project-id/devices/device-id",
"type": "sdm.devices.types.device-type",
"traits": { ... },
"parentRelations": [
{
"parent": "enterprises/project-id/structures/structure-id/rooms/room-id",
"displayName": "device-room-name"
}
]
}
]
}复制每台设备的 device-id,您需要在其他 API 调用中使用该值。
获取设备信息
如需获取特定设备的信息,请向 device-id 端点发出 GET 调用:
curl -X GET 'https://smartdevicemanagement.googleapis.com/v1/enterprises/project-id/devices/device-id' \
-H 'Content-Type: application/json' \
-H 'Authorization: Bearer access-token'响应应与之前类似,但仅针对特定设备:
{
"name": "enterprises/project-id/devices/device-id",
"type": "sdm.devices.types.device-type",
"traits": { ... },
"parentRelations": [
{
"parent": "enterprises/project-id/structures/structure-id/rooms/room-id",
"displayName": "device-room-name"
}
]
}执行一项命令
通过成功的 GET 调用验证您的访问权限后,请尝试执行命令,具体取决于您已授权的设备类型:
THERMOSTAT
curl -X POST \
'https://smartdevicemanagement.googleapis.com/v1/enterprises/project-id/devices/device-id:executeCommand' \
-H 'Content-Type: application/json' \
-H 'Authorization: Bearer access-token' \
--data-raw '{
"command" : "sdm.devices.commands.ThermostatMode.SetMode",
"params" : {
"mode" : "HEAT"
}
}'CAMERA
curl -X POST \
'https://smartdevicemanagement.googleapis.com/v1/enterprises/project-id/devices/device-id:executeCommand' \
-H 'Content-Type: application/json' \
-H 'Authorization: Bearer access-token' \
--data-raw '{
"command" : "sdm.devices.commands.CameraLiveStream.GenerateRtspStream",
"params" : {}
}'如果调用成功,则会产生以下结果:
THERMOSTAT
您会收到空响应,并且实体温控器会将当前模式更改为命令参数中指定的模式。
{}CAMERA
您会收到直播网址和相关令牌。
{
"results" : {
"streamUrls" : {
"rtspUrl" : "rtsps://someurl.com/CjY5Y3VKaTZwR3o4Y19YbTVfMF...?auth=g.0.streamingToken"
},
"streamExtensionToken" : "CjY5Y3VKaTZwR3o4Y19YbTVfMF...",
"streamToken" : "g.0.streamingToken",
"expiresAt" : "2018-01-04T18:30:00.000Z"
}
}问题排查
不进行身份验证
SDM API 的访问令牌仅在 1 小时内有效。如果您收到 UNAUTHENTICATED 响应,则令牌很可能已过期。使用刷新令牌获取新的访问令牌。
其他错误
如需查看完整的 Device Access 错误代码列表,请参阅错误代码参考文档。