DeviceShadowEnrich活性 - AWS IoT Analytics
AWS 文档中描述的 AWS 服务或功能可能因区域而异。要查看适用于中国区域的差异,请参阅中国的 AWS 服务入门

DeviceShadowEnrich活性

deviceShadowEnrich 活动添加来自 AWS IoT DeviceShadows服务到消息。例如,给定以下消息:

{ "temp": 50, "hum": 40, "device": { "thingName": "my-thing" } }

和以下 deviceShadowEnrich 活动:

{ "deviceShadowEnrich": { "name": "MyDeviceShadowEnrichActivity", "attribute": "shadow", "thingName": "device.thingName", "roleArn": "arn:aws:iam::<your-account-number>:role:MyEnrichRole", "next": "MyDatastoreActivity" } }

结果是一条消息,其类似于以下示例。

{ "temp": 50, "hum": 40, "device": { "thingName": "my-thing" }, "shadow": { "state": { "desired": { "attributeX": valueX, ... }, "reported": { "attributeX": valueX, ... }, "delta": { "attributeX": valueX, ... } }, "metadata": { "desired": { "attribute1": { "timestamp": timestamp }, ... }, "reported": ": { "attribute1": { "timestamp": timestamp }, ... } }, "timestamp": timestamp, "clientToken": "token", "version": version } }

您必须在活动定义的 roleArn 字段中指定已附加适当权限的角色。此角色必须具有类似于以下的权限策略。

{ "Version": "2012-10-17", "Statement": [ { "Effect": "Allow", "Action": [ "iot:GetThingShadow" ], "Resource": [ "arn:aws:iot:<region>:<account-id>:thing/<thing-name>" ] } ] }

和类似如下的信任策略:

{ "Version": "2012-10-17", "Statement": [ { "Sid": "", "Effect": "Allow", "Principal": { "Service": "iotanalytics.amazonaws.com" }, "Action": [ "sts:AssumeRole" ] } ] }