文档首页/ 设备接入 IoTDA/ API参考/ 应用侧API参考/ API/ 设备影子/ 配置设备影子预期数据
更新时间：2024-07-02 GMT+08:00
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配置设备影子预期数据

功能介绍

应用服务器可调用此接口配置设备影子的预期属性（desired区），当设备上线或者设备上报属性时把属性下发给设备。

设备影子介绍： 设备影子是一个用于存储和检索设备当前状态信息的JSON文档。

  • 每个设备有且只有一个设备影子，由设备ID唯一标识

  • 设备影子用于存储设备上报的(状态)属性和应用程序期望的设备(状态)属性

  • 无论该设备是否在线，都可以通过该影子获取和设置设备的属性

  • 设备上线或者设备上报属性时，如果desired区和reported区存在差异，则将差异部分下发给设备，配置的预期属性需在产品模型中定义且method具有可写属性“W”才可下发

  • 该接口仅支持配置单个设备的设备影子的预期数据，如需多个设备的设备影子配置，请参见 创建批量任务。

限制： 设备影子JSON文档中的key不允许特殊字符：点(.)、dollar符号($)、空char(十六进制的ASCII码为00)。如果包含了以上特殊字符则无法正常刷新影子文档。

调用方法

请参见如何调用API。

URI

PUT /v5/iot/{project_id}/devices/{device_id}/shadow

表1 路径参数

参数

是否必选

参数类型

描述

project_id

是

String

参数说明：项目ID。获取方法请参见 获取项目ID 。

device_id

是

String

参数说明：设备ID，用于唯一标识一个设备。在注册设备时直接指定，或者由物联网平台分配获得。由物联网平台分配时，生成规则为"product_id" + "" + "node_id"拼接而成。 取值范围：长度不超过128，只允许字母、数字、下划线（）、连接符（-）的组合。

请求参数

表2 请求Header参数

参数

是否必选

参数类型

描述

X-Auth-Token

否

String

参数说明：用户Token。通过调用IAM服务 获取IAM用户Token接口获取，接口返回的响应消息头中“X-Subject-Token”就是需要获取的用户Token。简要的获取方法样例请参见 Token认证。

Instance-Id

否

String

参数说明：实例ID。物理多租下各实例的唯一标识，建议携带该参数，在使用专业版时必须携带该参数。您可以在IoTDA管理控制台界面，选择左侧导航栏“总览”页签查看当前实例的ID，具体获取方式请参考查看实例详情 。
表3 请求Body参数

参数

是否必选

参数类型

描述

shadow

否

Array of UpdateDesired objects

参数说明：设备影子期望值构体。
表4 UpdateDesired

参数

是否必选

参数类型

描述

service_id

是

String

参数说明：设备的服务ID，在设备关联的产品模型中定义。

最小长度：1

最大长度：256

desired

是

Object

参数说明：设备影子期望属性数据，Json格式，里面是一个个键值对，每个键都是产品模型中属性的参数名(property_name)，目前如样例所示只支持一层结构；如果想要删除整个desired可以填写空Object(例如"desired":{})，如果想要删除某一个属性期望值可以将属性置位null(例如{"temperature":null})

version

否

Long

参数说明：设备影子的版本，携带该参数时平台会校验值必须等于当前影子版本，初始从0开始。

响应参数

状态码： 200

表5 响应Body参数

参数

参数类型

描述

device_id

String

设备ID，用于唯一标识一个设备。在注册设备时直接指定，或者由物联网平台分配获得。由物联网平台分配时，生成规则为"product_id" + "_" + "node_id"拼接而成。

shadow

Array of DeviceShadowData objects

设备影子数据结构体。
表6 DeviceShadowData

参数

参数类型

描述

service_id

String

设备的服务ID，在设备关联的产品模型中定义。

最小长度：1

最大长度：256

desired

DeviceShadowProperties object

用户最近一次对设备下发的预期数据，Json格式，里面是一个个键值对，每个键都是产品模型中属性的参数名(property_name)。

reported

DeviceShadowProperties object

设备最近一次上报的属性数据，Json格式，里面是一个个键值对，每个键都是产品模型中属性的参数名(property_name)。

version

Long

设备影子的版本，携带该参数时平台会校验值必须等于当前影子版本，初始从0开始。
表7 DeviceShadowProperties

参数

参数类型

描述

properties

Object

设备影子的属性数据，Json格式，里面是一个个键值对，每个键都是产品模型中属性的参数名(property_name)，目前如样例所示只支持一层结构。 注意：JSON结构的key当前不支持特殊字符：点(.)、dollar符号($)、空char(十六进制的ASCII码为00),key为以上特殊字符无法正常刷新设备影子

event_time

String

事件操作时间，格式：yyyyMMdd'T'HHmmss'Z'，如20151212T121212Z。

最大长度：256

请求示例

  • 配置设备影子预期数据，temperature的期望值为60。

    PUT https://{endpoint}/v5/iot/{project_id}/devices/{device_id}/shadow

{
  "shadow" : [ {
    "service_id" : "WaterMeter",
    "desired" : {
      "temperature" : "60"
    },
    "version" : 1
  } ]
}

  • 删除设备影子预期数据，将设备影子中属性temperature的期望值删除。

    PUT https://{endpoint}/v5/iot/{project_id}/devices/{device_id}/shadow

{
  "shadow" : [ {
    "service_id" : "WaterMeter",
    "desired" : {
      "temperature" : null
    },
    "version" : 2
  } ]
}

响应示例

状态码： 200

OK

{
  "device_id" : "40fe3542-f4cc-4b6a-98c3-61a49ba1acd4",
  "shadow" : [ {
    "service_id" : "WaterMeter",
    "desired" : {
      "properties" : {
        "temperature" : "60"
      },
      "event_time" : "20151212T121212Z"
    },
    "reported" : {
      "properties" : {
        "temperature" : "60"
      },
      "event_time" : "20151212T121212Z"
    },
    "version" : 2
  } ]
}

SDK代码示例

SDK代码示例如下。

  • 配置设备影子预期数据，temperature的期望值为60。

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    package com.huaweicloud.sdk.test;

import com.huaweicloud.sdk.core.auth.ICredential;
import com.huaweicloud.sdk.core.auth.AbstractCredentials;
import com.huaweicloud.sdk.core.auth.BasicCredentials;
import com.huaweicloud.sdk.core.exception.ConnectionException;
import com.huaweicloud.sdk.core.exception.RequestTimeoutException;
import com.huaweicloud.sdk.core.exception.ServiceResponseException;
import com.huaweicloud.sdk.core.region.Region;
import com.huaweicloud.sdk.iotda.v5.*;
import com.huaweicloud.sdk.iotda.v5.model.*;

import java.util.List;
import java.util.ArrayList;

public class UpdateDeviceShadowDesiredDataSolution {

    public static void main(String[] args) {
        // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
        // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
        String ak = System.getenv("CLOUD_SDK_AK");
        String sk = System.getenv("CLOUD_SDK_SK");
        // ENDPOINT：请在控制台的"总览"界面的"平台接入地址"中查看“应用侧”的https接入地址。
        String iotdaEndpoint = "<YOUR ENDPOINT>";

        ICredential auth = new BasicCredentials()
                // 标准版/企业版需要使用衍生算法，基础版请删除配置"withDerivedPredicate";
                .withDerivedPredicate(AbstractCredentials.DEFAULT_DERIVED_PREDICATE) // Used in derivative ak/sk authentication scenarios
                .withAk(ak)
                .withSk(sk);

        IoTDAClient client = IoTDAClient.newBuilder()
                .withCredential(auth)
                // 标准版/企业版：需自行创建Region对象，基础版：请使用IoTDARegion的region对象，如"withRegion(IoTDARegion.CN_NORTH_4)"
                .withRegion(new Region("cn-north-4", iotdaEndpoint))
                .build();
        UpdateDeviceShadowDesiredDataRequest request = new UpdateDeviceShadowDesiredDataRequest();
        UpdateDesireds body = new UpdateDesireds();
        List<UpdateDesired> listbodyShadow = new ArrayList<>();
        listbodyShadow.add(
            new UpdateDesired()
                .withServiceId("WaterMeter")
                .withDesired("{\"temperature\":\"60\"}")
                .withVersion(1L)
        );
        body.withShadow(listbodyShadow);
        request.withBody(body);
        try {
            UpdateDeviceShadowDesiredDataResponse response = client.updateDeviceShadowDesiredData(request);
            System.out.println(response.toString());
        } catch (ConnectionException e) {
            e.printStackTrace();
        } catch (RequestTimeoutException e) {
            e.printStackTrace();
        } catch (ServiceResponseException e) {
            e.printStackTrace();
            System.out.println(e.getHttpStatusCode());
            System.out.println(e.getRequestId());
            System.out.println(e.getErrorCode());
            System.out.println(e.getErrorMsg());
        }
    }
}

  • 删除设备影子预期数据，将设备影子中属性temperature的期望值删除。

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    package com.huaweicloud.sdk.test;

import com.huaweicloud.sdk.core.auth.ICredential;
import com.huaweicloud.sdk.core.auth.AbstractCredentials;
import com.huaweicloud.sdk.core.auth.BasicCredentials;
import com.huaweicloud.sdk.core.exception.ConnectionException;
import com.huaweicloud.sdk.core.exception.RequestTimeoutException;
import com.huaweicloud.sdk.core.exception.ServiceResponseException;
import com.huaweicloud.sdk.core.region.Region;
import com.huaweicloud.sdk.iotda.v5.*;
import com.huaweicloud.sdk.iotda.v5.model.*;

import java.util.List;
import java.util.ArrayList;

public class UpdateDeviceShadowDesiredDataSolution {

    public static void main(String[] args) {
        // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
        // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
        String ak = System.getenv("CLOUD_SDK_AK");
        String sk = System.getenv("CLOUD_SDK_SK");
        // ENDPOINT：请在控制台的"总览"界面的"平台接入地址"中查看“应用侧”的https接入地址。
        String iotdaEndpoint = "<YOUR ENDPOINT>";

        ICredential auth = new BasicCredentials()
                // 标准版/企业版需要使用衍生算法，基础版请删除配置"withDerivedPredicate";
                .withDerivedPredicate(AbstractCredentials.DEFAULT_DERIVED_PREDICATE) // Used in derivative ak/sk authentication scenarios
                .withAk(ak)
                .withSk(sk);

        IoTDAClient client = IoTDAClient.newBuilder()
                .withCredential(auth)
                // 标准版/企业版：需自行创建Region对象，基础版：请使用IoTDARegion的region对象，如"withRegion(IoTDARegion.CN_NORTH_4)"
                .withRegion(new Region("cn-north-4", iotdaEndpoint))
                .build();
        UpdateDeviceShadowDesiredDataRequest request = new UpdateDeviceShadowDesiredDataRequest();
        UpdateDesireds body = new UpdateDesireds();
        List<UpdateDesired> listbodyShadow = new ArrayList<>();
        listbodyShadow.add(
            new UpdateDesired()
                .withServiceId("WaterMeter")
                .withDesired(new Object())
                .withVersion(2L)
        );
        body.withShadow(listbodyShadow);
        request.withBody(body);
        try {
            UpdateDeviceShadowDesiredDataResponse response = client.updateDeviceShadowDesiredData(request);
            System.out.println(response.toString());
        } catch (ConnectionException e) {
            e.printStackTrace();
        } catch (RequestTimeoutException e) {
            e.printStackTrace();
        } catch (ServiceResponseException e) {
            e.printStackTrace();
            System.out.println(e.getHttpStatusCode());
            System.out.println(e.getRequestId());
            System.out.println(e.getErrorCode());
            System.out.println(e.getErrorMsg());
        }
    }
}

  • 配置设备影子预期数据，temperature的期望值为60。

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    # coding: utf-8

import os
from huaweicloudsdkcore.auth.credentials import BasicCredentials
from huaweicloudsdkcore.auth.credentials import DerivedCredentials
from huaweicloudsdkcore.region.region import Region as coreRegion
from huaweicloudsdkcore.exceptions import exceptions
from huaweicloudsdkiotda.v5 import *

if __name__ == "__main__":
    # The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
    # In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
    ak = os.environ["CLOUD_SDK_AK"]
    sk = os.environ["CLOUD_SDK_SK"]
    // ENDPOINT：请在控制台的"总览"界面的"平台接入地址"中查看“应用侧”的https接入地址。
    iotdaEndpoint = "<YOUR ENDPOINT>";

    credentials = BasicCredentials(ak, sk).with_derived_predicate(DerivedCredentials.get_default_derived_predicate())

    client = IoTDAClient.new_builder() \
        .with_credentials(credentials) \
        # 标准版/企业版：需要使用自行创建的Region对象，基础版：请选择IoTDAClient中的Region对象 如： .with_region(IoTDARegion.CN_NORTH_4)
        .with_region(coreRegion(id="cn-north-4", endpoint=endpoint)) \
        .build()

    try:
        request = UpdateDeviceShadowDesiredDataRequest()
        listShadowbody = [
            UpdateDesired(
                service_id="WaterMeter",
                desired="{\"temperature\":\"60\"}",
                version=1
            )
        ]
        request.body = UpdateDesireds(
            shadow=listShadowbody
        )
        response = client.update_device_shadow_desired_data(request)
        print(response)
    except exceptions.ClientRequestException as e:
        print(e.status_code)
        print(e.request_id)
        print(e.error_code)
        print(e.error_msg)

  • 删除设备影子预期数据，将设备影子中属性temperature的期望值删除。

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    # coding: utf-8

import os
from huaweicloudsdkcore.auth.credentials import BasicCredentials
from huaweicloudsdkcore.auth.credentials import DerivedCredentials
from huaweicloudsdkcore.region.region import Region as coreRegion
from huaweicloudsdkcore.exceptions import exceptions
from huaweicloudsdkiotda.v5 import *

if __name__ == "__main__":
    # The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
    # In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
    ak = os.environ["CLOUD_SDK_AK"]
    sk = os.environ["CLOUD_SDK_SK"]
    // ENDPOINT：请在控制台的"总览"界面的"平台接入地址"中查看“应用侧”的https接入地址。
    iotdaEndpoint = "<YOUR ENDPOINT>";

    credentials = BasicCredentials(ak, sk).with_derived_predicate(DerivedCredentials.get_default_derived_predicate())

    client = IoTDAClient.new_builder() \
        .with_credentials(credentials) \
        # 标准版/企业版：需要使用自行创建的Region对象，基础版：请选择IoTDAClient中的Region对象 如： .with_region(IoTDARegion.CN_NORTH_4)
        .with_region(coreRegion(id="cn-north-4", endpoint=endpoint)) \
        .build()

    try:
        request = UpdateDeviceShadowDesiredDataRequest()
        listShadowbody = [
            UpdateDesired(
                service_id="WaterMeter",
                desired={},
                version=2
            )
        ]
        request.body = UpdateDesireds(
            shadow=listShadowbody
        )
        response = client.update_device_shadow_desired_data(request)
        print(response)
    except exceptions.ClientRequestException as e:
        print(e.status_code)
        print(e.request_id)
        print(e.error_code)
        print(e.error_msg)

  • 配置设备影子预期数据，temperature的期望值为60。

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    package main

import (
	"fmt"
	"github.com/huaweicloud/huaweicloud-sdk-go-v3/core/auth/basic"
    iotda "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/iotda/v5"
	"github.com/huaweicloud/huaweicloud-sdk-go-v3/services/iotda/v5/model"
    region "github.com/huaweicloud/huaweicloud-sdk-go-v3/core/region"
    core_auth "github.com/huaweicloud/huaweicloud-sdk-go-v3/core/auth"
)

func main() {
    // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
    // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
    ak := os.Getenv("CLOUD_SDK_AK")
    sk := os.Getenv("CLOUD_SDK_SK")
    // endpoint：请在控制台的"总览"界面的"平台接入地址"中查看"应用侧"的https接入地址
    endpoint := "<YOUR ENDPOINT>"

    auth := basic.NewCredentialsBuilder().
        WithAk(ak).
        WithSk(sk).
        // 企业版/标准版需要使用衍生算法，基础版请删除该配置"WithDerivedPredicate"
        WithDerivedPredicate(core_auth.GetDefaultDerivedPredicate()). // Used in derivative ak/sk authentication scenarios
        Build()

    client := iotda.NewIoTDAClient(
        iotda.IoTDAClientBuilder().
            // 标准版/企业版需要自行创建region，基础版使用IoTDARegion中的region对象
            WithRegion(region.NewRegion("cn-north-4", endpoint)).
            WithCredential(auth).
            Build())

    request := &model.UpdateDeviceShadowDesiredDataRequest{}
	desiredShadow:= "{\"temperature\":\"60\"}"
	var desiredShadowInterface interface{} = desiredShadow
	versionShadow:= int64(1)
	var listShadowbody = []model.UpdateDesired{
        {
            ServiceId: "WaterMeter",
            Desired: &desiredShadowInterface,
            Version: &versionShadow,
        },
    }
	request.Body = &model.UpdateDesireds{
		Shadow: &listShadowbody,
	}
	response, err := client.UpdateDeviceShadowDesiredData(request)
	if err == nil {
        fmt.Printf("%+v\n", response)
    } else {
        fmt.Println(err)
    }
}

  • 删除设备影子预期数据，将设备影子中属性temperature的期望值删除。

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    package main

import (
	"fmt"
	"github.com/huaweicloud/huaweicloud-sdk-go-v3/core/auth/basic"
    iotda "github.com/huaweicloud/huaweicloud-sdk-go-v3/services/iotda/v5"
	"github.com/huaweicloud/huaweicloud-sdk-go-v3/services/iotda/v5/model"
    region "github.com/huaweicloud/huaweicloud-sdk-go-v3/core/region"
    core_auth "github.com/huaweicloud/huaweicloud-sdk-go-v3/core/auth"
)

func main() {
    // The AK and SK used for authentication are hard-coded or stored in plaintext, which has great security risks. It is recommended that the AK and SK be stored in ciphertext in configuration files or environment variables and decrypted during use to ensure security.
    // In this example, AK and SK are stored in environment variables for authentication. Before running this example, set environment variables CLOUD_SDK_AK and CLOUD_SDK_SK in the local environment
    ak := os.Getenv("CLOUD_SDK_AK")
    sk := os.Getenv("CLOUD_SDK_SK")
    // endpoint：请在控制台的"总览"界面的"平台接入地址"中查看"应用侧"的https接入地址
    endpoint := "<YOUR ENDPOINT>"

    auth := basic.NewCredentialsBuilder().
        WithAk(ak).
        WithSk(sk).
        // 企业版/标准版需要使用衍生算法，基础版请删除该配置"WithDerivedPredicate"
        WithDerivedPredicate(core_auth.GetDefaultDerivedPredicate()). // Used in derivative ak/sk authentication scenarios
        Build()

    client := iotda.NewIoTDAClient(
        iotda.IoTDAClientBuilder().
            // 标准版/企业版需要自行创建region，基础版使用IoTDARegion中的region对象
            WithRegion(region.NewRegion("cn-north-4", endpoint)).
            WithCredential(auth).
            Build())

    request := &model.UpdateDeviceShadowDesiredDataRequest{}
	desiredShadow:= make(map[string]string)
	var desiredShadowInterface interface{} = desiredShadow
	versionShadow:= int64(2)
	var listShadowbody = []model.UpdateDesired{
        {
            ServiceId: "WaterMeter",
            Desired: &desiredShadowInterface,
            Version: &versionShadow,
        },
    }
	request.Body = &model.UpdateDesireds{
		Shadow: &listShadowbody,
	}
	response, err := client.UpdateDeviceShadowDesiredData(request)
	if err == nil {
        fmt.Printf("%+v\n", response)
    } else {
        fmt.Println(err)
    }
}

更多编程语言的SDK代码示例，请参见API Explorer的代码示例页签，可生成自动对应的SDK代码示例。

状态码

状态码

描述

200

OK

400

Bad Request

401

Unauthorized

403

FORBIDDEN

404

Not Found

409

CONFLICT

500

INTERNAL SERVER ERROR

错误码

请参见错误码。

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