更新时间:2023-12-27 GMT+08:00
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下发设备命令

功能介绍

设备的产品模型中定义了物联网平台可向设备下发的命令,应用服务器可调用此接口向指定设备下发命令,以实现对设备的同步控制。平台负责将命令以同步方式发送给设备,并将设备执行命令结果同步返回, 如果设备没有响应,平台会返回给应用服务器超时,平台超时时间是20秒。如果命令下发需要超过20秒,建议采用消息下发。 注意:

  • 此接口适用于MQTT设备同步命令下发,暂不支持NB-IoT设备命令下发。

  • 此接口仅支持单个设备同步命令下发,如需多个设备同步命令下发,请参见 创建批量任务

调用方法

请参见如何调用API

URI

POST /v5/iot/{project_id}/devices/{device_id}/commands

表1 路径参数

参数

是否必选

参数类型

描述

project_id

String

参数说明:项目ID。获取方法请参见 获取项目ID

device_id

String

参数说明:下发消息的设备ID,用于唯一标识一个设备,在注册设备时由物联网平台分配获得。 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

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

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

service_id

String

参数说明:设备命令所属的设备服务ID,在设备关联的产品模型中定义。 取值范围:长度不超过64的字符串。

最大长度:64

command_name

String

参数说明:设备命令名称,在设备关联的产品模型中定义。 取值范围:长度不超过128的字符串。

最大长度:128

paras

Object

参数说明:设备执行的命令,Json格式,里面是一个个键值对,如果serviceId不为空,每个键都是profile中命令的参数名(paraName);如果serviceId为空则由用户自定义命令格式。设备命令示例:{"value":"1"},具体格式需要应用和设备约定。此参数仅支持Json格式,暂不支持字符串。

最大长度:261952

响应参数

状态码: 200

表4 响应Body参数

参数

参数类型

描述

command_id

String

设备命令ID,用于唯一标识一条命令,在下发设备命令时由物联网平台分配获得。

response

Object

设备上报的命令执行结果。Json格式,具体格式需要应用和设备约定。

error_code

String

命令下发异常错误码。

error_msg

String

命令下发异常错误信息。

请求示例

创建命令,命令名为ON_OFF,命令为ON。

POST https://{endpoint}/v5/iot/{project_id}/devices/{device_id}/commands

{
  "service_id" : "reboot",
  "command_name" : "ON_OFF",
  "paras" : {
    "value" : "ON"
  }
}

响应示例

状态码: 200

OK

{
  "command_id" : "b1224afb-e9f0-4916-8220-b6bab568e888",
  "response" : {
    "result_code" : 0,
    "response_name" : "COMMAND_RESPONSE",
    "paras" : {
      "result" : "success"
    }
  }
}

SDK代码示例

SDK代码示例如下。

创建命令,命令名为ON_OFF,命令为ON。

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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.iotda.v5.region.IoTDARegion;
import com.huaweicloud.sdk.iotda.v5.*;
import com.huaweicloud.sdk.iotda.v5.model.*;


public class CreateCommandSolution {

    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");

        ICredential auth = new BasicCredentials()
                .withDerivedPredicate(AbstractCredentials.DEFAULT_DERIVED_PREDICATE) // Used in derivative ak/sk authentication scenarios
                .withAk(ak)
                .withSk(sk);

        IoTDAClient client = IoTDAClient.newBuilder()
                .withCredential(auth)
                .withRegion(IoTDARegion.valueOf("<YOUR REGION>"))
                .build();
        CreateCommandRequest request = new CreateCommandRequest();
        DeviceCommandRequest body = new DeviceCommandRequest();
        body.withParas("{\"value\":\"ON\"}");
        body.withCommandName("ON_OFF");
        body.withServiceId("reboot");
        request.withBody(body);
        try {
            CreateCommandResponse response = client.createCommand(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());
        }
    }
}

创建命令,命令名为ON_OFF,命令为ON。

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# coding: utf-8

from huaweicloudsdkcore.auth.credentials import BasicCredentials
from huaweicloudsdkcore.auth.credentials import DerivedCredentials
from huaweicloudsdkiotda.v5.region.iotda_region import IoTDARegion
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.getenv("CLOUD_SDK_AK")
    sk = os.getenv("CLOUD_SDK_SK")

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

    client = IoTDAClient.new_builder() \
        .with_credentials(credentials) \
        .with_region(IoTDARegion.value_of("<YOUR REGION>")) \
        .build()

    try:
        request = CreateCommandRequest()
        request.body = DeviceCommandRequest(
            paras="{\"value\":\"ON\"}",
            command_name="ON_OFF",
            service_id="reboot"
        )
        response = client.create_command(request)
        print(response)
    except exceptions.ClientRequestException as e:
        print(e.status_code)
        print(e.request_id)
        print(e.error_code)
        print(e.error_msg)

创建命令,命令名为ON_OFF,命令为ON。

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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/services/iotda/v5/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")

    auth := basic.NewCredentialsBuilder().
        WithAk(ak).
        WithSk(sk).
        WithDerivedPredicate(core_auth.GetDefaultDerivedPredicate()). // Used in derivative ak/sk authentication scenarios
        Build()

    client := iotda.NewIoTDAClient(
        iotda.IoTDAClientBuilder().
            WithRegion(region.ValueOf("<YOUR REGION>")).
            WithCredential(auth).
            Build())

    request := &model.CreateCommandRequest{}
	var parasDeviceCommandRequest interface{} = "{\"value\":\"ON\"}"
	commandNameDeviceCommandRequest:= "ON_OFF"
	serviceIdDeviceCommandRequest:= "reboot"
	request.Body = &model.DeviceCommandRequest{
		Paras: &parasDeviceCommandRequest,
		CommandName: &commandNameDeviceCommandRequest,
		ServiceId: &serviceIdDeviceCommandRequest,
	}
	response, err := client.CreateCommand(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

403

Forbidden

404

Not Found

500

Internal Server Error

错误码

请参见错误码

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