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IoT平台软件：Google Cloud IoT二次开发_Node.jsSDK使用指南

时间：2024-10-18 22:19:26浏览次数：7  
标签：Node const projectId IoT registryId deviceId error 二次开发 your

Node.js SDK 使用指南

在本节中，我们将详细介绍如何使用 Google Cloud IoT Node.js SDK 进行二次开发。Google Cloud IoT 提供了丰富的 API 和 SDK，使得开发者可以轻松地与 IoT 设备进行交互，实现设备管理、数据传输、消息处理等功能。Node.js SDK 是其中一种常用的开发工具，特别适合于构建事件驱动的 IoT 应用程序。
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安装 Node.js SDK

在开始使用 Google Cloud IoT Node.js SDK 之前，首先需要安装 Node.js 和 npm（Node.js 包管理器）。你可以从 Node.js 官方网站 下载并安装最新版本的 Node.js。

安装完成后，打开终端或命令行工具，创建一个新的项目目录，并初始化 Node.js 项目：


mkdir iot-project

cd iot-project

npm init -y

接下来，安装 Google Cloud IoT Node.js SDK：


npm install @google-cloud/iot

配置 Google Cloud 项目

在使用 Google Cloud IoT SDK 之前，需要确保你的 Google Cloud 项目已经配置好，并且具有必要的权限。以下是配置步骤：

  1. 创建 Google Cloud 项目：

  2. 启用 Google Cloud IoT API：

    • 在 Google Cloud Console 中，导航到“API 和服务” > “库”。

    • 搜索“Cloud IoT API”并启用它。

  3. 创建服务账户并下载密钥文件：

    • 导航到“IAM 和管理” > “服务账户”。

    • 创建一个新的服务账户，并为其分配“Cloud IoT Admin”角色。

    • 生成一个 JSON 密钥文件并下载。

  4. 设置环境变量：

    • 在终端中设置 GOOGLE_APPLICATION_CREDENTIALS 环境变量，指向你下载的 JSON 密钥文件。
    
export GOOGLE_APPLICATION_CREDENTIALS="path/to/your/credentials.json"

连接设备

Google Cloud IoT 允许开发者通过 MQTT 或 HTTP 协议连接设备。在本节中，我们将介绍如何使用 Node.js SDK 通过 MQTT 协议连接设备。

创建设备注册

在 Google Cloud IoT 中，设备必须注册到一个设备注册表中。设备注册表可以包含多个设备，并且可以配置设备的连接和通信方式。

首先，安装 mqtt 模块：


npm install mqtt

然后，编写代码创建设备注册表：


const {IotClient} = require('@google-cloud/iot');



const projectId = 'your-project-id';

const cloudRegion = 'your-cloud-region';

const registryId = 'your-registry-id';



const iotClient = new IotClient();



async function createRegistry() {

  const parent = `projects/${projectId}/locations/${cloudRegion}`;

  const registry = {

    id: registryId,

    name: `${parent}/registries/${registryId}`,

    eventNotificationConfigs: [

      {

        pubsubTopicName: `projects/${projectId}/topics/your-topic`,

        subfolderMatches: 'your-subfolder',

      },

    ],

  };



  const [response] = await iotClient.createDeviceRegistry({parent, deviceRegistry: registry});

  console.log(`Registry ${registryId} created: ${response.name}`);

}



createRegistry().catch(console.error);

注册设备

创建设备注册表后，需要注册设备。每个设备都有一个唯一的 ID，并且可以配置其连接方式和凭证。


const {IotClient} = require('@google-cloud/iot');

const {MqttClient} = require('mqtt');



const projectId = 'your-project-id';

const cloudRegion = 'your-cloud-region';

const registryId = 'your-registry-id';

const deviceId = 'your-device-id';

const privateKeyFile = 'path/to/your/private-key.pem';

const algorithm = 'RS256';

const cloudIoTCoreMqttBridge = 'mqtt.googleapis.com';

const mqttBridgePort = 8883;



const iotClient = new IotClient();



async function registerDevice() {

  const parent = `projects/${projectId}/locations/${cloudRegion}/registries/${registryId}`;

  const device = {

    id: deviceId,

    credentials: [

      {

        publicKey: {

          format: 'RSA_X509_PEM',

          key: fs.readFileSync(privateKeyFile, 'utf8'),

        },

        expirationTime: '2023-12-31T23:59:59Z',

      },

    ],

  };



  const [response] = await iotClient.createDevice({parent, device});

  console.log(`Device ${deviceId} registered: ${response.name}`);

}



registerDevice().catch(console.error);

连接设备

使用 MQTT 协议连接设备时，需要配置 MQTT 客户端并进行身份验证。以下是一个示例代码，展示了如何连接设备并发送数据：


const {IotClient} = require('@google-cloud/iot');

const {MqttClient} = require('mqtt');

const fs = require('fs');

const path = require('path');



const projectId = 'your-project-id';

const cloudRegion = 'your-cloud-region';

const registryId = 'your-registry-id';

const deviceId = 'your-device-id';

const privateKeyFile = 'path/to/your/private-key.pem';

const algorithm = 'RS256';

const cloudIoTCoreMqttBridge = 'mqtt.googleapis.com';

const mqttBridgePort = 8883;



const iotClient = new IotClient();



async function getConnectionString() {

  const devicePath = iotClient.devicePath(projectId, cloudRegion, registryId, deviceId);

  const [device] = await iotClient.getDevice({name: devicePath});

  const jwtClientEmail = device.credentials[0].publicKey.key;

  const jwtPrivateKey = fs.readFileSync(privateKeyFile, 'utf8');



  const client = new MqttClient(`mqtts://${cloudIoTCoreMqttBridge}:${mqttBridgePort}`, {

    clientId: `projects/${projectId}/locations/${cloudRegion}/registries/${registryId}/devices/${deviceId}`,

    username: 'unused',

    password: createJwt(projectId, cloudRegion, registryId, deviceId, jwtClientEmail, jwtPrivateKey, algorithm),

    protocol: 'mqtts',

  });



  return client;

}



function createJwt(projectId, cloudRegion, registryId, deviceId, jwtClientEmail, jwtPrivateKey, algorithm) {

  const token = {

    iat: Math.floor(Date.now() / 1000),

    exp: Math.floor(Date.now() / 1000) + (20 * 60), // 20 minutes

    aud: projectId,

  };

  const encodedToken = Buffer.from(JSON.stringify(token)).toString('base64');

  const sign = crypto.createSign('RSA-SHA256');

  sign.write(encodedToken);

  sign.end();

  const signature = sign.sign(jwtPrivateKey, 'base64');

  return `${encodedToken}.${signature}`;

}



async function connectDevice() {

  const client = await getConnectionString();

  client.on('connect', () => {

    console.log('Device connected to Google Cloud IoT Core');

    client.publish(`projects/${projectId}/locations/${cloudRegion}/registries/${registryId}/devices/${deviceId}/events`, 'Hello, Cloud IoT Core!');

  });



  client.on('error', (error) => {

    console.error('Error connecting to Google Cloud IoT Core:', error);

  });



  client.connect();

}



connectDevice().catch(console.error);

发送和接收数据

发送数据

连接设备后，可以通过 MQTT 协议发送数据到 Google Cloud IoT Core。以下是一个示例代码，展示了如何发送温度传感器数据：


const {IotClient} = require('@google-cloud/iot');

const {MqttClient} = require('mqtt');

const fs = require('fs');

const crypto = require('crypto');



const projectId = 'your-project-id';

const cloudRegion = 'your-cloud-region';

const registryId = 'your-registry-id';

const deviceId = 'your-device-id';

const privateKeyFile = 'path/to/your/private-key.pem';

const algorithm = 'RS256';

const cloudIoTCoreMqttBridge = 'mqtt.googleapis.com';

const mqttBridgePort = 8883;



const iotClient = new IotClient();



async function getConnectionString() {

  const devicePath = iotClient.devicePath(projectId, cloudRegion, registryId, deviceId);

  const [device] = await iotClient.getDevice({name: devicePath});

  const jwtClientEmail = device.credentials[0].publicKey.key;

  const jwtPrivateKey = fs.readFileSync(privateKeyFile, 'utf8');



  const client = new MqttClient(`mqtts://${cloudIoTCoreMqttBridge}:${mqttBridgePort}`, {

    clientId: `projects/${projectId}/locations/${cloudRegion}/registries/${registryId}/devices/${deviceId}`,

    username: 'unused',

    password: createJwt(projectId, cloudRegion, registryId, deviceId, jwtClientEmail, jwtPrivateKey, algorithm),

    protocol: 'mqtts',

  });



  return client;

}



function createJwt(projectId, cloudRegion, registryId, deviceId, jwtClientEmail, jwtPrivateKey, algorithm) {

  const token = {

    iat: Math.floor(Date.now() / 1000),

    exp: Math.floor(Date.now() / 1000) + (20 * 60), // 20 minutes

    aud: projectId,

  };

  const encodedToken = Buffer.from(JSON.stringify(token)).toString('base64');

  const sign = crypto.createSign('RSA-SHA256');

  sign.write(encodedToken);

  sign.end();

  const signature = sign.sign(jwtPrivateKey, 'base64');

  return `${encodedToken}.${signature}`;

}



async function sendData() {

  const client = await getConnectionString();

  client.on('connect', () => {

    console.log('Device connected to Google Cloud IoT Core');

    const temperature = 25.0;

    const payload = JSON.stringify({temperature});

    const topic = `projects/${projectId}/locations/${cloudRegion}/registries/${registryId}/devices/${deviceId}/events`;

    client.publish(topic, payload, {qos: 1}, (error) => {

      if (error) {

        console.error('Error publishing data:', error);

      } else {

        console.log('Data sent to Google Cloud IoT Core:', payload);

      }

    });

  });



  client.on('error', (error) => {

    console.error('Error connecting to Google Cloud IoT Core:', error);

  });



  client.connect();

}



sendData().catch(console.error);

接收数据

设备不仅可以发送数据，还可以接收来自 Google Cloud IoT Core 的命令和配置。以下是一个示例代码，展示了如何接收命令：


const {IotClient} = require('@google-cloud/iot');

const {MqttClient} = require('mqtt');

const fs = require('fs');

const crypto = require('crypto');



const projectId = 'your-project-id';

const cloudRegion = 'your-cloud-region';

const registryId = 'your-registry-id';

const deviceId = 'your-device-id';

const privateKeyFile = 'path/to/your/private-key.pem';

const algorithm = 'RS256';

const cloudIoTCoreMqttBridge = 'mqtt.googleapis.com';

const mqttBridgePort = 8883;



const iotClient = new IotClient();



async function getConnectionString() {

  const devicePath = iotClient.devicePath(projectId, cloudRegion, registryId, deviceId);

  const [device] = await iotClient.getDevice({name: devicePath});

  const jwtClientEmail = device.credentials[0].publicKey.key;

  const jwtPrivateKey = fs.readFileSync(privateKeyFile, 'utf8');



  const client = new MqttClient(`mqtts://${cloudIoTCoreMqttBridge}:${mqttBridgePort}`, {

    clientId: `projects/${projectId}/locations/${cloudRegion}/registries/${registryId}/devices/${deviceId}`,

    username: 'unused',

    password: createJwt(projectId, cloudRegion, registryId, deviceId, jwtClientEmail, jwtPrivateKey, algorithm),

    protocol: 'mqtts',

  });



  return client;

}



function createJwt(projectId, cloudRegion, registryId, deviceId, jwtClientEmail, jwtPrivateKey, algorithm) {

  const token = {

    iat: Math.floor(Date.now() / 1000),

    exp: Math.floor(Date.now() / 1000) + (20 * 60), // 20 minutes

    aud: projectId,

  };

  const encodedToken = Buffer.from(JSON.stringify(token)).toString('base64');

  const sign = crypto.createSign('RSA-SHA256');

  sign.write(encodedToken);

  sign.end();

  const signature = sign.sign(jwtPrivateKey, 'base64');

  return `${encodedToken}.${signature}`;

}



async function receiveCommands() {

  const client = await getConnectionString();

  const topic = `projects/${projectId}/locations/${cloudRegion}/registries/${registryId}/devices/${deviceId}/commands/#`;



  client.on('connect', () => {

    console.log('Device connected to Google Cloud IoT Core');

    client.subscribe(topic, (error) => {

      if (error) {

        console.error('Error subscribing to commands:', error);

      } else {

        console.log('Subscribed to commands');

      }

    });

  });



  client.on('message', (topic, message) => {

    console.log('Received command:', topic, message.toString());

  });



  client.on('error', (error) => {

    console.error('Error connecting to Google Cloud IoT Core:', error);

  });



  client.connect();

}



receiveCommands().catch(console.error);

设备管理

获取设备信息

使用 Google Cloud IoT Node.js SDK，可以轻松获取设备的详细信息。以下是一个示例代码，展示了如何获取设备信息：


const {IotClient} = require('@google-cloud/iot');



const projectId = 'your-project-id';

const cloudRegion = 'your-cloud-region';

const registryId = 'your-registry-id';

const deviceId = 'your-device-id';



const iotClient = new IotClient();



async function getDevice() {

  const name = iotClient.devicePath(projectId, cloudRegion, registryId, deviceId);

  const [device] = await iotClient.getDevice({name});

  console.log('Device information:', device);

}



getDevice().catch(console.error);

更新设备配置

设备配置可以通过 Google Cloud IoT Core 进行更新。以下是一个示例代码，展示了如何更新设备配置：


const {IotClient} = require('@google-cloud/iot');



const projectId = 'your-project-id';

const cloudRegion = 'your-cloud-region';

const registryId = 'your-registry-id';

const deviceId = 'your-device-id';



const iotClient = new IotClient();



async function updateDeviceConfig() {

  const name = iotClient.devicePath(projectId, cloudRegion, registryId, deviceId);

  const config = {

    data: Buffer.from('{"newConfig": "value"}'),

    versionToUpdate: 0, // Set to 0 to update to the latest version

  };



  const [response] = await iotClient.modifyCloudToDeviceConfig({name, binaryData: config.data, versionToUpdate: config.versionToUpdate});

  console.log('Device configuration updated:', response);

}



updateDeviceConfig().catch(console.error);

删除设备

如果需要删除设备，可以使用以下代码：


const {IotClient} = require('@google-cloud/iot');



const projectId = 'your-project-id';

const cloudRegion = 'your-cloud-region';

const registryId = 'your-registry-id';

const deviceId = 'your-device-id';



const iotClient = new IotClient();



async function deleteDevice() {

  const name = iotClient.devicePath(projectId, cloudRegion, registryId, deviceId);

  await iotClient.deleteDevice({name});

  console.log('Device deleted:', deviceId);

}



deleteDevice().catch(console.error);

错误处理

在开发过程中，错误处理是非常重要的。Google Cloud IoT Node.js SDK 提供了多种方法来处理错误。以下是一些常见的错误处理示例：

处理设备连接错误

在连接设备时，可能会遇到各种错误，如网络问题、认证失败等。可以使用 error 事件来捕获这些错误：


const {IotClient} = require('@google-cloud/iot');

const {MqttClient} = require('mqtt');

const fs = require('fs');

const crypto = require('crypto');



const projectId = 'your-project-id';

const cloudRegion = 'your-cloud-region';

const registryId = 'your-registry-id';

const deviceId = 'your-device-id';

const privateKeyFile = 'path/to/your/private-key.pem';

const algorithm = 'RS256';

const cloudIoTCoreMqttBridge = 'mqtt.googleapis.com';

const mqttBridgePort = 8883;



const iotClient = new IotClient();



async function getConnectionString() {

  const devicePath = iotClient.devicePath(projectId, cloudRegion, registryId, deviceId);

  const [device] = await iotClient.getDevice({name: devicePath});

  const jwtClientEmail = device.credentials[0].publicKey.key;

  const jwtPrivateKey = fs.readFileSync(privateKeyFile, 'utf8');



  const client = new MqttClient(`mqtts://${cloudIoTCoreMqttBridge}:${mqttBridgePort}`, {

    clientId: `projects/${projectId}/locations/${cloudRegion}/registries/${registryId}/devices/${deviceId}`,

    username: 'unused',

    password: createJwt(projectId, cloudRegion, registryId, deviceId, jwtClientEmail, jwtPrivateKey, algorithm),

    protocol: 'mqtts',

  });



  return client;

}



function createJwt(projectId, cloudRegion, registryId, deviceId, jwtClientEmail, jwtPrivateKey, algorithm) {

  const token = {

    iat: Math.floor(Date.now() / 1000),

    exp: Math.floor(Date.now() / 1000) + (20 * 60), // 20 minutes

    aud: projectId,

  };

  const encodedToken = Buffer.from(JSON.stringify(token)).toString('base64');

  const sign = crypto.createSign('RSA-SHA256');

  sign.write(encodedToken);

  sign.end();

  const signature = sign.sign(jwtPrivateKey, 'base64');

  return `${encodedToken}.${signature}`;

}



async function connectDevice() {

  const client = await getConnectionString();

  client.on('connect', () => {

    console.log('Device connected to Google Cloud IoT Core');

  });



  client.on('error', (error) => {

    console.error('Error connecting to Google Cloud IoT Core:', error);

  });



  client.connect();

}



connectDevice().catch(console.error);

处理设备操作错误

在进行### 处理设备操作错误

在进行设备操作时，可能会遇到各种错误，如设备不存在、权限不足、网络问题等。可以使用 try-catch 语句来捕获这些错误，并进行相应的处理。以下是一些常见的设备操作错误处理示例：

获取设备信息时的错误处理

const {IotClient} = require('@google-cloud/iot');



const projectId = 'your-project-id';

const cloudRegion = 'your-cloud-region';

const registryId = 'your-registry-id';

const deviceId = 'your-device-id';



const iotClient = new IotClient();



async function getDevice() {

  try {

    const name = iotClient.devicePath(projectId, cloudRegion, registryId, deviceId);

    const [device] = await iotClient.getDevice({name});

    console.log('Device information:', device);

  } catch (error) {

    console.error('Error getting device information:', error);

  }

}



getDevice().catch(console.error);
更新设备配置时的错误处理

const {IotClient} = require('@google-cloud/iot');



const projectId = 'your-project-id';

const cloudRegion = 'your-cloud-region';

const registryId = 'your-registry-id';

const deviceId = 'your-device-id';



const iotClient = new IotClient();



async function updateDeviceConfig() {

  try {

    const name = iotClient.devicePath(projectId, cloudRegion, registryId, deviceId);

    const config = {

      data: Buffer.from('{"newConfig": "value"}'),

      versionToUpdate: 0, // Set to 0 to update to the latest version

    };



    const [response] = await iotClient.modifyCloudToDeviceConfig({name, binaryData: config.data, versionToUpdate: config.versionToUpdate});

    console.log('Device configuration updated:', response);

  } catch (error) {

    console.error('Error updating device configuration:', error);

  }

}



updateDeviceConfig().catch(console.error);
删除设备时的错误处理

const {IotClient} = require('@google-cloud/iot');



const projectId = 'your-project-id';

const cloudRegion = 'your-cloud-region';

const registryId = 'your-registry-id';

const deviceId = 'your-device-id';



const iotClient = new IotClient();



async function deleteDevice() {

  try {

    const name = iotClient.devicePath(projectId, cloudRegion, registryId, deviceId);

    await iotClient.deleteDevice({name});

    console.log('Device deleted:', deviceId);

  } catch (error) {

    console.error('Error deleting device:', error);

  }

}



deleteDevice().catch(console.error);

日志记录

在开发过程中，日志记录是非常重要的，可以帮助你调试和监控应用程序的运行情况。可以使用 winston 这样的日志库来记录日志。

首先，安装 winston：


npm install winston

然后，编写代码进行日志记录：


const {IotClient} = require('@google-cloud/iot');

const {MqttClient} = require('mqtt');

const fs = require('fs');

const crypto = require('crypto');

const winston = require('winston');



const projectId = 'your-project-id';

const cloudRegion = 'your-cloud-region';

const registryId = 'your-registry-id';

const deviceId = 'your-device-id';

const privateKeyFile = 'path/to/your/private-key.pem';

const algorithm = 'RS256';

const cloudIoTCoreMqttBridge = 'mqtt.googleapis.com';

const mqttBridgePort = 8883;



const iotClient = new IotClient();



// 创建日志记录器

const logger = winston.createLogger({

  level: 'info',

  format: winston.format.json(),

  transports: [

    new winston.transports.Console(),

    new winston.transports.File({ filename: 'iot.log' }),

  ],

});



async function getConnectionString() {

  const devicePath = iotClient.devicePath(projectId, cloudRegion, registryId, deviceId);

  const [device] = await iotClient.getDevice({name: devicePath});

  const jwtClientEmail = device.credentials[0].publicKey.key;

  const jwtPrivateKey = fs.readFileSync(privateKeyFile, 'utf8');



  const client = new MqttClient(`mqtts://${cloudIoTCoreMqttBridge}:${mqttBridgePort}`, {

    clientId: `projects/${projectId}/locations/${cloudRegion}/registries/${registryId}/devices/${deviceId}`,

    username: 'unused',

    password: createJwt(projectId, cloudRegion, registryId, deviceId, jwtClientEmail, jwtPrivateKey, algorithm),

    protocol: 'mqtts',

  });



  return client;

}



function createJwt(projectId, cloudRegion, registryId, deviceId, jwtClientEmail, jwtPrivateKey, algorithm) {

  const token = {

    iat: Math.floor(Date.now() / 1000),

    exp: Math.floor(Date.now() / 1000) + (20 * 60), // 20 minutes

    aud: projectId,

  };

  const encodedToken = Buffer.from(JSON.stringify(token)).toString('base64');

  const sign = crypto.createSign('RSA-SHA256');

  sign.write(encodedToken);

  sign.end();

  const signature = sign.sign(jwtPrivateKey, 'base64');

  return `${encodedToken}.${signature}`;

}



async function connectDevice() {

  try {

    const client = await getConnectionString();

    client.on('connect', () => {

      logger.info('Device connected to Google Cloud IoT Core');

    });



    client.on('error', (error) => {

      logger.error('Error connecting to Google Cloud IoT Core:', error);

    });



    client.connect();

  } catch (error) {

    logger.error('Error getting connection string:', error);

  }

}



connectDevice().catch(console.error);



async function sendData() {

  try {

    const client = await getConnectionString();

    client.on('connect', () => {

      logger.info('Device connected to Google Cloud IoT Core');

      const temperature = 25.0;

      const payload = JSON.stringify({temperature});

      const topic = `projects/${projectId}/locations/${cloudRegion}/registries/${registryId}/devices/${deviceId}/events`;

      client.publish(topic, payload, {qos: 1}, (error) => {

        if (error) {

          logger.error('Error publishing data:', error);

        } else {

          logger.info('Data sent to Google Cloud IoT Core:', payload);

        }

      });

    });



    client.on('error', (error) => {

      logger.error('Error connecting to Google Cloud IoT Core:', error);

    });



    client.connect();

  } catch (error) {

    logger.error('Error getting connection string:', error);

  }

}



sendData().catch(console.error);



async function receiveCommands() {

  try {

    const client = await getConnectionString();

    const topic = `projects/${projectId}/locations/${cloudRegion}/registries/${registryId}/devices/${deviceId}/commands/#`;



    client.on('connect', () => {

      logger.info('Device connected to Google Cloud IoT Core');

      client.subscribe(topic, (error) => {

        if (error) {

          logger.error('Error subscribing to commands:', error);

        } else {

          logger.info('Subscribed to commands');

        }

      });

    });



    client.on('message', (topic, message) => {

      logger.info('Received command:', topic, message.toString());

    });



    client.on('error', (error) => {

      logger.error('Error connecting to Google Cloud IoT Core:', error);

    });



    client.connect();

  } catch (error) {

    logger.error('Error getting connection string:', error);

  }

}



receiveCommands().catch(console.error);



async function getDevice() {

  try {

    const name = iotClient.devicePath(projectId, cloudRegion, registryId, deviceId);

    const [device] = await iotClient.getDevice({name});

    logger.info('Device information:', device);

  } catch (error) {

    logger.error('Error getting device information:', error);

  }

}



getDevice().catch(console.error);



async function updateDeviceConfig() {

  try {

    const name = iotClient.devicePath(projectId, cloudRegion, registryId, deviceId);

    const config = {

      data: Buffer.from('{"newConfig": "value"}'),

      versionToUpdate: 0, // Set to 0 to update to the latest version

    };



    const [response] = await iotClient.modifyCloudToDeviceConfig({name, binaryData: config.data, versionToUpdate: config.versionToUpdate});

    logger.info('Device configuration updated:', response);

  } catch (error) {

    logger.error('Error updating device configuration:', error);

  }

}



updateDeviceConfig().catch(console.error);



async function deleteDevice() {

  try {

    const name = iotClient.devicePath(projectId, cloudRegion, registryId, deviceId);

    await iotClient.deleteDevice({name});

    logger.info('Device deleted:', deviceId);

  } catch (error) {

    logger.error('Error deleting device:', error);

  }

}



deleteDevice().catch(console.error);

总结

通过本指南，你已经了解了如何使用 Google Cloud IoT Node.js SDK 进行设备的注册、连接、数据发送和接收，以及设备管理。错误处理和日志记录是确保应用程序稳定运行的重要部分，希望这些示例能帮助你更好地开发和调试你的 IoT 应用程序。

如果你有任何问题或需要进一步的帮助，可以参考 Google Cloud IoT 官方文档 或访问 Google Cloud Support。

标签：Node,const,projectId,IoT,registryId,deviceId,error,二次开发,your
From： https://blog.csdn.net/chenlz2007/article/details/143027064

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