如何在React Native App中使用Node.js代码 [英] How to use Node.js code in React Native App

问题描述

我有一个Node.js代码，该代码连接到Azure's IoT Hub并将消息发送到集线器.这是代码:

I have a Node.js code that connects to Azure's IoT Huband sends messages to the hub. Here is the code:

'use strict';

var connectionString = 'connectionString';

// Using the Node.js Device SDK for IoT Hub:
//   https://github.com/Azure/azure-iot-sdk-node
// The sample connects to a device-specific MQTT endpoint on your IoT Hub.
var Mqtt = require('azure-iot-device-mqtt').Mqtt;
var DeviceClient = require('azure-iot-device').Client
var Message = require('azure-iot-device').Message;

var client = DeviceClient.fromConnectionString(connectionString, Mqtt);

// Create a message and send it to the IoT hub every second
setInterval(function(){
  // Simulate telemetry.
  var temperature = 20 + (Math.random() * 15);
  var message = new Message(JSON.stringify({
    temperature: temperature,
    humidity: 60 + (Math.random() * 20)
  }));

  // Add a custom application property to the message.
  // An IoT hub can filter on these properties without access to the message body.
  message.properties.add('temperatureAlert', (temperature > 30) ? 'true' : 'false');

  console.log('Sending message: ' + message.getData());

  // Send the message.
  client.sendEvent(message, function (err) {
    if (err) {
      console.error('send error: ' + err.toString());
    } else {
      console.log('message sent');
    }
  });
}, 1000);

我有一个带有按钮的React Native应用程序，我想每次按下按钮时使用Node.js文件将消息发送到IoT中心.我如何在我的React Native文件中包含该文件?请帮忙，谢谢.

I have a React Native app that has a button and I want to send a message using the Node.js file to the IoT Hub every time I press the button. How do I include the file within my React Native file? Please help, thanks.

推荐答案

Azure IoT中心设备SDK需要一个Node.js运行时，该运行时在React Native应用程序中不存在.

The Azure IoT Hub Device SDK needs a Node.js runtime, which does not exists within the React Native app.

有一个名为 nodejs-mobile-react-native 的插件React Native引入了Node.js运行时，并允许您与React Native应用程序一起运行Node.js应用程序.

There is a plugin called nodejs-mobile-react-native for React Native that brings in the Node.js runtime and enables you to run Node.js apps alongside your React Native application.

我写了有关该主题的详细博客文章，概述了实现此目标所需的步骤.

I have written a detailed blog post about this topic outlining the steps necessary to achieve this.

这篇关于如何在React Native App中使用Node.js代码的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！