npm 串口获取输出以反应组件

Question

我正在开发一个称重应用程序，它读取串口数据并显示在客户端上。我得到了读取串口的NodeJS脚本，

我的 serial.js ，这让我从我的称重机中得到了一个流的重量

const SerialPort = require("serialport");
const ReadLine = SerialPort.parsers.Readline;

//Defining the Serial port
var port  = new SerialPort("COM1", {
    baudRate:9600,
});

//the serial port parser
const parser = new ReadLine();
port.pipe(parser);

//read data from serial port
parser.on("data", (line) => console.log(line));

如何将此脚本的输出发送到我的后续 React 组件？

<Input
id="weight"
element="textarea"
type="textarea"
label="Weight"
onInput={inputHandler}
/>

我需要采取哪些步骤才能使其在线运行？我听说过 websockets。请把我引向正确的方向。

Answer 1

** 这是一个简单的代码，需要完成它**

服务器端（Nodejs）：

var express = require('express'),
    app = express(),
    server = require('http').Server(app),
    io = require('socket.io')(server),
    port = 8888;

//Server start
server.listen(port, () => console.log('on port' + port))

//user server
app.use(express.static(__dirname + '/public'));

io.on('connection', onConnection);

var connectedSocket = null;
function onConnection(socket){
    connectedSocket = socket;
}


const SerialPort = require('serialport');
const Readline = SerialPort.parsers.Readline; 
const usbport = new SerialPort('COM4');  
const parser = usbport.pipe(new Readline()); 
parser.on('data', function (data) {
    io.emit('serialdata', { data: data });
});

客户端（反应）：

import React from "react";
import io from 'socket.io-client';

class App extends React.Component {
  constructor(props) {
    super(props);
    this.socket = null;
  }

  componentDidMount() {
    this.socket = io('http://localhost:8888');
    //this.socket.open();
    this.socket.on('serialdata', (data) => {
      // we get settings data and can do something with it
      this.setState({
        settings: data,
      })
    });
  }

  componentWillUnmount() {
    this.socket.close();
  }

  render() {
    ...
  }
}

npm 串口获取输出以反应组件

npm serial-port get the output to react component

serial-port

node.js

npm

socket.io

reactjs