智慧建筑运营系统如何搭建

// 示例代码：React组件
import React, { useState, useEffect } from 'react';

function Dashboard() {
  const [data, setData] = useState([]);

  useEffect(() => {
    fetch('/api/data')
      .then(response => response.json())
      .then(data => setData(data));
  }, []);

  return (
    <div>
      <h1>智慧建筑运营系统</h1>
      <ul>
        {data.map(item => (
          <li key={item.id}>{item.name}: {item.value}</li>
        ))}
      </ul>
    </div>
  );
}

export default Dashboard;

// 示例代码：Node.js服务器
const express = require('express');
const app = express();
const port = 3000;

app.get('/api/data', (req, res) => {
  const data = [
    { id: 1, name: '温度', value: 22 },
    { id: 2, name: '湿度', value: 45 },
    // 其他数据...
  ];
  res.json(data);
});

app.listen(port, () => {
  console.log(`Server running at http://localhost:${port}/`);
});

// 示例代码：MongoDB连接
const { MongoClient } = require('mongodb');

async function main() {
  const uri = "your_mongodb_connection_string";
  const client = new MongoClient(uri);

  try {
    await client.connect();
    const database = client.db('smartbuilding');
    const collection = database.collection('sensors');
    // 进行数据操作...
  } finally {
    await client.close();
  }
}

main().catch(console.error);

// 示例代码：MQTT客户端
const mqtt = require('mqtt');

const client = mqtt.connect('mqtt://broker.hivemq.com');

client.on('connect', () => {
  client.subscribe('smartbuilding/sensors', (err) => {
    if (!err) {
      client.publish('smartbuilding/sensors', JSON.stringify({ temperature: 22 }));
    }
  });
});

client.on('message', (topic, message) => {
  console.log(`Received message on topic ${topic}: ${message.toString()}`);
});