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2026-07-13 12:06:16 +08:00
commit e3c810b1a6
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+/**
+ * MQTT 模拟数据发送器
+ * 用于模拟水质监测设备发送数据
+ *
+ * 使用方法：
+ * 1. 确保MQTT Broker已启动 (node server.js)
+ * 2. 在新终端运行: node simulator.js
+ */
+
+const mqtt = require('mqtt');
+
+// MQTT配置
+const MQTT_CONFIG = {
+  host: 'localhost',
+  port: 1883,
+  username: 'admin',
+  password: 'admin',
+  clientId: 'water-quality-simulator',
+  topic: 'sea_status'
+};
+
+// 水质数据范围配置
+const DATA_RANGES = {
+  temp: { min: 15, max: 30, unit: '°C' },
+  ph: { min: 6.5, max: 8.5, unit: '' },
+  conductivity: { min: 500, max: 1500, unit: 'μS/cm' },
+  cod: { min: 10, max: 40, unit: 'mg/L' },
+  ammoniaNitrogen: { min: 0, max: 1.0, unit: 'mg/L' },
+  residualChlorine: { min: 0.1, max: 0.8, unit: 'mg/L' }
+};
+
+// 发送间隔（毫秒）
+const SEND_INTERVAL = 3000;
+
+// 生成随机水质数据
+function generateWaterQualityData() {
+  const generateValue = (range) => {
+    const value = range.min + Math.random() * (range.max - range.min);
+    return Math.round(value * 100) / 100; // 保留2位小数
+  };
+
+  return {
+    temp: generateValue(DATA_RANGES.temp),
+    ph: generateValue(DATA_RANGES.ph),
+    conductivity: Math.round(generateValue(DATA_RANGES.conductivity)),
+    cod: generateValue(DATA_RANGES.cod),
+    ammoniaNitrogen: generateValue(DATA_RANGES.ammoniaNitrogen),
+    residualChlorine: generateValue(DATA_RANGES.residualChlorine),
+    timestamp: Date.now()
+  };
+}
+
+// 连接MQTT服务器
+const client = mqtt.connect({
+  host: MQTT_CONFIG.host,
+  port: MQTT_CONFIG.port,
+  username: MQTT_CONFIG.username,
+  password: MQTT_CONFIG.password,
+  clientId: MQTT_CONFIG.clientId
+});
+
+// 连接成功
+client.on('connect', () => {
+  console.log('========================================');
+  console.log('   水质数据模拟器已连接');
+  console.log('========================================');
+  console.log(`MQTT服务器: mqtt://${MQTT_CONFIG.host}:${MQTT_CONFIG.port}`);
+  console.log(`发布主题: ${MQTT_CONFIG.topic}`);
+  console.log(`发送间隔: ${SEND_INTERVAL / 1000}秒`);
+  console.log('----------------------------------------');
+  console.log('按 Ctrl+C 停止发送');
+  console.log('========================================\n');
+
+  // 定时发送数据
+  let count = 1;
+  const interval = setInterval(() => {
+    const data = generateWaterQualityData();
+    const payload = JSON.stringify(data);
+
+    client.publish(MQTT_CONFIG.topic, payload, { qos: 0 }, (err) => {
+      if (err) {
+        console.error(`[发送失败] ${err.message}`);
+      } else {
+        console.log(`[第${count}次发送] ${new Date().toLocaleTimeString()}`);
+        console.log(`  温度: ${data.temp} °C`);
+        console.log(`  pH值: ${data.ph}`);
+        console.log(`  电导率: ${data.conductivity} μS/cm`);
+        console.log(`  COD: ${data.cod} mg/L`);
+        console.log(`  氨氮: ${data.ammoniaNitrogen} mg/L`);
+        console.log(`  余氯: ${data.residualChlorine} mg/L`);
+        console.log('---');
+        count++;
+      }
+    });
+  }, SEND_INTERVAL);
+
+  // 处理退出
+  process.on('SIGINT', () => {
+    clearInterval(interval);
+    client.end(() => {
+      console.log('\n模拟器已停止');
+      process.exit(0);
+    });
+  });
+});
+
+// 连接错误
+client.on('error', (err) => {
+  console.error('MQTT连接错误:', err.message);
+  console.error('请确保MQTT Broker正在运行 (node server.js)');
+  process.exit(1);
+});
+
+// 断开连接
+client.on('close', () => {
+  console.log('MQTT连接已断开');
+});