first commit

.gitignore

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+# Based on https://raw.githubusercontent.com/github/gitignore/main/Node.gitignore
+
+# Logs
+
+logs
+_.log
+npm-debug.log_
+yarn-debug.log*
+yarn-error.log*
+lerna-debug.log*
+.pnpm-debug.log*
+
+# Caches
+
+.cache
+
+# Diagnostic reports (https://nodejs.org/api/report.html)
+
+report.[0-9]_.[0-9]_.[0-9]_.[0-9]_.json
+
+# Runtime data
+
+pids
+_.pid
+_.seed
+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+
+lib-cov
+
+# Coverage directory used by tools like istanbul
+
+coverage
+*.lcov
+
+# nyc test coverage
+
+.nyc_output
+
+# Grunt intermediate storage (https://gruntjs.com/creating-plugins#storing-task-files)
+
+.grunt
+
+# Bower dependency directory (https://bower.io/)
+
+bower_components
+
+# node-waf configuration
+
+.lock-wscript
+
+# Compiled binary addons (https://nodejs.org/api/addons.html)
+
+build/Release
+
+# Dependency directories
+
+node_modules/
+jspm_packages/
+
+# Snowpack dependency directory (https://snowpack.dev/)
+
+web_modules/
+
+# TypeScript cache
+
+*.tsbuildinfo
+
+# Optional npm cache directory
+
+.npm
+
+# Optional eslint cache
+
+.eslintcache
+
+# Optional stylelint cache
+
+.stylelintcache
+
+# Microbundle cache
+
+.rpt2_cache/
+.rts2_cache_cjs/
+.rts2_cache_es/
+.rts2_cache_umd/
+
+# Optional REPL history
+
+.node_repl_history
+
+# Output of 'npm pack'
+
+*.tgz
+
+# Yarn Integrity file
+
+.yarn-integrity
+
+# dotenv environment variable files
+
+.env
+.env.development.local
+.env.test.local
+.env.production.local
+.env.local
+
+# parcel-bundler cache (https://parceljs.org/)
+
+.parcel-cache
+
+# Next.js build output
+
+.next
+out
+
+# Nuxt.js build / generate output
+
+.nuxt
+dist
+
+# Gatsby files
+
+# Comment in the public line in if your project uses Gatsby and not Next.js
+
+# https://nextjs.org/blog/next-9-1#public-directory-support
+
+# public
+
+# vuepress build output
+
+.vuepress/dist
+
+# vuepress v2.x temp and cache directory
+
+.temp
+
+# Docusaurus cache and generated files
+
+.docusaurus
+
+# Serverless directories
+
+.serverless/
+
+# FuseBox cache
+
+.fusebox/
+
+# DynamoDB Local files
+
+.dynamodb/
+
+# TernJS port file
+
+.tern-port
+
+# Stores VSCode versions used for testing VSCode extensions
+
+.vscode-test
+
+# yarn v2
+
+.yarn/cache
+.yarn/unplugged
+.yarn/build-state.yml
+.yarn/install-state.gz
+.pnp.*
+
+# IntelliJ based IDEs
+.idea
+
+# Finder (MacOS) folder config
+.DS_Store
+
+
+.env

README.md

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+# Flood Notification App (Node js)
+
+#### this is the script for esp8266 connected to 2 water level sensor and a ultrasonic sensor.
+#### If the water reach the first water level sensor then "warning",
+#### If reach second water level then danger and the water is measure by ultrasonic
+#### the value is send to node js server (run it using "bun --hot index.js")
+#### then it will be display to a flutter app.
+
+![alt text](image.png)
+
+![alt text](image-1.png)

conn.js

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+const mysql = require('mysql');
+const dotenv = require('dotenv');
+
+dotenv.config();
+
+// Connect to the MySQL database
+const connection = mysql.createConnection({
+    host: process.env.DB_HOST,
+    user: process.env.DB_USER,
+    password: process.env.DB_PASS,
+    database: process.env.DB_NAME
+});
+
+// connection.connect((err) => {
+//     if (err) {
+//         console.error('Error connecting to MySQL database: ' + err.stack);
+//         return;
+//     }
+//     console.log('Connected to MySQL database as id ' + connection.threadId);
+// })
+
+module.exports = {connection}

index.js

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+const express = require('express');
+const http = require('http');
+const cors = require('cors');
+const dotenv = require('dotenv');
+const socket = require('./socket');
+const app = express();
+const server = http.createServer(app);
+const io = socket.init(server);
+const iosend = socket.getIO();
+const conn = require('./conn.js');
+const connection = conn.connection;
+
+dotenv.config();
+
+app.use(express.json());
+app.use(express.urlencoded({ extended: true }));
+// app.use(fileUpload());
+app.options('*', cors());
+app.use(cors());
+
+
+async function insert_data(water_height, status) {
+  const query_insert = 'INSERT INTO tb_data (water_height, status) VALUES (?, ?)';
+  const result_insert = await new Promise((resolve, reject) => {
+    connection.query(query_insert, [water_height, status], (err, result) => {
+      if (err) {
+        reject(err);
+      } else {
+        resolve(result);
+      }
+    });
+  })
+}
+
+
+app.post('/', async (req, res) => {
+  var data = req.body;
+  try {
+    const query_search = 'Select * from tb_data';
+    const result_search = await new Promise((resolve, reject) => {
+      connection.query(query_search, (err, result) => {
+        if (err) {
+          reject(err);
+        } else {
+          resolve(result);
+        }
+      });
+    })
+    var now = new Date();
+
+    const status = data.danger_level == 1 ? 2 : data.warning_level == 1 ? 1 : 0;
+    if (result_search.length > 0) {
+      const last_data = result_search[result_search.length - 1];
+
+      var converted_time_last = new Date(last_data.created_at);
+      now = now.getTime();
+      converted_time_last = converted_time_last.getTime();
+      var differenceInSeconds = (now - converted_time_last) / 1000;
+      console.log(differenceInSeconds, "second");
+
+
+      const thresholds = {
+        2: 30,
+        1: 60,
+        default: 120
+      };
+
+      const threshold = thresholds[status] || thresholds.default;
+
+      if (differenceInSeconds > threshold) {
+        insert_data(data.water_height, status);
+      }
+
+
+
+
+
+    } else {
+
+      insert_data(data.water_height, status);
+    }
+
+    console.log(data);
+    io.emit('data', data);
+    res.status(200).json({ message: 'success', data: data });
+  } catch (error) {
+    console.log("ini error post", error);
+    res.status(500).json({ message: 'Internal server error' });
+  }
+
+})
+
+
+app.get('/', async (req, res) => {
+  const date = req.query.date;
+  console.log(date, "ini di get");
+  
+  const query_search = date == null 
+  ? 'SELECT * FROM tb_data ORDER BY created_at DESC LIMIT 20' 
+  : 'SELECT * FROM tb_data WHERE created_at LIKE "%' + date + '%" ORDER BY created_at DESC';
+
+  const result_search = await new Promise((resolve, reject) => {
+    connection.query(query_search, (err, result) => {
+      if (err) {
+        reject(err);
+      } else {
+        resolve(result);
+      }
+    });
+  })
+  res.status(200).json({ message: 'success', data: result_search });
+
+})
+
+// app error handler
+app.use((err, req, res, next) => {
+  console.log(err);
+  res.status(500).send('Something broke!');
+});
+
+io.on('connection', (socket) => {
+  let userID = socket.id;
+  console.log('A user connected: ' + userID);
+
+  socket.on('scan_dia', (data) => {
+    console.log('Received scan_dia event: ' + data);
+  });
+
+  socket.on('disconnect', () => {
+    console.log('User disconnected: ' + userID);
+  });
+});
+
+module.exports = {
+  app,
+  server,
+  io
+};
+
+const port = process.env.PORT || 3001;
+
+// Start the server
+server.listen(port, () => {
+  console.log(`Server is running on http://localhost:${port}`);
+});

jsconfig.json

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+{
+  "compilerOptions": {
+    // Enable latest features
+    "lib": ["ESNext", "DOM"],
+    "target": "ESNext",
+    "module": "ESNext",
+    "moduleDetection": "force",
+    "jsx": "react-jsx",
+    "allowJs": true,
+
+    // Bundler mode
+    "moduleResolution": "bundler",
+    "allowImportingTsExtensions": true,
+    "verbatimModuleSyntax": true,
+    "noEmit": true,
+
+    // Best practices
+    "strict": true,
+    "skipLibCheck": true,
+    "noFallthroughCasesInSwitch": true,
+
+    // Some stricter flags (disabled by default)
+    "noUnusedLocals": false,
+    "noUnusedParameters": false,
+    "noPropertyAccessFromIndexSignature": false
+  }
+}

package.json

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+{
+  "name": "flood",
+  "version": "1.0.0",
+  "description": "flood backend",
+  "main": "index.js",
+  "author": "kicap",
+  "license": "ISC",
+  "dependencies": {
+    "dotenv": "^16.4.5",
+    "express": "^4.19.2",
+    "express-form-data": "^2.0.23",
+    "mysql": "^2.18.1",
+    "socket.io": "^4.7.5"
+  }
+}

socket.js

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+const socketio = require('socket.io');
+// const socketio_client = require('socket.io-client');
+const dotenv = require('dotenv');
+
+dotenv.config();
+
+// const socket_client = socketio_client("http://localhost:"+process.env.PORT);
+
+let io;
+
+function init(server) {
+  io = socketio(server);
+  return io;
+}
+
+function getIO() {
+  if (!io) {
+    throw new Error('Socket.io not initialized');
+  }
+  return io;
+}
+
+
+
+module.exports = {
+  init,
+  getIO,
+  // socket_client
+};