diff --git a/api/Dockerfile b/api/Dockerfile
index a9a8f5a..8415648 100644
--- a/api/Dockerfile
+++ b/api/Dockerfile
@@ -2,7 +2,7 @@ FROM node:20-alpine
 
 WORKDIR /app
 
-RUN npm init -y && npm install express
+RUN npm init -y && npm install express mysql2
 
 COPY server.js .
 COPY data.json .
diff --git a/api/data.json b/api/data.json
index 0e3657f..c93f562 100644
--- a/api/data.json
+++ b/api/data.json
@@ -1,7 +1,7 @@
 {
-  "CO2": 2.43,
-  "CO": 0.56,
-  "BZ": 3.11,
+  "CO2": 2.78,
+  "CO": 0.62,
+  "BZ": 3.7,
   "AQ": 100,
-  "updated_at": "2026-01-30T03:48:16.033Z"
+  "updated_at": "2026-03-11T12:46:55.233Z"
 }
\ No newline at end of file
diff --git a/api/server copy.js b/api/server copy.js
new file mode 100644
index 0000000..8841e87
--- /dev/null
+++ b/api/server copy.js	
@@ -0,0 +1,98 @@
+const express = require("express");
+const fs = require("fs");
+
+const app = express();
+const PORT = 3000;
+const DATA_FILE = "./data.json";
+
+// Helper: read data
+function readData() {
+  return JSON.parse(fs.readFileSync(DATA_FILE, "utf8"));
+}
+
+// Helper: write data
+function writeData(data) {
+  fs.writeFileSync(DATA_FILE, JSON.stringify(data, null, 2));
+}
+
+// ============================
+// GET /api/data → read values
+// ============================
+app.get("/data", (req, res) => {
+  try {
+    const data = readData();
+    res.json(data);
+  } catch (err) {
+    res.status(500).json({ error: "Gagal membaca data" });
+  }
+});
+
+// ============================
+// ADD SENSOR
+// ============================
+app.post("/addSensor", (req, res) => {
+  const { id } = req.body;
+
+  if (!id) {
+    return res.status(400).json({
+      error: "Sensor ID is required"
+    });
+  }
+
+  const sql = `INSERT INTO sensor_data (id) VALUES (?)`;
+
+  db.query(sql, [id], (err, result) => {
+    if (err) {
+      console.error(err);
+
+      // handle duplicate ID (optional but nice)
+      if (err.code === "ER_DUP_ENTRY") {
+        return res.status(400).json({
+          error: "Sensor already exists"
+        });
+      }
+
+      return res.status(500).json({ error: "DB error" });
+    }
+
+    res.json({
+      message: "Sensor added successfully",
+      id: id
+    });
+  });
+});
+
+// ===========================================
+// GET /api/update?co2=&co=&bz=&aq=
+// ===========================================
+app.get("/update", (req, res) => {
+  const { co2, co, bz, aq } = req.query;
+
+  if (!co2 || !co || !bz || !aq) {
+    return res.status(400).json({
+      error: "Parameter wajib: co2, co, bz, aq"
+    });
+  }
+
+  const newData = {
+    CO2: Number(co2),
+    CO: Number(co),
+    BZ: Number(bz),
+    AQ: Number(aq),
+    updated_at: new Date().toISOString()
+  };
+
+  try {
+    writeData(newData);
+    res.json({
+      message: "Data berhasil diperbarui",
+      data: newData
+    });
+  } catch (err) {
+    res.status(500).json({ error: "Gagal menyimpan data" });
+  }
+});
+
+app.listen(PORT, () => {
+  console.log(`API berjalan di port ${PORT}`);
+});
diff --git a/api/server.js b/api/server.js
index 8e430ba..5abe4b5 100644
--- a/api/server.js
+++ b/api/server.js
@@ -1,63 +1,306 @@
 const express = require("express");
-const fs = require("fs");
+const mysql = require("mysql2");
 
 const app = express();
 const PORT = 3000;
-const DATA_FILE = "./data.json";
-
-// Helper: read data
-function readData() {
-  return JSON.parse(fs.readFileSync(DATA_FILE, "utf8"));
-}
-
-// Helper: write data
-function writeData(data) {
-  fs.writeFileSync(DATA_FILE, JSON.stringify(data, null, 2));
-}
+app.use(express.json());
 
 // ============================
-// GET /api/data → read values
+// DB CONFIG
+// ============================
+const dbConfig = {
+  host: "db",          // docker service name
+  user: "leman",
+  password: "leman123",
+  database: "air_quality"
+};
+
+let db;
+
+// ============================
+// CONNECT WITH RETRY
+// ============================
+function connectDB() {
+  db = mysql.createConnection(dbConfig);
+
+  db.connect(err => {
+    if (err) {
+      console.error("❌ DB connection failed:", err.message);
+      console.log("🔄 Retrying in 5 seconds...");
+      setTimeout(connectDB, 5000);
+    } else {
+      console.log("✅ Connected to MariaDB");
+    }
+  });
+
+  db.on("error", err => {
+    console.error("⚠️ DB error:", err.message);
+
+    if (err.code === "PROTOCOL_CONNECTION_LOST") {
+      console.log("🔄 Reconnecting...");
+      connectDB();
+    } else {
+      throw err;
+    }
+  });
+}
+
+connectDB();
+
+// ============================
+// ROOT CHECK
+// ============================
+app.get("/", (req, res) => {
+  res.send("API is running 🚀");
+});
+
+// ============================
+// GET LATEST DATA
 // ============================
 app.get("/data", (req, res) => {
-  try {
-    const data = readData();
-    res.json(data);
-  } catch (err) {
-    res.status(500).json({ error: "Gagal membaca data" });
-  }
+  const sql = `
+    SELECT * FROM air_data
+    ORDER BY updated_at DESC
+    LIMIT 1
+  `;
+
+  db.query(sql, (err, results) => {
+    if (err) {
+      console.error(err);
+      return res.status(500).json({ error: "DB error" });
+    }
+
+    res.json(results[0] || {});
+  });
 });
 
-// ===========================================
-// GET /api/update?co2=&co=&bz=&aq=
-// ===========================================
+// ============================
+// INSERT DATA
+// ============================
 app.get("/update", (req, res) => {
-  const { co2, co, bz, aq } = req.query;
+  const { co2, co, bz, aq, id } = req.query;
 
-  if (!co2 || !co || !bz || !aq) {
+  if (!co2 || !co || !bz || !aq || !id) {
     return res.status(400).json({
-      error: "Parameter wajib: co2, co, bz, aq"
+      error: "Parameter wajib: co2, co, bz, aq, id"
     });
   }
 
-  const newData = {
-    CO2: Number(co2),
-    CO: Number(co),
-    BZ: Number(bz),
-    AQ: Number(aq),
-    updated_at: new Date().toISOString()
-  };
+  const sql = `
+    INSERT INTO air_data (co2, co, bz, aq, id)
+    VALUES (?, ?, ?, ?, ?)
+  `;
 
-  try {
-    writeData(newData);
-    res.json({
-      message: "Data berhasil diperbarui",
-      data: newData
-    });
-  } catch (err) {
-    res.status(500).json({ error: "Gagal menyimpan data" });
-  }
+  db.query(
+    sql,
+    [
+      Number(co2),
+      Number(co),
+      Number(bz),
+      Number(aq),
+      String(id)   // sensor id
+    ],
+    (err, result) => {
+      if (err) {
+        console.error(err);
+        return res.status(500).json({ error: "DB error" });
+      }
+
+      res.json({
+        message: "Data berhasil disimpan",
+        insertId: result.insertId
+      });
+    }
+  );
 });
 
+app.get("/sensordata/:id", (req, res) => {
+  const sensorId = req.params.id;
+
+  const sql = `
+    SELECT 
+      air_data.co2,
+      air_data.co,
+      air_data.bz,
+      air_data.aq,
+      air_data.updated_at,
+
+      sensor_data.alamat,
+
+      kelurahan.nama AS kelurahan,
+      kecamatan.nama AS kecamatan
+
+    FROM air_data
+
+    JOIN sensor_data 
+      ON air_data.id = sensor_data.id
+
+    JOIN kelurahan 
+      ON sensor_data.kelurahan = kelurahan.id
+
+    JOIN kecamatan 
+      ON kelurahan.kecamatan_id = kecamatan.id
+
+    WHERE air_data.id = ?
+    ORDER BY air_data.updated_at DESC
+    LIMIT 1
+  `;
+
+  db.query(sql, [sensorId], (err, results) => {
+    if (err) {
+      console.error(err);
+      return res.status(500).json({ error: "DB error" });
+    }
+
+    if (results.length === 0) {
+      return res.status(404).json({
+        error: "Sensor not found"
+      });
+    }
+
+    res.json(results[0]);
+  });
+});
+
+app.get("/sensors", (req, res) => {
+  const sql = `SELECT id FROM sensor_data`;
+
+  db.query(sql, (err, results) => {
+    if (err) {
+      return res.status(500).json({ error: "DB error" });
+    }
+
+    res.json(results);
+  });
+});
+
+// ============================
+// ADD SENSOR
+// ============================
+app.post("/addSensor", (req, res) => {
+  const { kelurahan, alamat } = req.body;
+
+  // ============================
+  // VALIDATION
+  // ============================
+  if (!kelurahan || !alamat) {
+    return res.status(400).json({
+      error: "kelurahan dan alamat wajib diisi"
+    });
+  }
+
+  // ============================
+  // VALIDATE KELURAHAN EXISTS
+  // ============================
+  const checkSql = `SELECT id FROM kelurahan WHERE id = ?`;
+
+  db.query(checkSql, [kelurahan], (err, rows) => {
+    if (err) {
+      console.error(err);
+      return res.status(500).json({ error: "DB error" });
+    }
+
+    if (rows.length === 0) {
+      return res.status(400).json({
+        error: "Kelurahan tidak valid"
+      });
+    }
+
+    // ============================
+    // INSERT SENSOR
+    // ============================
+    const insertSql = `
+      INSERT INTO sensor_data (kelurahan, alamat)
+      VALUES (?, ?)
+    `;
+
+    db.query(insertSql, [kelurahan, alamat], (err, result) => {
+      if (err) {
+        console.error(err);
+        return res.status(500).json({
+          error: "DB error saat insert"
+        });
+      }
+
+      res.json({
+        message: "Sensor berhasil ditambahkan",
+        sensor_id: result.insertId
+      });
+    });
+  });
+});
+
+// ============================
+// GET ALL DATA (OPTIONAL)
+// ============================
+app.get("/history", (req, res) => {
+  const sql = `
+    SELECT * FROM air_data
+    ORDER BY updated_at DESC
+    LIMIT 100
+  `;
+
+  db.query(sql, (err, results) => {
+    if (err) {
+      return res.status(500).json({ error: "DB error" });
+    }
+
+    res.json(results);
+  });
+});
+
+
+
+// get kecamatan
+app.get("/kecamatan", (req, res) => {
+  const sql = `SELECT id, nama FROM kecamatan ORDER BY nama ASC`;
+
+  db.query(sql, (err, results) => {
+    if (err) {
+      console.error(err);
+      return res.status(500).json({ error: "DB error" });
+    }
+
+    res.json(results);
+  });
+});
+
+
+// get kelurahan by kecamatan_id
+app.get("/kelurahan", (req, res) => {
+  const { kecamatan_id } = req.query;
+
+  let sql = `
+    SELECT 
+      kelurahan.id,
+      kelurahan.nama,
+      kecamatan.nama AS kecamatan
+    FROM kelurahan
+    JOIN kecamatan ON kelurahan.kecamatan_id = kecamatan.id
+  `;
+
+  let params = [];
+
+  if (kecamatan_id) {
+    sql += ` WHERE kelurahan.kecamatan_id = ?`;
+    params.push(kecamatan_id);
+  }
+
+  sql += ` ORDER BY kelurahan.nama ASC`;
+
+  db.query(sql, params, (err, results) => {
+    if (err) {
+      console.error(err);
+      return res.status(500).json({ error: "DB error" });
+    }
+
+    res.json(results);
+  });
+});
+
+// ============================
+// START SERVER
+// ============================
 app.listen(PORT, () => {
-  console.log(`API berjalan di port ${PORT}`);
-});
+  console.log(`🚀 API running on port ${PORT}`);
+});
\ No newline at end of file
diff --git a/docker-compose copy.yml b/docker-compose copy.yml
new file mode 100644
index 0000000..6bf9b8d
--- /dev/null
+++ b/docker-compose copy.yml	
@@ -0,0 +1,21 @@
+version: "3.8"
+
+services:
+  web:
+    image: nginx:alpine
+    container_name: air-quality-web
+    ports:
+      - "8080:80"
+    volumes:
+      - ./site:/usr/share/nginx/html:ro
+      - ./nginx/default.conf:/etc/nginx/conf.d/default.conf:ro
+    depends_on:
+      - api
+    restart: unless-stopped
+
+  api:
+    build: ./api
+    container_name: air-quality-api
+    volumes:
+      - ./api/data.json:/app/data.json
+    restart: unless-stopped
diff --git a/docker-compose.yml b/docker-compose.yml
index 6bf9b8d..4e511ce 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -15,7 +15,36 @@ services:
 
   api:
     build: ./api
+    # ports:
+    #   - "3000:3000"
     container_name: air-quality-api
-    volumes:
-      - ./api/data.json:/app/data.json
+    depends_on:
+      - db   # 👈 IMPORTANT
     restart: unless-stopped
+
+  db:
+    image: mariadb:10.5
+    container_name: air-quality-db
+    restart: unless-stopped
+    environment:
+      MYSQL_ROOT_PASSWORD: leman123
+      MYSQL_DATABASE: air_quality
+      MYSQL_USER: leman
+      MYSQL_PASSWORD: leman123
+    volumes:
+      - db_data:/var/lib/mysql
+
+  phpmyadmin:
+    image: phpmyadmin/phpmyadmin
+    container_name: air-quality-pma
+    restart: unless-stopped
+    ports:
+      - "8081:80"
+    environment:
+      PMA_HOST: db
+      PMA_PORT: 3306
+    depends_on:
+      - db
+
+volumes:
+  db_data:
\ No newline at end of file
diff --git a/site/index copy.html b/site/index copy.html
new file mode 100644
index 0000000..81fa69d
--- /dev/null
+++ b/site/index copy.html	
@@ -0,0 +1,247 @@
+<!DOCTYPE html>
+<html lang="en">
+
+<head>
+  <meta charset="UTF-8">
+  <title>Sensor Kualitas Udara</title>
+  <style>
+    body {
+      font-family: Arial, sans-serif;
+      background: #0f172a;
+      color: #e5e7eb;
+      padding: 20px;
+    }
+
+    .card {
+      background: #1e293b;
+      padding: 15px;
+      margin: 10px 0;
+      border-radius: 8px;
+      font-size: 20px;
+    }
+
+    #container {
+      display: grid;
+      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
+      gap: 10px;
+    }
+  </style>
+</head>
+
+<body>
+
+  <h1>🌱 Sensor Kualitas Udara</h1>
+
+  <div id="container"></div>
+  <hr>
+  <button onclick="openDialog()">Add Sensor</button>
+  <div id="dialog"
+    style="display:none; position:fixed; top:0; left:0; width:100%; height:100%; background:rgba(0,0,0,0.7);">
+    <div style="background:#1e293b; padding:20px; width:300px; margin:100px auto; border-radius:10px;">
+
+      <h3>Tambah Sensor</h3>
+
+      <label>Kecamatan:</label><br>
+      <select id="kecamatan" onchange="loadKelurahan()">
+        <option value="">-- Pilih Kecamatan --</option>
+      </select>
+      <br><br>
+
+      <label>Kelurahan:</label><br>
+      <select id="kelurahan">
+        <option value="">-- Pilih Kelurahan --</option>
+      </select>
+      <br><br>
+
+      <label>Alamat:</label><br>
+      <textarea id="alamat" rows="3" style="width:100%"></textarea>
+      <br><br>
+
+      <button onclick="addSensor()">Simpan</button>
+      <button onclick="closeDialog()">Batal</button>
+    </div>
+  </div>
+
+  <script>
+    function getStatus(aq) {
+      if (aq >= 90) return "Sangat Baik";
+      if (aq >= 70) return "Baik";
+      if (aq >= 50) return "Sedang";
+      if (aq > 30) return "Buruk";
+      return "Sangat Buruk";
+    }
+
+    async function fetchAllSensors() {
+      try {
+        const res = await fetch("/api/sensors");
+        return await res.json();
+      } catch (err) {
+        console.error("Failed to fetch sensors", err);
+        return [];
+      }
+    }
+
+    async function fetchSensorData(id) {
+      try {
+        const res = await fetch(`/api/sensordata/${id}`);
+        return await res.json();
+      } catch (err) {
+        console.error(`Failed sensor ${id}`, err);
+        return null;
+      }
+    }
+
+    async function fetchData() {
+      const container = document.getElementById("container");
+      container.innerHTML = "";
+
+      const sensors = await fetchAllSensors();
+
+      for (const sensor of sensors) {
+        const data = await fetchSensorData(sensor.id);
+
+        const card = document.createElement("div");
+        card.className = "card";
+
+        if (!data || data.error) {
+          card.innerHTML = `
+          <h3>Sensor ID: ${sensor.id}</h3>
+          <p style="color: orange;">Belum Ada Data</p>
+        `;
+        } else {
+          card.innerHTML = `
+  <h3>Sensor ID: ${sensor.id}</h3>
+  <small>${data.kecamatan} - ${data.kelurahan}</small><br>
+  <small>${data.alamat}</small><br><br>
+
+  Karbon Oksida: ${data.co2} ppm<br>
+  Karbon Monoksida: ${data.co} ppm<br>
+  Benzena: ${data.bz} ppm<br>
+  Jumlah: ${data.aq} %<br>
+  Kualitas: ${getStatus(data.aq)}
+`;
+        }
+
+        container.appendChild(card);
+      }
+    }
+
+    // ============================
+    // ADD SENSOR
+    // ============================
+    async function addSensor() {
+      const kecamatan = document.getElementById("kecamatan").value;
+      const kelurahan = document.getElementById("kelurahan").value;
+      const alamat = document.getElementById("alamat").value;
+
+      if (!kecamatan || !kelurahan || !alamat) {
+        alert("Semua field wajib diisi!");
+        return;
+      }
+
+      try {
+        const res = await fetch("/api/addSensor", {
+          method: "POST",
+          headers: {
+            "Content-Type": "application/json"
+          },
+          body: JSON.stringify({
+            kecamatan,
+            kelurahan,
+            alamat
+          })
+        });
+
+        const result = await res.json();
+
+        if (!res.ok) {
+          alert(result.error || "Gagal");
+          return;
+        }
+
+        alert("Sensor berhasil ditambahkan!");
+
+        closeDialog(); // 👈 close popup
+
+        // reset form
+        document.getElementById("kecamatan").value = "";
+        document.getElementById("kelurahan").innerHTML = `<option value="">-- Pilih Kelurahan --</option>`;
+        document.getElementById("alamat").value = "";
+
+        fetchData();
+      } catch (err) {
+        console.error(err);
+        alert("Error");
+      }
+    }
+
+
+    fetchData();
+    setInterval(fetchData, 5000);
+
+    function openDialog() {
+      document.getElementById("dialog").style.display = "block";
+      loadKecamatan(); // load when opened
+    }
+
+    function closeDialog() {
+      document.getElementById("dialog").style.display = "none";
+    }
+
+    // load data kecamatan
+    async function loadKecamatan() {
+      try {
+        const res = await fetch("/api/kecamatan");
+        const data = await res.json();
+
+        const select = document.getElementById("kecamatan");
+
+        // reset
+        select.innerHTML = `<option value="">-- Pilih Kecamatan --</option>`;
+
+        data.forEach(k => {
+          const option = document.createElement("option");
+          option.value = k.id;
+          option.textContent = k.nama;
+          select.appendChild(option);
+        });
+
+      } catch (err) {
+        console.error("Failed load kecamatan", err);
+      }
+    }
+
+
+
+    // load data kelurahan
+    async function loadKelurahan() {
+      const kecamatanId = document.getElementById("kecamatan").value;
+
+      const select = document.getElementById("kelurahan");
+
+      // reset first
+      select.innerHTML = `<option value="">-- Pilih Kelurahan --</option>`;
+
+      if (!kecamatanId) return;
+
+      try {
+        const res = await fetch(`/api/kelurahan?kecamatan_id=${kecamatanId}`);
+        const data = await res.json();
+
+        data.forEach(k => {
+          const option = document.createElement("option");
+          option.value = k.id;
+          option.textContent = k.nama;
+          select.appendChild(option);
+        });
+
+      } catch (err) {
+        console.error("Failed load kelurahan", err);
+      }
+    }
+
+  </script>
+
+</body>
+
+</html>
\ No newline at end of file
diff --git a/site/index.html b/site/index.html
index 605e330..53f6ef9 100644
--- a/site/index.html
+++ b/site/index.html
@@ -1,5 +1,6 @@
 <!DOCTYPE html>
 <html lang="en">
+
 <head>
   <meta charset="UTF-8">
   <title>Sensor Kualitas Udara</title>
@@ -10,6 +11,7 @@
       color: #e5e7eb;
       padding: 20px;
     }
+
     .card {
       background: #1e293b;
       padding: 15px;
@@ -17,35 +19,254 @@
       border-radius: 8px;
       font-size: 20px;
     }
+
+    #container {
+      display: grid;
+      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
+      gap: 10px;
+    }
   </style>
 </head>
+
 <body>
 
   <h1>🌱 Sensor Kualitas Udara</h1>
 
-  <div class="card">CO₂: <span id="co2">-</span></div>
-  <div class="card">CO: <span id="co">-</span></div>
-  <div class="card">BZ: <span id="bz">-</span></div>
-  <div class="card">AQ: <span id="aq">-</span></div>
+  <div id="container"></div>
+
+  <hr>
+  <button onclick="openDialog()">Add Sensor</button>
+
+  <!-- MODAL -->
+  <div id="dialog"
+    style="display:none; position:fixed; top:0; left:0; width:100%; height:100%; background:rgba(0,0,0,0.7);">
+    <div style="background:#1e293b; padding:20px; width:300px; margin:100px auto; border-radius:10px;">
+
+      <h3>Tambah Sensor</h3>
+
+      <label>Kecamatan:</label><br>
+      <select id="kecamatan" onchange="loadKelurahan()">
+        <option value="">-- Pilih Kecamatan --</option>
+      </select>
+      <br><br>
+
+      <label>Kelurahan:</label><br>
+      <select id="kelurahan">
+        <option value="">-- Pilih Kelurahan --</option>
+      </select>
+      <br><br>
+
+      <label>Alamat:</label><br>
+      <textarea id="alamat" rows="3" style="width:100%"></textarea>
+      <br><br>
+
+      <button onclick="addSensor()">Simpan</button>
+      <button onclick="closeDialog()">Batal</button>
+    </div>
+  </div>
 
   <script>
-    async function fetchData() {
-      try {
-        const res = await fetch("/api/data");
-        const data = await res.json();
+    function getStatus(aq) {
+      if (aq >= 90) return "Sangat Baik";
+      if (aq >= 70) return "Baik";
+      if (aq >= 50) return "Sedang";
+      if (aq > 30) return "Buruk";
+      return "Sangat Buruk";
+    }
 
-        document.getElementById("co2").textContent = data.CO2 + 'ppm';
-        document.getElementById("co").textContent = data.CO + 'ppm';
-        document.getElementById("bz").textContent = data.BZ + 'ppm';
-        document.getElementById("aq").textContent = data.AQ + '%';
+    async function fetchAllSensors() {
+      try {
+        const res = await fetch("/api/sensors");
+        return await res.json();
       } catch (err) {
-        console.error("Failed to fetch data", err);
+        console.error("Failed to fetch sensors", err);
+        return [];
       }
     }
 
-    fetchData();
-    setInterval(fetchData, 3000); // refresh every 3 seconds
+    async function fetchSensorData(id) {
+      try {
+        const res = await fetch(`/api/sensordata/${id}`);
+        return await res.json();
+      } catch (err) {
+        console.error(`Failed sensor ${id}`, err);
+        return null;
+      }
+    }
+
+    // ============================
+    // BUILD UI ONCE
+    // ============================
+    async function initSensors() {
+      const container = document.getElementById("container");
+      container.innerHTML = "";
+
+      const sensors = await fetchAllSensors();
+
+      for (const sensor of sensors) {
+        const data = await fetchSensorData(sensor.id);
+
+        const card = document.createElement("div");
+        card.className = "card";
+
+        if (!data || data.error) {
+          card.innerHTML = `
+            <h3>Sensor ID: ${sensor.id}</h3>
+            <p style="color: orange;">Belum Ada Data</p>
+          `;
+        } else {
+          card.innerHTML = `
+            <h3>Sensor ID: ${sensor.id}</h3>
+            <small>${data.kecamatan} - ${data.kelurahan}</small><br>
+            <small>${data.alamat}</small><br><br>
+
+            Karbon Oksida: <span id="co2-${sensor.id}">-</span> ppm<br>
+            Karbon Monoksida: <span id="co-${sensor.id}">-</span> ppm<br>
+            Benzena: <span id="bz-${sensor.id}">-</span> ppm<br>
+            Jumlah: <span id="aq-${sensor.id}">-</span> %<br>
+            Kualitas: <span id="qa-${sensor.id}">-</span>
+          `;
+        }
+
+        container.appendChild(card);
+      }
+    }
+
+    // ============================
+    // UPDATE VALUES ONLY
+    // ============================
+    async function updateSensorValues() {
+      const sensors = await fetchAllSensors();
+
+      for (const sensor of sensors) {
+        const data = await fetchSensorData(sensor.id);
+
+        if (!data || data.error) continue;
+
+        document.getElementById(`co2-${sensor.id}`).textContent = data.co2;
+        document.getElementById(`co-${sensor.id}`).textContent = data.co;
+        document.getElementById(`bz-${sensor.id}`).textContent = data.bz;
+        document.getElementById(`aq-${sensor.id}`).textContent = data.aq;
+        document.getElementById(`qa-${sensor.id}`).textContent = getStatus(data.aq);
+      }
+    }
+
+    // ============================
+    // MODAL CONTROL
+    // ============================
+    function openDialog() {
+      document.getElementById("dialog").style.display = "block";
+      loadKecamatan();
+    }
+
+    function closeDialog() {
+      document.getElementById("dialog").style.display = "none";
+    }
+
+    // ============================
+    // LOAD KECAMATAN
+    // ============================
+    async function loadKecamatan() {
+      try {
+        const res = await fetch("/api/kecamatan");
+        const data = await res.json();
+
+        const select = document.getElementById("kecamatan");
+        select.innerHTML = `<option value="">-- Pilih Kecamatan --</option>`;
+
+        data.forEach(k => {
+          const option = document.createElement("option");
+          option.value = k.id;
+          option.textContent = k.nama;
+          select.appendChild(option);
+        });
+
+      } catch (err) {
+        console.error("Failed load kecamatan", err);
+      }
+    }
+
+    // ============================
+    // LOAD KELURAHAN
+    // ============================
+    async function loadKelurahan() {
+      const kecamatanId = document.getElementById("kecamatan").value;
+
+      const select = document.getElementById("kelurahan");
+      select.innerHTML = `<option value="">-- Pilih Kelurahan --</option>`;
+
+      if (!kecamatanId) return;
+
+      try {
+        const res = await fetch(`/api/kelurahan?kecamatan_id=${kecamatanId}`);
+        const data = await res.json();
+
+        data.forEach(k => {
+          const option = document.createElement("option");
+          option.value = k.id;
+          option.textContent = k.nama;
+          select.appendChild(option);
+        });
+
+      } catch (err) {
+        console.error("Failed load kelurahan", err);
+      }
+    }
+
+    // ============================
+    // ADD SENSOR
+    // ============================
+    async function addSensor() {
+      const kelurahan = document.getElementById("kelurahan").value;
+      const alamat = document.getElementById("alamat").value;
+
+      if (!kelurahan || !alamat) {
+        alert("Semua field wajib diisi!");
+        return;
+      }
+
+      try {
+        const res = await fetch("/api/addSensor", {
+          method: "POST",
+          headers: {
+            "Content-Type": "application/json"
+          },
+          body: JSON.stringify({
+            kelurahan,
+            alamat
+          })
+        });
+
+        const result = await res.json();
+
+        if (!res.ok) {
+          alert(result.error || "Gagal");
+          return;
+        }
+
+        alert("Sensor berhasil ditambahkan!");
+
+        closeDialog();
+
+        document.getElementById("kecamatan").value = "";
+        document.getElementById("kelurahan").innerHTML = `<option value="">-- Pilih Kelurahan --</option>`;
+        document.getElementById("alamat").value = "";
+
+        await initSensors(); // rebuild only when new sensor added
+      } catch (err) {
+        console.error(err);
+        alert("Error");
+      }
+    }
+
+    // ============================
+    // INIT
+    // ============================
+    initSensors();
+    updateSensorValues()
+    setInterval(updateSensorValues, 5000);
   </script>
 
 </body>
-</html>
+
+</html>
\ No newline at end of file