diff --git a/ESP32_CAN_Logger.ino b/ESP32_CAN_Logger.ino
index 0c632f7..7877ff2 100644
--- a/ESP32_CAN_Logger.ino
+++ b/ESP32_CAN_Logger.ino
@@ -16,6 +16,7 @@
 #include <freertos/semphr.h>
 #include "index.h"
 #include "transmit.h"
+#include "graph.h"  // 그래프 페이지 추가
 
 // GPIO 핀 정의
 #define CAN_INT_PIN 27
@@ -738,6 +739,10 @@ void setup() {
         server.send_P(200, "text/html", transmit_html);
     });
     
+    server.on("/graph", HTTP_GET, []() {
+        server.send_P(200, "text/html", graph_html);
+    });
+    
     server.on("/download", HTTP_GET, []() {
         if (server.hasArg("file")) {
             String filename = "/" + server.arg("file");
@@ -783,8 +788,10 @@ void setup() {
     Serial.println("  1. WiFi: ESP32_CAN_Logger (12345678)");
     Serial.print("  2. http://");
     Serial.println(WiFi.softAPIP());
-    Serial.println("  3. Monitor: /");
-    Serial.println("  4. Transmit: /transmit");
+    Serial.println("  3. Pages:");
+    Serial.println("     - Monitor:  /");
+    Serial.println("     - Transmit: /transmit");
+    Serial.println("     - Graph:    /graph");
     Serial.println("========================================\n");
 }
 
diff --git a/graph.h b/graph.h
new file mode 100644
index 0000000..2258b34
--- /dev/null
+++ b/graph.h
@@ -0,0 +1,495 @@
+#ifndef GRAPH_H
+#define GRAPH_H
+
+const char graph_html[] PROGMEM = R"rawliteral(
+<!DOCTYPE html>
+<html>
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>CAN Signal Graph</title>
+    <script src="https://cdn.jsdelivr.net/npm/chart.js@4.4.0/dist/chart.umd.min.js"></script>
+    <style>
+        * { margin: 0; padding: 0; box-sizing: border-box; }
+        body {
+            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
+            background: linear-gradient(135deg, #43cea2 0%, #185a9d 100%);
+            min-height: 100vh;
+            padding: 20px;
+        }
+        .container {
+            max-width: 1600px;
+            margin: 0 auto;
+            background: white;
+            border-radius: 15px;
+            box-shadow: 0 20px 60px rgba(0,0,0,0.3);
+            overflow: hidden;
+        }
+        .header {
+            background: linear-gradient(135deg, #43cea2 0%, #185a9d 100%);
+            color: white;
+            padding: 30px;
+            text-align: center;
+        }
+        .header h1 { font-size: 2.5em; margin-bottom: 10px; }
+        .nav {
+            background: #2c3e50;
+            padding: 15px 30px;
+            display: flex;
+            gap: 20px;
+        }
+        .nav a {
+            color: white;
+            text-decoration: none;
+            padding: 10px 20px;
+            border-radius: 5px;
+            transition: all 0.3s;
+        }
+        .nav a:hover { background: #34495e; }
+        .nav a.active { background: #3498db; }
+        .content { padding: 30px; }
+        
+        .dbc-upload {
+            background: #f8f9fa;
+            padding: 25px;
+            border-radius: 10px;
+            margin-bottom: 20px;
+        }
+        .upload-area {
+            border: 3px dashed #43cea2;
+            border-radius: 10px;
+            padding: 40px;
+            text-align: center;
+            cursor: pointer;
+            transition: all 0.3s;
+        }
+        .upload-area:hover { background: #f0f9ff; border-color: #185a9d; }
+        .upload-area input { display: none; }
+        
+        .signal-selector {
+            background: #f8f9fa;
+            padding: 20px;
+            border-radius: 10px;
+            margin-bottom: 20px;
+        }
+        .signal-grid {
+            display: grid;
+            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
+            gap: 15px;
+            margin-top: 15px;
+        }
+        .signal-item {
+            background: white;
+            padding: 15px;
+            border-radius: 8px;
+            border: 2px solid #ddd;
+            cursor: pointer;
+            transition: all 0.3s;
+        }
+        .signal-item:hover { border-color: #43cea2; transform: translateY(-2px); }
+        .signal-item.selected { border-color: #185a9d; background: #e3f2fd; }
+        .signal-name { font-weight: 600; color: #333; margin-bottom: 5px; }
+        .signal-info { font-size: 0.85em; color: #666; }
+        
+        .graph-container {
+            background: white;
+            padding: 20px;
+            border-radius: 10px;
+            margin-bottom: 20px;
+        }
+        .graph-canvas {
+            position: relative;
+            height: 400px;
+        }
+        
+        .controls {
+            display: flex;
+            gap: 10px;
+            margin-bottom: 20px;
+            flex-wrap: wrap;
+        }
+        .btn {
+            padding: 12px 25px;
+            border: none;
+            border-radius: 5px;
+            font-size: 1em;
+            font-weight: 600;
+            cursor: pointer;
+            transition: all 0.3s;
+        }
+        .btn-primary { background: linear-gradient(135deg, #43cea2 0%, #185a9d 100%); color: white; }
+        .btn-success { background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%); color: white; }
+        .btn-danger { background: linear-gradient(135deg, #eb3349 0%, #f45c43 100%); color: white; }
+        .btn:hover { transform: translateY(-2px); box-shadow: 0 5px 15px rgba(0,0,0,0.3); }
+        
+        h2 {
+            color: #333;
+            margin: 30px 0 20px 0;
+            padding-bottom: 10px;
+            border-bottom: 3px solid #43cea2;
+        }
+        
+        .status { padding: 15px; background: #fff3cd; border-radius: 5px; margin-bottom: 20px; }
+        .status.success { background: #d4edda; color: #155724; }
+        .status.error { background: #f8d7da; color: #721c24; }
+    </style>
+</head>
+<body>
+    <div class="container">
+        <div class="header">
+            <h1>📈 CAN Signal Graph</h1>
+            <p>Real-time Signal Visualization</p>
+        </div>
+        
+        <div class="nav">
+            <a href="/">📊 Monitor</a>
+            <a href="/transmit">📡 Transmit</a>
+            <a href="/graph" class="active">📈 Graph</a>
+        </div>
+        
+        <div class="content">
+            <div id="status" class="status" style="display:none;"></div>
+            
+            <h2>📁 Upload DBC File</h2>
+            <div class="dbc-upload">
+                <div class="upload-area" onclick="document.getElementById('dbc-file').click()">
+                    <input type="file" id="dbc-file" accept=".dbc" onchange="loadDBCFile(event)">
+                    <p style="font-size: 1.2em; margin-bottom: 10px;">🗂️ Click to upload DBC file</p>
+                    <p style="color: #666;">or drag and drop here</p>
+                </div>
+            </div>
+            
+            <div id="signal-section" style="display:none;">
+                <h2>🎯 Select Signals (Max 6)</h2>
+                <div class="controls">
+                    <button class="btn btn-success" onclick="startGraphing()">▶️ Start Graphing</button>
+                    <button class="btn btn-danger" onclick="stopGraphing()">⏹️ Stop</button>
+                    <button class="btn btn-primary" onclick="clearSelection()">🗑️ Clear Selection</button>
+                </div>
+                
+                <div class="signal-selector">
+                    <div id="signal-list" class="signal-grid"></div>
+                </div>
+                
+                <h2>📊 Real-time Graphs</h2>
+                <div id="graphs"></div>
+            </div>
+        </div>
+    </div>
+    
+    <script>
+        let ws;
+        let dbcData = {};
+        let selectedSignals = [];
+        let charts = {};
+        let graphing = false;
+        const MAX_SIGNALS = 6;
+        const MAX_DATA_POINTS = 60;
+        const COLORS = ['#FF6384', '#36A2EB', '#FFCE56', '#4BC0C0', '#9966FF', '#FF9F40'];
+        
+        function initWebSocket() {
+            ws = new WebSocket('ws://' + window.location.hostname + ':81');
+            
+            ws.onopen = function() {
+                console.log('WebSocket connected');
+            };
+            
+            ws.onclose = function() {
+                console.log('WebSocket disconnected');
+                setTimeout(initWebSocket, 3000);
+            };
+            
+            ws.onmessage = function(event) {
+                const data = JSON.parse(event.data);
+                
+                if (data.type === 'canBatch' && graphing) {
+                    processCANData(data.messages);
+                }
+            };
+        }
+        
+        function loadDBCFile(event) {
+            const file = event.target.files[0];
+            if (!file) return;
+            
+            const reader = new FileReader();
+            reader.onload = function(e) {
+                const content = e.target.result;
+                parseDBCContent(content);
+            };
+            reader.readAsText(file);
+        }
+        
+        function parseDBCContent(content) {
+            dbcData = {messages: {}};
+            const lines = content.split('\n');
+            let currentMessage = null;
+            
+            for (let line of lines) {
+                line = line.trim();
+                
+                if (line.startsWith('BO_ ')) {
+                    const match = line.match(/BO_ (\d+) (\w+):/);
+                    if (match) {
+                        const id = parseInt(match[1]);
+                        const name = match[2];
+                        currentMessage = {id: id, name: name, signals: []};
+                        dbcData.messages[id] = currentMessage;
+                    }
+                }
+                else if (line.startsWith('SG_ ') && currentMessage) {
+                    const match = line.match(/SG_ (\w+) : (\d+)\|(\d+)@([01])([+-]) \(([^,]+),([^)]+)\) \[([^\]]+)\] "([^"]*)"/);
+                    if (match) {
+                        const signal = {
+                            name: match[1],
+                            startBit: parseInt(match[2]),
+                            bitLength: parseInt(match[3]),
+                            byteOrder: match[4] === '0' ? 'motorola' : 'intel',
+                            signed: match[5] === '-',
+                            factor: parseFloat(match[6]),
+                            offset: parseFloat(match[7]),
+                            unit: match[9],
+                            messageId: currentMessage.id,
+                            messageName: currentMessage.name
+                        };
+                        currentMessage.signals.push(signal);
+                    }
+                }
+            }
+            
+            displaySignals();
+            showStatus('DBC file loaded successfully! Found ' + 
+                Object.keys(dbcData.messages).length + ' messages.', 'success');
+        }
+        
+        function displaySignals() {
+            const signalList = document.getElementById('signal-list');
+            signalList.innerHTML = '';
+            
+            for (let msgId in dbcData.messages) {
+                const msg = dbcData.messages[msgId];
+                msg.signals.forEach(signal => {
+                    const item = document.createElement('div');
+                    item.className = 'signal-item';
+                    item.onclick = () => toggleSignal(signal, item);
+                    item.innerHTML = 
+                        '<div class="signal-name">' + signal.name + '</div>' +
+                        '<div class="signal-info">' +
+                        'ID: 0x' + signal.messageId.toString(16).toUpperCase() + ' | ' +
+                        signal.bitLength + ' bits | ' +
+                        (signal.unit || 'no unit') +
+                        '</div>';
+                    signalList.appendChild(item);
+                });
+            }
+            
+            document.getElementById('signal-section').style.display = 'block';
+        }
+        
+        function toggleSignal(signal, element) {
+            const index = selectedSignals.findIndex(s => 
+                s.messageId === signal.messageId && s.name === signal.name);
+            
+            if (index >= 0) {
+                selectedSignals.splice(index, 1);
+                element.classList.remove('selected');
+            } else {
+                if (selectedSignals.length >= MAX_SIGNALS) {
+                    showStatus('Maximum ' + MAX_SIGNALS + ' signals allowed!', 'error');
+                    return;
+                }
+                selectedSignals.push(signal);
+                element.classList.add('selected');
+            }
+        }
+        
+        function clearSelection() {
+            selectedSignals = [];
+            document.querySelectorAll('.signal-item').forEach(item => {
+                item.classList.remove('selected');
+            });
+        }
+        
+        function startGraphing() {
+            if (selectedSignals.length === 0) {
+                showStatus('Please select at least one signal!', 'error');
+                return;
+            }
+            
+            graphing = true;
+            createGraphs();
+            showStatus('Graphing started for ' + selectedSignals.length + ' signals', 'success');
+        }
+        
+        function stopGraphing() {
+            graphing = false;
+            showStatus('Graphing stopped', 'success');
+        }
+        
+        function createGraphs() {
+            const graphsDiv = document.getElementById('graphs');
+            graphsDiv.innerHTML = '';
+            charts = {};
+            
+            selectedSignals.forEach((signal, index) => {
+                const container = document.createElement('div');
+                container.className = 'graph-container';
+                
+                const canvas = document.createElement('canvas');
+                canvas.id = 'chart-' + index;
+                
+                container.innerHTML = '<h3>' + signal.name + 
+                    ' (0x' + signal.messageId.toString(16).toUpperCase() + ')' +
+                    (signal.unit ? ' [' + signal.unit + ']' : '') + '</h3>';
+                container.appendChild(canvas);
+                graphsDiv.appendChild(container);
+                
+                const ctx = canvas.getContext('2d');
+                charts[index] = new Chart(ctx, {
+                    type: 'line',
+                    data: {
+                        labels: [],
+                        datasets: [{
+                            label: signal.name,
+                            data: [],
+                            borderColor: COLORS[index % COLORS.length],
+                            backgroundColor: COLORS[index % COLORS.length] + '33',
+                            tension: 0.4,
+                            fill: true
+                        }]
+                    },
+                    options: {
+                        responsive: true,
+                        maintainAspectRatio: false,
+                        scales: {
+                            x: { 
+                                display: true,
+                                title: { display: true, text: 'Time' }
+                            },
+                            y: { 
+                                display: true,
+                                title: { display: true, text: signal.unit || 'Value' }
+                            }
+                        },
+                        animation: false
+                    }
+                });
+            });
+        }
+        
+        function processCANData(messages) {
+            const now = new Date().toLocaleTimeString();
+            
+            messages.forEach(canMsg => {
+                const msgId = parseInt(canMsg.id, 16);
+                
+                selectedSignals.forEach((signal, index) => {
+                    if (signal.messageId === msgId && charts[index]) {
+                        const value = decodeSignal(signal, canMsg.data);
+                        
+                        const chart = charts[index];
+                        chart.data.labels.push(now);
+                        chart.data.datasets[0].data.push(value);
+                        
+                        if (chart.data.labels.length > MAX_DATA_POINTS) {
+                            chart.data.labels.shift();
+                            chart.data.datasets[0].data.shift();
+                        }
+                        
+                        chart.update('none');
+                    }
+                });
+            });
+        }
+        
+        function decodeSignal(signal, hexData) {
+            const bytes = [];
+            for (let i = 0; i < hexData.length; i += 3) {
+                bytes.push(parseInt(hexData.substr(i, 2), 16));
+            }
+            
+            let rawValue = 0;
+            const startByte = Math.floor(signal.startBit / 8);
+            const startBitInByte = signal.startBit % 8;
+            
+            if (signal.byteOrder === 'intel') {
+                for (let i = 0; i < signal.bitLength; i++) {
+                    const bitPos = signal.startBit + i;
+                    const byteIdx = Math.floor(bitPos / 8);
+                    const bitIdx = bitPos % 8;
+                    
+                    if (byteIdx < bytes.length) {
+                        const bit = (bytes[byteIdx] >> bitIdx) & 1;
+                        rawValue |= (bit << i);
+                    }
+                }
+            } else {
+                for (let i = 0; i < signal.bitLength; i++) {
+                    const bitPos = signal.startBit - i;
+                    const byteIdx = Math.floor(bitPos / 8);
+                    const bitIdx = bitPos % 8;
+                    
+                    if (byteIdx < bytes.length) {
+                        const bit = (bytes[byteIdx] >> bitIdx) & 1;
+                        rawValue |= (bit << (signal.bitLength - 1 - i));
+                    }
+                }
+            }
+            
+            if (signal.signed && (rawValue & (1 << (signal.bitLength - 1)))) {
+                rawValue -= (1 << signal.bitLength);
+            }
+            
+            return rawValue * signal.factor + signal.offset;
+        }
+        
+        function showStatus(message, type) {
+            const status = document.getElementById('status');
+            status.textContent = message;
+            status.className = 'status ' + type;
+            status.style.display = 'block';
+            setTimeout(() => { status.style.display = 'none'; }, 5000);
+        }
+        
+        const uploadArea = document.querySelector('.upload-area');
+        ['dragenter', 'dragover', 'dragleave', 'drop'].forEach(eventName => {
+            uploadArea.addEventListener(eventName, preventDefaults, false);
+        });
+        
+        function preventDefaults(e) {
+            e.preventDefault();
+            e.stopPropagation();
+        }
+        
+        ['dragenter', 'dragover'].forEach(eventName => {
+            uploadArea.addEventListener(eventName, () => {
+                uploadArea.style.borderColor = '#185a9d';
+                uploadArea.style.background = '#f0f9ff';
+            });
+        });
+        
+        ['dragleave', 'drop'].forEach(eventName => {
+            uploadArea.addEventListener(eventName, () => {
+                uploadArea.style.borderColor = '#43cea2';
+                uploadArea.style.background = '';
+            });
+        });
+        
+        uploadArea.addEventListener('drop', function(e) {
+            const file = e.dataTransfer.files[0];
+            if (file && file.name.endsWith('.dbc')) {
+                const reader = new FileReader();
+                reader.onload = function(ev) {
+                    parseDBCContent(ev.target.result);
+                };
+                reader.readAsText(file);
+            }
+        });
+        
+        initWebSocket();
+    </script>
+</body>
+</html>
+)rawliteral";
+
+#endif
\ No newline at end of file
diff --git a/index.h b/index.h
index 14be40b..ddffeeb 100644
--- a/index.h
+++ b/index.h
@@ -6,7 +6,7 @@ const char index_html[] PROGMEM = R"rawliteral(
 <html>
 <head>
     <meta charset="UTF-8">
-    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
     <title>ESP32 CAN Logger</title>
     <style>
         * { margin: 0; padding: 0; box-sizing: border-box; }
@@ -14,7 +14,7 @@ const char index_html[] PROGMEM = R"rawliteral(
             font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
             background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
             min-height: 100vh;
-            padding: 20px;
+            padding: 10px;
         }
         .container {
             max-width: 1400px;
@@ -27,64 +27,68 @@ const char index_html[] PROGMEM = R"rawliteral(
         .header {
             background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
             color: white;
-            padding: 30px;
+            padding: 20px;
             text-align: center;
         }
-        .header h1 { font-size: 2.5em; margin-bottom: 10px; }
-        .header p { opacity: 0.9; font-size: 1.1em; }
+        .header h1 { font-size: 1.8em; margin-bottom: 5px; }
+        .header p { opacity: 0.9; font-size: 0.9em; }
         .nav {
             background: #2c3e50;
-            padding: 15px 30px;
+            padding: 10px;
             display: flex;
-            gap: 20px;
+            gap: 10px;
+            flex-wrap: wrap;
+            justify-content: center;
         }
         .nav a {
             color: white;
             text-decoration: none;
-            padding: 10px 20px;
+            padding: 10px 15px;
             border-radius: 5px;
             transition: all 0.3s;
+            font-size: 0.9em;
+            white-space: nowrap;
         }
         .nav a:hover { background: #34495e; }
         .nav a.active { background: #3498db; }
-        .content { padding: 30px; }
+        .content { padding: 15px; }
         .status-grid {
             display: grid;
-            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
-            gap: 20px;
-            margin-bottom: 30px;
+            grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
+            gap: 10px;
+            margin-bottom: 20px;
         }
         .status-card {
             background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
             color: white;
-            padding: 20px;
+            padding: 15px;
             border-radius: 10px;
             text-align: center;
         }
-        .status-card h3 { font-size: 0.9em; opacity: 0.9; margin-bottom: 10px; }
-        .status-card .value { font-size: 2em; font-weight: bold; }
+        .status-card h3 { font-size: 0.75em; opacity: 0.9; margin-bottom: 8px; }
+        .status-card .value { font-size: 1.5em; font-weight: bold; word-break: break-all; }
         .status-on { background: linear-gradient(135deg, #11998e 0%, #38ef7d 100%) !important; }
         .status-off { background: linear-gradient(135deg, #eb3349 0%, #f45c43 100%) !important; }
         .control-panel {
             background: #f8f9fa;
-            padding: 20px;
+            padding: 15px;
             border-radius: 10px;
-            margin-bottom: 30px;
+            margin-bottom: 20px;
         }
         .control-row {
             display: flex;
-            gap: 15px;
+            gap: 10px;
             align-items: center;
             flex-wrap: wrap;
-            margin-bottom: 15px;
+            margin-bottom: 10px;
         }
         .control-row:last-child { margin-bottom: 0; }
-        label { font-weight: 600; color: #333; }
+        label { font-weight: 600; color: #333; font-size: 0.9em; }
         select, button {
-            padding: 10px 20px;
+            padding: 8px 15px;
             border: none;
             border-radius: 5px;
-            font-size: 1em;
+            font-size: 0.9em;
             cursor: pointer;
             transition: all 0.3s;
         }
@@ -103,11 +107,13 @@ const char index_html[] PROGMEM = R"rawliteral(
         .can-table-container {
             background: #f8f9fa;
             border-radius: 10px;
-            padding: 20px;
+            padding: 10px;
             overflow-x: auto;
+            -webkit-overflow-scrolling: touch;
         }
         table {
             width: 100%;
+            min-width: 500px;
             border-collapse: collapse;
             background: white;
             border-radius: 8px;
@@ -116,14 +122,16 @@ const char index_html[] PROGMEM = R"rawliteral(
         th {
             background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
             color: white;
-            padding: 15px;
+            padding: 10px 8px;
             text-align: left;
             font-weight: 600;
+            font-size: 0.85em;
         }
         td {
-            padding: 12px 15px;
+            padding: 8px;
             border-bottom: 1px solid #e9ecef;
             font-family: 'Courier New', monospace;
+            font-size: 0.8em;
         }
         tr:hover { background: #f8f9fa; }
         .flash-row {
@@ -136,50 +144,69 @@ const char index_html[] PROGMEM = R"rawliteral(
         .mono { font-family: 'Courier New', monospace; }
         h2 {
             color: #333;
-            margin: 30px 0 20px 0;
-            padding-bottom: 10px;
+            margin: 20px 0 15px 0;
+            padding-bottom: 8px;
             border-bottom: 3px solid #667eea;
+            font-size: 1.3em;
         }
         .file-list {
             background: #f8f9fa;
             border-radius: 10px;
-            padding: 20px;
+            padding: 15px;
         }
         .file-item {
             background: white;
-            padding: 15px;
-            margin-bottom: 10px;
+            padding: 12px;
+            margin-bottom: 8px;
             border-radius: 8px;
             display: flex;
             justify-content: space-between;
             align-items: center;
             transition: all 0.3s;
+            flex-wrap: wrap;
+            gap: 10px;
         }
         .file-item:hover { transform: translateX(5px); box-shadow: 0 3px 10px rgba(0,0,0,0.1); }
-        .file-name { font-weight: 600; color: #333; }
-        .file-size { color: #666; margin-left: 15px; }
+        .file-name { font-weight: 600; color: #333; font-size: 0.9em; }
+        .file-size { color: #666; margin-left: 10px; font-size: 0.85em; }
         .download-btn {
-            padding: 8px 16px;
-            font-size: 0.9em;
+            padding: 6px 12px;
+            font-size: 0.85em;
+        }
+        
+        @media (max-width: 768px) {
+            body { padding: 5px; }
+            .header h1 { font-size: 1.5em; }
+            .header p { font-size: 0.85em; }
+            .content { padding: 10px; }
+            .status-grid { grid-template-columns: repeat(2, 1fr); gap: 8px; }
+            .status-card { padding: 10px; }
+            .status-card h3 { font-size: 0.7em; }
+            .status-card .value { font-size: 1.2em; }
+            h2 { font-size: 1.1em; }
+            .nav a { padding: 8px 12px; font-size: 0.85em; }
+            table { min-width: 400px; }
+            th, td { padding: 6px 4px; font-size: 0.75em; }
         }
     </style>
 </head>
 <body>
     <div class="container">
         <div class="header">
-            <h1>🚗 ESP32 CAN Logger</h1>
+            <h1>ESP32 CAN Logger</h1>
             <p>Real-time CAN Bus Monitor & Data Logger</p>
         </div>
         
         <div class="nav">
-            <a href="/" class="active">📊 Monitor</a>
-            <a href="/transmit">📡 Transmit</a>
+            <a href="/" class="active">Monitor</a>
+            <a href="/transmit">Transmit</a>
+            <a href="/graph">Graph</a>
         </div>
         
         <div class="content">
             <div class="status-grid">
                 <div class="status-card" id="logging-status">
-                    <h3>LOGGING STATUS</h3>
+                    <h3>LOGGING</h3>
                     <div class="value">OFF</div>
                 </div>
                 <div class="status-card" id="sd-status">
@@ -192,16 +219,16 @@ const char index_html[] PROGMEM = R"rawliteral(
                 </div>
                 <div class="status-card">
                     <h3>SPEED</h3>
-                    <div class="value" id="msg-speed">0 msg/s</div>
+                    <div class="value" id="msg-speed">0/s</div>
                 </div>
                 <div class="status-card" id="file-status" style="grid-column: span 2;">
                     <h3>CURRENT FILE</h3>
-                    <div class="value" id="current-file" style="font-size: 1.3em;">-</div>
+                    <div class="value" id="current-file" style="font-size: 1em;">-</div>
                 </div>
             </div>
             
             <div class="control-panel">
-                <h2>⚙️ Control Panel</h2>
+                <h2>Control Panel</h2>
                 <div class="control-row">
                     <label for="can-speed">CAN Speed:</label>
                     <select id="can-speed">
@@ -210,33 +237,33 @@ const char index_html[] PROGMEM = R"rawliteral(
                         <option value="2">500 Kbps</option>
                         <option value="3" selected>1 Mbps</option>
                     </select>
-                    <button onclick="setCanSpeed()">Apply Speed</button>
+                    <button onclick="setCanSpeed()">Apply</button>
                 </div>
                 <div class="control-row">
-                    <button onclick="refreshFiles()">🔄 Refresh Files</button>
-                    <button onclick="clearMessages()">🗑️ Clear Display</button>
+                    <button onclick="refreshFiles()">Refresh Files</button>
+                    <button onclick="clearMessages()">Clear Display</button>
                 </div>
             </div>
             
-            <h2>📊 Real-time CAN Messages (by ID)</h2>
+            <h2>CAN Messages (by ID)</h2>
             <div class="can-table-container">
                 <table>
                     <thead>
                         <tr>
-                            <th>CAN ID</th>
+                            <th>ID</th>
                             <th>DLC</th>
                             <th>Data</th>
                             <th>Count</th>
-                            <th>Last Time (ms)</th>
+                            <th>Time(ms)</th>
                         </tr>
                     </thead>
                     <tbody id="can-messages"></tbody>
                 </table>
             </div>
             
-            <h2>💾 Log Files</h2>
+            <h2>Log Files</h2>
             <div class="file-list" id="file-list">
-                <p style="text-align: center; color: #666;">Loading files...</p>
+                <p style="text-align: center; color: #666; font-size: 0.9em;">Loading...</p>
             </div>
         </div>
     </div>
@@ -263,7 +290,6 @@ const char index_html[] PROGMEM = R"rawliteral(
             
             ws.onmessage = function(event) {
                 const data = JSON.parse(event.data);
-                console.log('수신:', data.type);
                 
                 if (data.type === 'status') {
                     updateStatus(data);
@@ -272,10 +298,9 @@ const char index_html[] PROGMEM = R"rawliteral(
                 } else if (data.type === 'canBatch') {
                     updateCanBatch(data.messages);
                 } else if (data.type === 'files') {
-                    console.log('파일 목록 수신:', data.files ? data.files.length : 0);
                     if (data.error) {
                         document.getElementById('file-list').innerHTML = 
-                            '<p style="text-align: center; color: #e74c3c;">Error: ' + data.error + '</p>';
+                            '<p style="text-align: center; color: #e74c3c; font-size: 0.9em;">Error: ' + data.error + '</p>';
                     } else {
                         updateFileList(data.files);
                     }
@@ -318,7 +343,7 @@ const char index_html[] PROGMEM = R"rawliteral(
             }
             
             document.getElementById('msg-count').textContent = data.msgCount.toLocaleString();
-            document.getElementById('msg-speed').textContent = data.msgSpeed + ' msg/s';
+            document.getElementById('msg-speed').textContent = data.msgSpeed + '/s';
         }
         
         function addCanMessage(data) {
@@ -387,7 +412,7 @@ const char index_html[] PROGMEM = R"rawliteral(
             const fileList = document.getElementById('file-list');
             
             if (!files || files.length === 0) {
-                fileList.innerHTML = '<p style="text-align: center; color: #666;">No log files found</p>';
+                fileList.innerHTML = '<p style="text-align: center; color: #666; font-size: 0.9em;">No log files</p>';
                 return;
             }
             
@@ -402,15 +427,13 @@ const char index_html[] PROGMEM = R"rawliteral(
                 const fileItem = document.createElement('div');
                 fileItem.className = 'file-item';
                 fileItem.innerHTML = 
-                    '<div>' +
-                        '<span class="file-name">📄 ' + file.name + '</span>' +
+                    '<div style="flex: 1; min-width: 0;">' +
+                        '<span class="file-name">' + file.name + '</span>' +
                         '<span class="file-size">(' + formatBytes(file.size) + ')</span>' +
                     '</div>' +
-                    '<button class="download-btn" onclick="downloadFile(\'' + file.name + '\')">⬇ Download</button>';
+                    '<button class="download-btn" onclick="downloadFile(\'' + file.name + '\')">Download</button>';
                 fileList.appendChild(fileItem);
             });
-            
-            console.log('파일 목록 업데이트: ' + files.length + '개 (최신순)');
         }
         
         function formatBytes(bytes) {
@@ -427,11 +450,6 @@ const char index_html[] PROGMEM = R"rawliteral(
         function refreshFiles() {
             if (ws && ws.readyState === WebSocket.OPEN) {
                 ws.send(JSON.stringify({cmd: 'getFiles'}));
-                console.log('파일 목록 요청 전송');
-            } else {
-                console.log('WebSocket 연결 안 됨');
-                document.getElementById('file-list').innerHTML = 
-                    '<p style="text-align: center; color: #e74c3c;">WebSocket not connected. Reconnecting...</p>';
             }
         }
         
@@ -446,12 +464,7 @@ const char index_html[] PROGMEM = R"rawliteral(
         }
         
         initWebSocket();
-        setTimeout(() => {
-            if (!document.getElementById('file-list').querySelector('.file-item')) {
-                console.log('파일 목록 재요청');
-                refreshFiles();
-            }
-        }, 2000);
+        setTimeout(() => { refreshFiles(); }, 2000);
     </script>
 </body>
 </html>
diff --git a/transmit.h b/transmit.h
index bb1659a..c8600bd 100644
--- a/transmit.h
+++ b/transmit.h
@@ -6,7 +6,7 @@ const char transmit_html[] PROGMEM = R"rawliteral(
 <html>
 <head>
     <meta charset="UTF-8">
-    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0, user-scalable=no">
     <title>CAN Transmitter</title>
     <style>
         * { margin: 0; padding: 0; box-sizing: border-box; }
@@ -14,7 +14,7 @@ const char transmit_html[] PROGMEM = R"rawliteral(
             font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
             background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
             min-height: 100vh;
-            padding: 20px;
+            padding: 10px;
         }
         .container {
             max-width: 1200px;
@@ -27,39 +27,42 @@ const char transmit_html[] PROGMEM = R"rawliteral(
         .header {
             background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
             color: white;
-            padding: 30px;
+            padding: 20px;
             text-align: center;
         }
-        .header h1 { font-size: 2.5em; margin-bottom: 10px; }
-        .header p { opacity: 0.9; font-size: 1.1em; }
+        .header h1 { font-size: 1.8em; margin-bottom: 5px; }
+        .header p { opacity: 0.9; font-size: 0.9em; }
         .nav {
             background: #2c3e50;
-            padding: 15px 30px;
+            padding: 10px;
             display: flex;
-            gap: 20px;
+            gap: 10px;
+            flex-wrap: wrap;
+            justify-content: center;
         }
         .nav a {
             color: white;
             text-decoration: none;
-            padding: 10px 20px;
+            padding: 10px 15px;
             border-radius: 5px;
             transition: all 0.3s;
+            font-size: 0.9em;
         }
         .nav a:hover { background: #34495e; }
         .nav a.active { background: #3498db; }
-        .content { padding: 30px; }
+        .content { padding: 15px; }
         
         .message-form {
             background: #f8f9fa;
-            padding: 25px;
+            padding: 20px;
             border-radius: 10px;
             margin-bottom: 20px;
         }
         .form-row {
             display: grid;
             grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
-            gap: 15px;
-            margin-bottom: 15px;
+            gap: 12px;
+            margin-bottom: 12px;
         }
         .form-group {
             display: flex;
@@ -69,12 +72,13 @@ const char transmit_html[] PROGMEM = R"rawliteral(
             font-weight: 600;
             margin-bottom: 5px;
             color: #333;
+            font-size: 0.9em;
         }
         .form-group input, .form-group select {
             padding: 10px;
             border: 2px solid #ddd;
             border-radius: 5px;
-            font-size: 1em;
+            font-size: 0.95em;
             font-family: 'Courier New', monospace;
         }
         .form-group input:focus, .form-group select:focus {
@@ -83,18 +87,22 @@ const char transmit_html[] PROGMEM = R"rawliteral(
         }
         .data-bytes {
             display: grid;
-            grid-template-columns: repeat(8, 1fr);
-            gap: 10px;
+            grid-template-columns: repeat(auto-fit, minmax(45px, 1fr));
+            gap: 8px;
+            max-width: 100%;
         }
         .data-bytes input {
             text-align: center;
             text-transform: uppercase;
+            width: 100%;
+            min-width: 45px;
+            padding: 10px 5px;
         }
         .btn {
-            padding: 12px 25px;
+            padding: 12px 20px;
             border: none;
             border-radius: 5px;
-            font-size: 1em;
+            font-size: 0.95em;
             font-weight: 600;
             cursor: pointer;
             transition: all 0.3s;
@@ -116,16 +124,16 @@ const char transmit_html[] PROGMEM = R"rawliteral(
         .message-list {
             background: #f8f9fa;
             border-radius: 10px;
-            padding: 20px;
+            padding: 15px;
         }
         .message-item {
             background: white;
-            padding: 15px;
+            padding: 12px;
             margin-bottom: 10px;
             border-radius: 8px;
             display: grid;
-            grid-template-columns: 100px 80px 1fr 150px 120px;
-            gap: 15px;
+            grid-template-columns: 90px 70px 1fr auto;
+            gap: 10px;
             align-items: center;
             border-left: 4px solid #f093fb;
         }
@@ -133,66 +141,129 @@ const char transmit_html[] PROGMEM = R"rawliteral(
             border-left-color: #38ef7d;
             background: #f0fff4;
         }
-        .message-id { font-weight: 700; color: #f5576c; font-family: 'Courier New', monospace; }
+        .message-id { 
+            font-weight: 700; 
+            color: #f5576c; 
+            font-family: 'Courier New', monospace;
+            font-size: 0.9em;
+        }
         .message-type { 
-            padding: 5px 10px;
+            padding: 4px 8px;
             border-radius: 5px;
-            font-size: 0.85em;
+            font-size: 0.75em;
             font-weight: 600;
             text-align: center;
         }
         .type-std { background: #3498db; color: white; }
         .type-ext { background: #9b59b6; color: white; }
-        .message-data { font-family: 'Courier New', monospace; color: #666; }
-        .message-interval { color: #888; font-size: 0.9em; }
+        .message-data { 
+            font-family: 'Courier New', monospace; 
+            color: #666;
+            font-size: 0.85em;
+            word-break: break-all;
+        }
+        .message-interval { 
+            color: #888; 
+            font-size: 0.8em;
+        }
         .message-controls {
             display: flex;
             gap: 5px;
+            flex-wrap: wrap;
         }
         .btn-small {
-            padding: 5px 12px;
-            font-size: 0.85em;
+            padding: 6px 12px;
+            font-size: 0.8em;
         }
         
         h2 {
             color: #333;
-            margin: 30px 0 20px 0;
-            padding-bottom: 10px;
+            margin: 20px 0 15px 0;
+            padding-bottom: 8px;
             border-bottom: 3px solid #f093fb;
+            font-size: 1.3em;
         }
         
         .status-bar {
             background: #2c3e50;
             color: white;
-            padding: 10px 20px;
+            padding: 10px 15px;
             border-radius: 5px;
-            margin-bottom: 20px;
+            margin-bottom: 15px;
             display: flex;
             justify-content: space-between;
             align-items: center;
+            font-size: 0.9em;
         }
         .status-bar span { font-weight: 600; }
+        
+        @media (max-width: 768px) {
+            body { padding: 5px; }
+            .header h1 { font-size: 1.5em; }
+            .content { padding: 10px; }
+            .form-row { grid-template-columns: 1fr; }
+            .data-bytes { 
+                grid-template-columns: repeat(4, 1fr); 
+                gap: 6px; 
+            }
+            .data-bytes input { 
+                min-width: 40px; 
+                font-size: 0.9em;
+                padding: 8px 4px;
+            }
+            .message-item { 
+                grid-template-columns: 1fr;
+                gap: 8px;
+            }
+            .message-controls { 
+                justify-content: flex-start; 
+            }
+            .control-row { 
+                flex-direction: column; 
+                align-items: stretch; 
+            }
+            .control-row > * { 
+                width: 100%; 
+            }
+            .nav { 
+                padding: 8px; 
+                gap: 5px; 
+            }
+            .nav a { 
+                padding: 8px 10px; 
+                font-size: 0.85em; 
+            }
+            h2 { 
+                font-size: 1.1em; 
+            }
+            .status-bar {
+                flex-direction: column;
+                gap: 8px;
+                text-align: center;
+            }
+        }
     </style>
 </head>
 <body>
     <div class="container">
         <div class="header">
-            <h1>📡 CAN Transmitter</h1>
+            <h1>CAN Transmitter</h1>
             <p>Send CAN Messages</p>
         </div>
         
         <div class="nav">
-            <a href="/">📊 Monitor</a>
-            <a href="/transmit" class="active">📡 Transmit</a>
+            <a href="/">Monitor</a>
+            <a href="/transmit" class="active">Transmit</a>
+            <a href="/graph">Graph</a>
         </div>
         
         <div class="content">
             <div class="status-bar">
-                <span id="connection-status">🔴 Disconnected</span>
-                <span id="tx-count">Sent: 0 messages</span>
+                <span id="connection-status">Disconnected</span>
+                <span id="tx-count">Sent: 0</span>
             </div>
             
-            <h2>➕ Add CAN Message</h2>
+            <h2>Add CAN Message</h2>
             <div class="message-form">
                 <div class="form-row">
                     <div class="form-group">
@@ -200,10 +271,10 @@ const char transmit_html[] PROGMEM = R"rawliteral(
                         <input type="text" id="can-id" placeholder="123" maxlength="8">
                     </div>
                     <div class="form-group">
-                        <label>Message Type</label>
+                        <label>Type</label>
                         <select id="msg-type">
-                            <option value="std">Standard (11-bit)</option>
-                            <option value="ext">Extended (29-bit)</option>
+                            <option value="std">Standard</option>
+                            <option value="ext">Extended</option>
                         </select>
                     </div>
                     <div class="form-group">
@@ -240,21 +311,21 @@ const char transmit_html[] PROGMEM = R"rawliteral(
                     </div>
                 </div>
                 
-                <div style="display: flex; gap: 10px;">
-                    <button class="btn btn-primary" onclick="addMessage()">➕ Add to List</button>
-                    <button class="btn btn-success" onclick="sendOnce()">📤 Send Once</button>
+                <div style="display: flex; gap: 10px; flex-wrap: wrap;">
+                    <button class="btn btn-primary" onclick="addMessage()">Add to List</button>
+                    <button class="btn btn-success" onclick="sendOnce()">Send Once</button>
                 </div>
             </div>
             
-            <h2>📋 Message List</h2>
-            <div style="margin-bottom: 15px; display: flex; gap: 10px;">
-                <button class="btn btn-success" onclick="startAll()">▶️ Start All</button>
-                <button class="btn btn-danger" onclick="stopAll()">⏹️ Stop All</button>
-                <button class="btn btn-danger" onclick="clearAll()">🗑️ Clear All</button>
+            <h2>Message List</h2>
+            <div style="margin-bottom: 15px; display: flex; gap: 10px; flex-wrap: wrap;">
+                <button class="btn btn-success" onclick="startAll()">Start All</button>
+                <button class="btn btn-danger" onclick="stopAll()">Stop All</button>
+                <button class="btn btn-danger" onclick="clearAll()">Clear All</button>
             </div>
             
             <div class="message-list" id="message-list">
-                <p style="text-align: center; color: #666;">No messages added yet</p>
+                <p style="text-align: center; color: #666; font-size: 0.9em;">No messages added yet</p>
             </div>
         </div>
     </div>
@@ -269,12 +340,12 @@ const char transmit_html[] PROGMEM = R"rawliteral(
             
             ws.onopen = function() {
                 console.log('WebSocket connected');
-                document.getElementById('connection-status').innerHTML = '🟢 Connected';
+                document.getElementById('connection-status').innerHTML = 'Connected';
             };
             
             ws.onclose = function() {
                 console.log('WebSocket disconnected');
-                document.getElementById('connection-status').innerHTML = '🔴 Disconnected';
+                document.getElementById('connection-status').innerHTML = 'Disconnected';
                 setTimeout(initWebSocket, 3000);
             };
             
@@ -282,7 +353,7 @@ const char transmit_html[] PROGMEM = R"rawliteral(
                 const data = JSON.parse(event.data);
                 if (data.type === 'txStatus') {
                     txCount = data.count;
-                    document.getElementById('tx-count').textContent = 'Sent: ' + txCount + ' messages';
+                    document.getElementById('tx-count').textContent = 'Sent: ' + txCount;
                 }
             };
         }
@@ -294,7 +365,7 @@ const char transmit_html[] PROGMEM = R"rawliteral(
             const interval = parseInt(document.getElementById('interval').value);
             
             if (!id || !/^[0-9A-F]+$/.test(id)) {
-                alert('Invalid CAN ID! Use hex format (e.g., 123, 1A2)');
+                alert('Invalid CAN ID!');
                 return;
             }
             
@@ -302,7 +373,7 @@ const char transmit_html[] PROGMEM = R"rawliteral(
             for (let i = 0; i < 8; i++) {
                 const val = document.getElementById('d' + i).value.toUpperCase();
                 if (!/^[0-9A-F]{0,2}$/.test(val)) {
-                    alert('Invalid data byte D' + i + '! Use hex format (00-FF)');
+                    alert('Invalid data byte D' + i + '!');
                     return;
                 }
                 data.push(val.padStart(2, '0'));
@@ -343,14 +414,13 @@ const char transmit_html[] PROGMEM = R"rawliteral(
                 data: data.join('')
             };
             ws.send(JSON.stringify(cmd));
-            console.log('Sent:', cmd);
         }
         
         function updateMessageList() {
             const list = document.getElementById('message-list');
             
             if (messages.length === 0) {
-                list.innerHTML = '<p style="text-align: center; color: #666;">No messages added yet</p>';
+                list.innerHTML = '<p style="text-align: center; color: #666; font-size: 0.9em;">No messages</p>';
                 return;
             }
             
@@ -359,21 +429,16 @@ const char transmit_html[] PROGMEM = R"rawliteral(
                 const item = document.createElement('div');
                 item.className = 'message-item' + (msg.active ? ' active' : '');
                 
-                item.innerHTML = `
-                    <div class="message-id">0x${msg.id}</div>
-                    <div class="message-type type-${msg.type}">${msg.type.toUpperCase()}</div>
-                    <div class="message-data">${msg.data.slice(0, msg.dlc).join(' ')}</div>
-                    <div class="message-interval">Every ${msg.interval}ms</div>
-                    <div class="message-controls">
-                        <button class="btn ${msg.active ? 'btn-danger' : 'btn-success'} btn-small" 
-                                onclick="toggleMessage(${index})">
-                            ${msg.active ? '⏹️ Stop' : '▶️ Start'}
-                        </button>
-                        <button class="btn btn-danger btn-small" onclick="deleteMessage(${index})">
-                            🗑️
-                        </button>
-                    </div>
-                `;
+                item.innerHTML = 
+                    '<div class="message-id">0x' + msg.id + '</div>' +
+                    '<div class="message-type type-' + msg.type + '">' + msg.type.toUpperCase() + '</div>' +
+                    '<div class="message-data">' + msg.data.slice(0, msg.dlc).join(' ') + '</div>' +
+                    '<div class="message-controls">' +
+                        '<button class="btn ' + (msg.active ? 'btn-danger' : 'btn-success') + ' btn-small" onclick="toggleMessage(' + index + ')">' +
+                            (msg.active ? 'Stop' : 'Start') +
+                        '</button>' +
+                        '<button class="btn btn-danger btn-small" onclick="deleteMessage(' + index + ')">Delete</button>' +
+                    '</div>';
                 
                 list.appendChild(item);
             });
@@ -426,7 +491,6 @@ const char transmit_html[] PROGMEM = R"rawliteral(
             }
         }
         
-        // Hex input validation
         document.querySelectorAll('input[id^="d"]').forEach(input => {
             input.addEventListener('input', function() {
                 this.value = this.value.toUpperCase().replace(/[^0-9A-F]/g, '');
