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web_graph.h
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247
web_graph.h
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#ifndef WEB_GRAPH_H
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#define WEB_GRAPH_H
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const char HTML_GRAPH[] = R"rawliteral(
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<!DOCTYPE html>
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<html>
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<head>
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<meta charset="UTF-8">
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
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<title>CAN FD Graph - ESP32 Logger</title>
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<script src="https://unpkg.com/uplot@1.6.24/dist/uPlot.iife.min.js"></script>
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<link rel="stylesheet" href="https://unpkg.com/uplot@1.6.24/dist/uPlot.min.css">
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<style>
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* { margin: 0; padding: 0; box-sizing: border-box; }
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body {
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font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
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background: #1a1a2e;
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color: #eee;
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line-height: 1.6;
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}
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.header {
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background: #16213e;
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padding: 1rem;
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text-align: center;
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border-bottom: 2px solid #e94560;
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}
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.header h1 { color: #e94560; font-size: 1.5rem; }
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.nav {
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background: #0f3460;
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padding: 0.5rem;
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display: flex;
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justify-content: center;
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flex-wrap: wrap;
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gap: 0.5rem;
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}
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.nav a {
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color: #fff;
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text-decoration: none;
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padding: 0.5rem 1rem;
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border-radius: 4px;
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transition: background 0.3s;
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}
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.nav a:hover, .nav a.active { background: #e94560; }
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.container {
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max-width: 1400px;
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margin: 0 auto;
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padding: 1rem;
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}
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.graph-container {
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background: #16213e;
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padding: 1rem;
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border-radius: 8px;
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margin-bottom: 1rem;
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}
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.controls {
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background: #16213e;
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padding: 1rem;
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border-radius: 8px;
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margin-bottom: 1rem;
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display: flex;
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gap: 1rem;
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flex-wrap: wrap;
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align-items: center;
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}
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.signal-list {
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display: flex;
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gap: 1rem;
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flex-wrap: wrap;
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}
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.signal-item {
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display: flex;
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align-items: center;
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gap: 0.5rem;
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}
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.signal-color {
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width: 16px;
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height: 16px;
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border-radius: 50%;
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}
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.btn {
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background: #e94560;
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color: #fff;
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border: none;
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padding: 0.5rem 1rem;
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border-radius: 4px;
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cursor: pointer;
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}
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.btn:hover { background: #ff6b6b; }
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#chart { margin-top: 1rem; }
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.uplot {
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background: #0f3460;
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border-radius: 4px;
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}
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</style>
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</head>
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<body>
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<div class="header">
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<h1>Real-time CAN Signal Graph</h1>
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</div>
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<nav class="nav">
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<a href="/">Dashboard</a>
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<a href="/graph" class="active">Graph</a>
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<a href="/files">Files</a>
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<a href="/can">CAN Transmit</a>
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<a href="/settings">Settings</a>
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</nav>
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<div class="container">
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<div class="controls">
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<button class="btn" onclick="togglePause()" id="btnPause">Pause</button>
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<button class="btn" onclick="clearGraph()">Clear</button>
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<div class="signal-list" id="signalList"></div>
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</div>
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<div class="graph-container">
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<div id="chart"></div>
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</div>
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</div>
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<script>
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let ws = null;
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let uplot = null;
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let paused = false;
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let maxPoints = 500;
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const colors = [
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'#e94560', '#00d9ff', '#f39c12', '#2ecc71',
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'#9b59b6', '#1abc9c', '#e74c3c', '#3498db',
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'#f1c40f', '#95a5a6'
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];
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let signals = [];
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let data = [[], [], [], [], [], [], [], [], [], [], []];
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function initChart() {
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const opts = {
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width: document.getElementById('chart').offsetWidth,
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height: 500,
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title: "CAN Signals",
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axes: [
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{ label: "Time" },
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{ label: "Value" }
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],
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scales: {
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x: { time: true },
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y: { auto: true }
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},
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series: [
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{ label: "Time" }
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]
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};
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for (let i = 0; i < 10; i++) {
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opts.series.push({
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label: `Signal ${i + 1}`,
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stroke: colors[i],
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width: 2
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});
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}
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uplot = new uPlot(opts, data, document.getElementById('chart'));
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}
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function connectWebSocket() {
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const host = window.location.hostname;
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const wsPort = 81;
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ws = new WebSocket('ws://' + host + ':' + wsPort);
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ws.onopen = () => console.log('WebSocket connected');
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ws.onclose = () => setTimeout(connectWebSocket, 3000);
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ws.onmessage = (e) => {
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const msg = JSON.parse(e.data);
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if (msg.type === 'signal') {
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msg.signals.forEach((sig, i) => {
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addPoint(sig.signal_id, sig.value, msg.timestamp);
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});
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}
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};
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}
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function updateGraph(msg) {
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const timestamp = msg.timestamp / 1000;
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// Add time to first series
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data[0].push(timestamp);
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// Add values for each signal
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for (let i = 0; i < 10; i++) {
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const signal = msg.signals[i];
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if (signal) {
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data[i + 1].push(signal.value);
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updateSignalList(i, signal.id, signal.value);
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} else {
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data[i + 1].push(null);
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}
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}
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// Keep only maxPoints
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if (data[0].length > maxPoints) {
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for (let i = 0; i < data.length; i++) {
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data[i].shift();
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}
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}
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uplot.setData(data);
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}
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function updateSignalList(index, id, value) {
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const list = document.getElementById('signalList');
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let item = document.getElementById('signal-' + index);
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if (!item) {
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item = document.createElement('div');
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item.className = 'signal-item';
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item.id = 'signal-' + index;
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item.innerHTML = `
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<div class="signal-color" style="background: ${colors[index]}"></div>
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<span id="signal-name-${index}">${id}</span>:
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<span id="signal-val-${index}">${value.toFixed(2)}</span>
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`;
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list.appendChild(item);
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} else {
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document.getElementById('signal-val-' + index).textContent = value.toFixed(2);
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}
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}
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function togglePause() {
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paused = !paused;
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document.getElementById('btnPause').textContent = paused ? 'Resume' : 'Pause';
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}
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function clearGraph() {
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data = [[], [], [], [], [], [], [], [], [], [], []];
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uplot.setData(data);
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document.getElementById('signalList').innerHTML = '';
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}
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window.addEventListener('resize', () => {
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uplot.setSize({
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width: document.getElementById('chart').offsetWidth,
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height: 500
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});
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});
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initChart();
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connectWebSocket();
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</script>
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</body>
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</html>
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)rawliteral";
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#endif // WEB_GRAPH_H
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