javascript-telemetry/index.html at main · technimad-splunk/javascript-telemetry · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <!-- Discourage aggressive HTML/asset caching, especially on iOS Safari, so new
         deploys are picked up without the user having to clear site data. The
         server-side Cache-Control headers are still authoritative; these meta tags
         are a best-effort hint for clients that don't get that far. -->
    <meta http-equiv="Cache-Control" content="no-store, no-cache, must-revalidate, max-age=0">
    <meta http-equiv="Pragma" content="no-cache">
    <meta http-equiv="Expires" content="0">
    <title>Motion & GPS Telemetry</title>
    <style>
        body {
            font-family: Arial, sans-serif;
            margin: 0;
            padding: 20px;
            background-color: #f4f4f9;
        }
        h1 {
            color: #333;
        }
        p {
            margin-bottom: 15px;
        }
        label {
            display: inline-block;
            width: 150px;
            font-weight: bold;
        }
        input, button {
            padding: 8px;
            border-radius: 4px;
            border: 1px solid #ccc;
        }
        button {
            margin-left: 10px;
        }
        h2 {
            color: #555;
            margin-top: 30px;
        }
        footer {
            text-align: center;
            padding-top: 30px;
            border-top: 1px solid #ccc;
        }
    </style>
</head>
<body>
    <h1>Motion & GPS Telemetry</h1>
<p>
    <label for="name">Name:</label>
    <input type="text" id="name">
</p>
<p>
    <label for="interval">Telemetry Interval (ms):</label>
    <input type="number" id="interval" value="500" min="100">
</p>

<p>
    <button id="requestPermission" style="background-color: #4CAF50; color: white;">Start Sensors</button>
    <button id="pauseTracking" style="background-color: #ccc; color: black;">Pause Sensors</button>
</p>
    <h2>Accelerometer</h2>
    <p id="accel">Waiting for data...</p>

    <h2>Gyroscope</h2>
    <p id="gyro">Waiting for data...</p>

    <h2>GPS</h2>
    <p id="gps">Waiting for data...</p>

<footer>
	<p><small>Frontend version: <span id="version"></span></small></p>
</footer>

<script src="motion_capture.js?v=dev"></script>
<script>
    // iOS Safari aggressively restores pages from the back/forward cache (bfcache).
    // When a page is shown from bfcache, `event.persisted` is true and our scripts
    // never re-run, so a freshly deployed version is silently ignored. Force a
    // network reload in that case so users always run the current build.
    window.addEventListener('pageshow', (event) => {
        if (event.persisted) {
            window.location.reload();
        }
    });

    async function requestWakeLock() {
        if (!('wakeLock' in navigator)) {
            console.warn('Wake Lock API not supported in this browser.');
            return;
        }

        let wakeLock = null;

        async function acquire() {
            try {
                wakeLock = await navigator.wakeLock.request('screen');
                console.log('Wake Lock active');
            } catch (err) {
                console.error(err.name + ': ' + err.message);
            }
        }

        await acquire();

        document.addEventListener('visibilitychange', async () => {
            if (document.visibilityState === 'visible') {
                await acquire();
            }
        });
    }

    requestWakeLock();
</script>
</body>
</html>