rss/decoder at main · dionma2020/rss · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Live Tone Decoder</title>
<style>
    body { font-family: Arial, sans-serif; background: #111; color: #0f0; text-align: center; }
    h1 { color: #0f0; }
    #log { white-space: pre; font-family: monospace; margin-top: 20px; }
</style>
<script src="https://zello.com/js-sdk/1.0.0/zello.js"></script>
</head>
<body>
<h1>Live Tone Decoder</h1>
<div id="status">Connecting to Zello...</div>
<div id="log"></div>

<script>
const reffreq = {
    '1': 1124, '2': 1197, '3': 1275, '4': 1358, '5': 1446,
    '6': 1540, '7': 1640, '8': 1747, '9': 1860, '0': 1981,
    'A': 2400, 'B': 930, 'C': 2247, 'D': 991, 'E': 2110, 'F': 1055
};

let train = [];
let tonenone = 0;
let analyser, dataArray;

function checkfreq(freq) {
    for (let tone in reffreq) {
        if (freq >= reffreq[tone] - 10 && freq <= reffreq[tone] + 10) {
            return tone;
        }
    }
    return null;
}

function cleantrain(train) {
    let lasttone = null;
    let newtrain = [];
    for (let tone of train) {
        if (tone !== lasttone) newtrain.push(tone);
        lasttone = tone;
    }
    if (newtrain.length >= 6) {
        logSequence(newtrain);
    }
}

function logSequence(seq) {
    const ts = new Date().toISOString().replace("T", " ").substring(0, 19);
    document.getElementById("log").innerText += `${ts} ${seq.join("")}\n`;
}

function processAudio() {
    let bufferLength = analyser.frequencyBinCount;
    dataArray = new Uint8Array(bufferLength);
    analyser.getByteFrequencyData(dataArray);

    // Find peak frequency
    let maxIndex = 0;
    for (let i = 1; i < bufferLength; i++) {
        if (dataArray[i] > dataArray[maxIndex]) maxIndex = i;
    }
    let freq = maxIndex * (audioCtx.sampleRate / 2) / bufferLength;

    let tone = checkfreq(freq);
    if (tone) {
        train.push(tone);
    } else if (train.length && tonenone === 3) {
        cleantrain(train);
        train = [];
        tonenone = 0;
    } else if (train.length) {
        tonenone++;
    }

    requestAnimationFrame(processAudio);
}

// Zello SDK connection
let audioCtx = new (window.AudioContext || window.webkitAudioContext)();
let client = new Zello.Client();

client.connect({
    username: "anonymous", // Or your Zello Work account
    password: "",
    channel: "Fire Feed",
    auth_token: "53AB3CZ6UTSDR9SX4FSBXKCVC2BSNJCO",
    network: "fireandemergencynewzealand1"
}).then(() => {
    document.getElementById("status").innerText = "Connected to Zello";
    client.on('stream', stream => {
        let source = audioCtx.createMediaStreamSource(stream);
        analyser = audioCtx.createAnalyser();
        analyser.fftSize = 1024;
        source.connect(analyser);
        processAudio();
    });
}).catch(err => {
    document.getElementById("status").innerText = "Error: " + err;
});
</script>
</body>
</html>