Function runArpScan

web/scripts/ragnar_modern.js:1721–1759

()

        btn.title = det.available
            ? `HackRF ready${det.board ? ' (' + det.board + ')' : ''} — true-RF waterfall`
            : (det.error || 'Connect a HackRF SDR to enable true-RF waterfall');
        _wifiFsSyncGates();
    }).catch(() => {});
}

function _wifiSdrStart() {
    const s = _wifiState.sdr;
    if (!s.available) { _wifiDrawWaterfall(); return; }
    s.rows = []; s.seq = 0; s.maxhold = null; s.error = null;
    // Match the SDR band to the analyzer's band selector where it's a real RF
    // band (2.4/5); 'all'/'6' fall back to 2.4.
    s.band = (_wifiState.band === '5') ? '5' : '2.4';
    fetch('/api/net/sdr/start', { method: 'POST', headers: { 'Content-Type': 'application/json' },
        body: JSON.stringify({ band: s.band }) })
        .then(r => r.json()).then(res => {
            if (res && res.error) { s.error = res.error; _wifiDrawWaterfall(); return; }
            if (s.poll) clearInterval(s.poll);
            s.running = true;
            s.poll = setInterval(_wifiSdrPoll, 400);
        }).catch(() => { s.error = 'Failed to start SDR'; _wifiDrawWaterfall(); });
}

function _wifiSdrStop() {
    const s = _wifiState.sdr;
    if (s.poll) { clearInterval(s.poll); s.poll = null; }
    s.running = false;
    fetch('/api/net/sdr/stop', { method: 'POST' }).catch(() => {});
}

function _wifiSdrPoll() {
    const s = _wifiState.sdr;
    fetch('/api/net/sdr/frames?since=' + s.seq).then(r => r.json()).then(d => {
        if (d.error) s.error = d.error;
        if (d.band_mhz) s.bandMhz = d.band_mhz;
        if (typeof d.floor_dbm === 'number') s.floor = d.floor_dbm;
        if (d.max_hold) s.maxhold = d.max_hold;
        (d.frames || []).forEach(f => { s.seq = f.seq; s.rows.unshift(f.power); });
        if (s.rows.length > 260) s.rows.length = 260;
        if (_wifiState.view === 'waterfall') _wifiDrawWaterfall();
    }).catch(() => {});
}