node-config/index.html at main · Control-Freaks/node-config · GitHub

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<!DOCTYPE html>
<!--
  ble-config.html — Web Bluetooth field-configuration page.

  Works in Chrome / Edge on Android and desktop. (iOS Safari has no Web
  Bluetooth; use the Bluefy browser app or nRF Connect there.)

  Serve over HTTPS or open as a local file with Chrome flag allowances;
  easiest: host anywhere (GitHub Pages works) or run:  python3 -m http.server
  and open via http://localhost (localhost is exempt from the HTTPS rule).
-->
<html lang="en">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Field Config</title>
<style>
  :root { --accent:#0a7cff; --bg:#111418; --card:#1b2027; --text:#e8eaed; --mut:#9aa0a6; }
  * { box-sizing:border-box; font-family:system-ui,sans-serif; }
  body { margin:0; background:var(--bg); color:var(--text); }
  .wrap { max-width:480px; margin:0 auto; padding:16px; }
  h1 { font-size:1.2rem; margin:8px 0 16px; }
  .card { background:var(--card); border-radius:12px; padding:16px; margin-bottom:16px; }
  label { display:block; font-size:.8rem; color:var(--mut); margin:12px 0 4px; }
  input { width:100%; padding:10px; border-radius:8px; border:1px solid #333a44;
          background:#0d1013; color:var(--text); font-size:1rem; }
  button { width:100%; padding:12px; margin-top:12px; border:0; border-radius:8px;
           background:var(--accent); color:#fff; font-size:1rem; font-weight:600; }
  button.secondary { background:#2a313b; }
  button.danger { background:#b3261e; }
  button:disabled { opacity:.4; }
  #log { font-family:monospace; font-size:.75rem; color:var(--mut);
         white-space:pre-wrap; max-height:160px; overflow-y:auto; }
  .pill { display:inline-block; padding:2px 10px; border-radius:99px; font-size:.75rem; }
  .ok { background:#0f5132; } .off { background:#4a1b1a; }
</style>
</head>
<body>
<div class="wrap">
  <h1>Field Config <span id="state" class="pill off">disconnected</span></h1>

  <div class="card">
    <label>Device PIN (printed on the unit)</label>
    <input id="pin" type="tel" inputmode="numeric" maxlength="6" placeholder="6-digit PIN">
    <button id="btnConnect">Connect to device</button>
  </div>

  <div class="card" id="form" style="display:none">
    <label>Device name</label>
    <input id="dev_name" placeholder="north-gate">
    <label>Wi-Fi SSID</label>
    <input id="wifi_ssid">
    <label>Wi-Fi password</label>
    <input id="wifi_pass" type="password" placeholder="(unchanged if blank)">
    <label>MQTT host</label>
    <input id="mqtt_host" placeholder="mqtt.example.com">
    <label>MQTT port</label>
    <input id="mqtt_port" type="number" placeholder="8883">
    <label>MQTT username</label>
    <input id="mqtt_user">
    <label>MQTT password</label>
    <input id="mqtt_pass" type="password" placeholder="(unchanged if blank)">
    <label>Topic prefix</label>
    <input id="topic_prefix" placeholder="nodes">

    <button id="btnSave">Save &amp; reboot device</button>
    <button id="btnRefresh" class="secondary">Re-read device status</button>
    <button id="btnFactory" class="danger">Factory reset</button>
  </div>

  <div class="card"><div id="log"></div></div>
</div>

<script>
const SVC     = 'f1e0c001-2f1a-4b6e-9d3a-464331000001';
const CONFIG  = 'f1e0c001-2f1a-4b6e-9d3a-464331000002';
const STATUS  = 'f1e0c001-2f1a-4b6e-9d3a-464331000003';
const CONTROL = 'f1e0c001-2f1a-4b6e-9d3a-464331000004';

let dev = null, chConfig = null, chStatus = null, chControl = null;
const enc = new TextEncoder(), dec = new TextDecoder();
const $ = id => document.getElementById(id);
const log = m => { $('log').textContent += m + '\n'; $('log').scrollTop = 1e9; };

function setState(ok) {
  const el = $('state');
  el.textContent = ok ? 'connected' : 'disconnected';
  el.className = 'pill ' + (ok ? 'ok' : 'off');
  $('form').style.display = ok ? '' : 'none';
}

async function connect() {
  try {
    dev = await navigator.bluetooth.requestDevice({
      filters: [{ namePrefix: 'FC-' }],
      optionalServices: [SVC]
    });
    dev.addEventListener('gattserverdisconnected', () => { setState(false); log('Disconnected.'); });
    log('Connecting to ' + dev.name + '…');
    const server = await dev.gatt.connect();
    const svc = await server.getPrimaryService(SVC);
    chConfig  = await svc.getCharacteristic(CONFIG);
    chStatus  = await svc.getCharacteristic(STATUS);
    chControl = await svc.getCharacteristic(CONTROL);

    // Unlock with the device PIN before anything else.
    const pin = $('pin').value.trim();
    try {
      await chControl.writeValueWithResponse(enc.encode('pin:' + pin));
    } catch (_) {
      log('PIN rejected. Check the 6 digits on the unit label and retry.');
      dev.gatt.disconnect();
      return;
    }
    setState(true);
    log('Connected and unlocked.');
    await refresh();
  } catch (e) { log('Error: ' + e.message); }
}

async function refresh() {
  const raw = await chStatus.readValue();
  const st = JSON.parse(dec.decode(raw));
  if (st.locked) { log('Device is locked — wrong PIN.'); return; }
  log('Status: ' + JSON.stringify(st));
  $('dev_name').value    = st.dev_name ?? '';
  $('wifi_ssid').value   = st.wifi_ssid ?? '';
  $('mqtt_host').value   = st.mqtt_host ?? '';
  $('mqtt_port').value   = st.mqtt_port ?? 8883;
  $('mqtt_user').value   = st.mqtt_user ?? '';
  $('topic_prefix').value= st.topic_prefix ?? '';
  $('wifi_pass').placeholder = st.wifi_pass_set ? '(set — leave blank to keep)' : '';
  $('mqtt_pass').placeholder = st.mqtt_pass_set ? '(set — leave blank to keep)' : '';
}

// Write possibly-long payloads in MTU-safe chunks. Firmware treats a chunk
// starting with '{' as the start of a fresh document.
async function writeChunked(ch, str) {
  const bytes = enc.encode(str);
  const CHUNK = 180;
  for (let i = 0; i < bytes.length; i += CHUNK) {
    await ch.writeValueWithResponse(bytes.slice(i, i + CHUNK));
  }
}

async function save() {
  const cfg = {
    dev_name:     $('dev_name').value.trim(),
    wifi_ssid:    $('wifi_ssid').value.trim(),
    mqtt_host:    $('mqtt_host').value.trim(),
    mqtt_port:    parseInt($('mqtt_port').value) || 8883,
    mqtt_user:    $('mqtt_user').value.trim(),
    topic_prefix: $('topic_prefix').value.trim(),
  };
  // Blank password fields mean "keep existing" — omit the key entirely.
  if ($('wifi_pass').value) cfg.wifi_pass = $('wifi_pass').value;
  if ($('mqtt_pass').value) cfg.mqtt_pass = $('mqtt_pass').value;

  try {
    log('Writing config…');
    await writeChunked(chConfig, JSON.stringify(cfg));
    await chControl.writeValueWithResponse(enc.encode('save'));
    log('Saved. Rebooting device…');
    await chControl.writeValueWithResponse(enc.encode('reboot'));
  } catch (e) { log('Error: ' + e.message); }
}

async function factoryReset() {
  if (!confirm('Erase ALL stored settings on this device?')) return;
  try { await chControl.writeValueWithResponse(enc.encode('reset')); }
  catch (e) { /* device reboots mid-write; expected */ }
  log('Factory reset sent.');
}

$('btnConnect').onclick = connect;
$('btnSave').onclick = save;
$('btnRefresh').onclick = () => refresh().catch(e => log('Error: ' + e.message));
$('btnFactory').onclick = factoryReset;

if (!navigator.bluetooth) {
  log('This browser has no Web Bluetooth. Use Chrome on Android/desktop, or Bluefy on iOS.');
  $('btnConnect').disabled = true;
}
</script>
</body>
</html>