Hoe je een Node-RED-server instelt om NMEA op afstand te ontvangen

    
     [
  {
    "id": "tab1",
    "type": "tab",
    "label": "GNSS Live Map + Track",
    "disabled": false,
    "info": ""
  },
  {
    "id": "tcpInNmea2222",
    "type": "tcp in",
    "z": "tab1",
    "name": "NMEA TCP 2222",
    "server": "server",
    "host": "",
    "port": "2222",
    "datamode": "stream",
    "datatype": "utf8",
    "newline": "\\r\\n",
    "topic": "",
    "base64": false,
    "x": 150,
    "y": 140,
    "wires": [
      [
        "fnGGA"
      ]
    ]
  },
  {
    "id": "fnGGA",
    "type": "function",
    "z": "tab1",
    "name": "Filter GGA → {lat,lon}",
    "func": "// Allman style\nfunction nmeaToDecimal(raw, hemi)\n{\n    if (!raw || !hemi)\n    {\n        return null;\n    }\n    const isLat = (hemi === 'N' || hemi === 'S');\n    const degDigits = isLat ? 2 : 3;\n    const deg = parseInt(raw.slice(0, degDigits), 10);\n    const min = parseFloat(raw.slice(degDigits));\n    if (Number.isNaN(deg) || Number.isNaN(min))\n    {\n        return null;\n    }\n    let dec = deg + (min / 60.0);\n    if (hemi === 'S' || hemi === 'W')\n    {\n        dec = -dec;\n    }\n    return dec;\n}\n\nif (typeof msg.payload !== 'string')\n{\n    return null;\n}\n\nconst line = msg.payload.trim();\nif (!line.startsWith('$') || line.indexOf('GGA,') === -1)\n{\n    return null;\n}\n\nconst f = line.split(',');\nconst lat = nmeaToDecimal(f[2], f[3]);\nconst lon = nmeaToDecimal(f[4], f[5]);\nif (lat == null || lon == null)\n{\n    return null;\n}\n\nmsg.payload = { lat, lon };\nreturn msg;",
    "outputs": 1,
    "noerr": 0,
    "initialize": "",
    "finalize": "",
    "libs": [],
    "x": 410,
    "y": 140,
    "wires": [
      [
        "fnToWorldmap"
      ]
    ]
  },
  {
    "id": "fnToWorldmap",
    "type": "function",
    "z": "tab1",
    "name": "Marker + Track",
    "func": "// Input: msg.payload={lat,lon}\n// Output1 → worldmap marker\n// Output2 → worldmap-tracks polyline (then wired into worldmap)\n\nif (!msg.payload || msg.payload.lat == null || msg.payload.lon == null)\n{\n    return null;\n}\n\nconst lat = Number(msg.payload.lat);\nconst lon = Number(msg.payload.lon);\nconst name = \"GPS-1\"; // keep constant per device\nconst now = Date.now();\n\nconst base =\n{\n    name: name,\n    lat: lat,\n    lon: lon,\n    layer: \"GNSS\",\n    time: now, // helps pruning\n    icon: \"fa-location-arrow\",\n    popup: `Lat: ${lat.toFixed(6)}<br>Lon: ${lon.toFixed(6)}<br>UTC: ${new Date(now).toISOString()}`\n};\n\nreturn [ { payload: base }, { payload: base } ];",
    "outputs": 2,
    "noerr": 0,
    "initialize": "",
    "finalize": "",
    "libs": [],
    "x": 650,
    "y": 140,
    "wires": [
      [
        "worldmap",
        "dbgMarker"
      ],
      [
        "tracks"
      ]
    ]
  },
  {
    "id": "tracks",
    "type": "worldmap-tracks",
    "z": "tab1",
    "name": "Track GNSS (layer GNSS)",
    "depth": "1000",
    "layer": "GNSS",
    "doors": "",
    "x": 930,
    "y": 180,
    "wires": [
      [
        "worldmap"
      ]
    ]
  },
  {
    "id": "worldmap",
    "type": "worldmap",
    "z": "tab1",
    "name": "Live Map (/worldmap)",
    "lat": "0",
    "lon": "0",
    "zoom": "2",
    "layer": "OSM",
    "cluster": "",
    "maxage": "",
    "usermenu": "show",
    "layers": "show",
    "panit": "false",
    "panlock": "false",
    "zoomlock": "false",
    "hiderightclick": "false",
    "coords": "none",
    "showgrid": "false",
    "showruler": "false",
    "showlayer": "true",
    "showmenu": "true",
    "path": "/worldmap",
    "overlist": "DR,CO,RA,DN,HM",
    "maplist": "OSM,Esri Terrain,Esri Satellite",
    "mapname": "",
    "mapurl": "",
    "mapopt": "",
    "kmlurl": "",
    "devicelabel": "name",
    "layercontrol": "false",
    "x": 930,
    "y": 120,
    "wires": []
  },
  {
    "id": "dbgMarker",
    "type": "debug",
    "z": "tab1",
    "name": "Marker payload",
    "active": false,
    "tosidebar": true,
    "console": false,
    "tostatus": false,
    "complete": "payload",
    "statusVal": "",
    "statusType": "auto",
    "x": 930,
    "y": 220,
    "wires": []
  },
  {
    "id": "hint",
    "type": "comment",
    "z": "tab1",
    "name": "Send NMEA (\\r\\n delimited) to TCP 2222. Open http://<host>:1880/worldmap",
    "info": "",
    "x": 330,
    "y": 90,
    "wires": []
  }
]