chart.txt

You need to install https://github.com/node-red/node-red-dashboard

Paste code below to node-red:
[
    {
        "id": "b89b8cb9.5e3b5",
        "type": "tab",
        "label": "Flow 1",
        "disabled": false,
        "info": ""
    },
    {
        "id": "a18f3e19.4927",
        "type": "udp in",
        "z": "b89b8cb9.5e3b5",
        "name": "",
        "iface": "",
        "port": "20001",
        "ipv": "udp4",
        "multicast": "false",
        "group": "",
        "datatype": "utf8",
        "x": 160,
        "y": 40,
        "wires": [
            [
                "2beea3a5.b5146c"
            ]
        ]
    },
    {
        "id": "2beea3a5.b5146c",
        "type": "function",
        "z": "b89b8cb9.5e3b5",
        "name": "udp2array",
        "func": "var input = msg.payload;\ninput = input.replace(new RegExp(\"'\", 'g'), \"\\\"\")\n  .replace(new RegExp(\"{\", 'g'), \"[\")\n  .replace(new RegExp(\"}\", 'g'), \"]\");\n\nvar data = JSON.parse(input);\n\nmsg.payload = data;\n\nreturn msg;",
        "outputs": 1,
        "noerr": 0,
        "x": 430,
        "y": 80,
        "wires": [
            [
                "79081a43.376504"
            ]
        ]
    },
    {
        "id": "79081a43.376504",
        "type": "function",
        "z": "b89b8cb9.5e3b5",
        "name": "data_packets",
        "func": "var input = msg.payload;\nvar data = {};\n\nvar ts_last = flow.get(\"TSlast\");\nvar ts_now = input[1] * 1000;\nvar rate = 0;\n\nflow.set(\"TSlast\", ts_now);\nif(ts_last == undefined) {\n    msg.payload = 0;\n    return msg;\n}\n\ndata.ts_range = (ts_now - ts_last);\ndata.ts = ts_now;\ndata.packets = [];\n\nfor(var i=2; i < input.length; i++) {\n    data.packets.push(input[i]);\n}\n\nmsg.payload = data;\n\nreturn msg;",
        "outputs": 1,
        "noerr": 0,
        "x": 670,
        "y": 160,
        "wires": [
            [
                "a0e78917.8b1f08"
            ]
        ]
    },
    {
        "id": "ae1c6d42.a195e",
        "type": "debug",
        "z": "b89b8cb9.5e3b5",
        "name": "",
        "active": true,
        "tosidebar": true,
        "console": false,
        "tostatus": false,
        "complete": "false",
        "x": 1140,
        "y": 100,
        "wires": []
    },
    {
        "id": "5883baee.874414",
        "type": "function",
        "z": "b89b8cb9.5e3b5",
        "name": "plot_values",
        "func": "var input = msg.payload;\n\nvar msgs = [];\n\n\n\nvar min = Math.min(...input.packets);\nvar max = Math.max(...input.packets);\n\nmsgs.push({topic:\"min\",\n    payload: min, \n    timestamp: input.ts\n});\n\nmsgs.push({topic:\"max\",\n    payload: max, \n    timestamp: input.ts\n});\n\n// var step = input.ts_range / input.packets.length;\n// for(var i=0; i < input.packets.length; i++) {\n//     msgs.push({topic: \"a\", \n//         payload: input.packets[i], \n//         timestamp: input.ts + i*step\n//     });\n// }\n\n// msg.payload = msgs;\n// return msg;\n\nreturn [msgs];",
        "outputs": 1,
        "noerr": 0,
        "x": 1050,
        "y": 480,
        "wires": [
            [
                "7a2a45b0.c9a71c"
            ]
        ]
    },
    {
        "id": "a0e78917.8b1f08",
        "type": "delay",
        "z": "b89b8cb9.5e3b5",
        "name": "",
        "pauseType": "rate",
        "timeout": "5",
        "timeoutUnits": "seconds",
        "rate": "1",
        "nbRateUnits": "1",
        "rateUnits": "second",
        "randomFirst": "1",
        "randomLast": "5",
        "randomUnits": "seconds",
        "drop": false,
        "x": 810,
        "y": 260,
        "wires": [
            [
                "5883baee.874414"
            ]
        ]
    },
    {
        "id": "7a2a45b0.c9a71c",
        "type": "ui_chart",
        "z": "b89b8cb9.5e3b5",
        "name": "",
        "group": "8584d008.d0052",
        "order": 0,
        "width": 0,
        "height": 0,
        "label": "chart",
        "chartType": "line",
        "legend": "false",
        "xformat": "HH:mm:ss",
        "interpolate": "linear",
        "nodata": "",
        "dot": false,
        "ymin": "",
        "ymax": "",
        "removeOlder": 1,
        "removeOlderPoints": "",
        "removeOlderUnit": "3600",
        "cutout": 0,
        "useOneColor": false,
        "colors": [
            "#1f77b4",
            "#aec7e8",
            "#ff7f0e",
            "#2ca02c",
            "#98df8a",
            "#d62728",
            "#ff9896",
            "#9467bd",
            "#c5b0d5"
        ],
        "useOldStyle": false,
        "x": 1200,
        "y": 560,
        "wires": [
            [],
            []
        ]
    },
    {
        "id": "8584d008.d0052",
        "type": "ui_group",
        "z": "",
        "name": "test1",
        "tab": "87d97be9.9ebb58",
        "disp": true,
        "width": "6",
        "collapse": false
    },
    {
        "id": "87d97be9.9ebb58",
        "type": "ui_tab",
        "z": "",
        "name": "Home",
        "icon": "dashboard"
    }
]