I wanna do a live monitoring of energy usage. my problem is that my chart is completely empty at the dashboard. Thats my code.
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"filename": "C:\\Users\\Labor\\Desktop\\messwert.csv",
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"func": "let rawData = msg.payload; // JSON-Daten\n\n// Sicherstellen, dass rawData ein Array ist\nlet dataArray = Array.isArray(rawData) ? rawData : [rawData];\n\n// Initialisiere das Dataset für den Chart\nlet dataset = {\n labels: [],\n series: [[]] // Leistung\n};\n\n// Letzte 50 Werte übernehmen\nlet lastEntries = dataArray.slice(-20);\n\nlastEntries.forEach(entry => {\n if (typeof entry === \"object\" && entry.timestamp && entry.leistung !== undefined) {\n dataset.labels.push(entry.timestamp); // ✅ Korrekt: Zeitstempel extrahieren\n dataset.series[0].push(parseFloat(entry.leistung)); // ✅ Leistung\n } else {\n node.warn(\"⚠️ Ungültige Daten: \" + JSON.stringify(entry));\n }\n});\n\nmsg.payload = dataset;\nreturn msg;\n",
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"name": "csv zu JSON",
"spec": "rfc",
"sep": ",",
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"hdrout": "none",
"multi": "mult",
"ret": "\\r\\n",
"temp": "timestamp,leistung,luftfeuchte,temperatur",
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"statusType": "auto",
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"type": "ui_chart",
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"height": 0,
"label": "chart",
"chartType": "line",
"legend": "true",
"xformat": "auto",
"interpolate": "linear",
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"dot": false,
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"removeOlderUnit": "3600",
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This is the last debug message before the data is transferred to the chart:
{"labels":["2025-03-16T11:39:48.375Z","2025-03-16T12:39:48.395Z","2025-03-16T13:39:48.406Z","2025-03-16T14:39:48.417Z","2025-03-16T15:39:48.436Z","2025-03-16T16:39:48.451Z","2025-03-16T17:39:48.470Z","2025-03-16T18:39:48.478Z","2025-03-16T19:39:48.496Z","2025-03-16T20:39:48.513Z","2025-03-16T21:39:48.532Z","2025-03-16T22:39:48.552Z","2025-03-16T23:39:48.558Z","2025-03-17T00:39:48.572Z","2025-03-17T01:39:48.580Z","2025-03-17T02:39:48.593Z","2025-03-17T03:39:48.600Z","2025-03-17T04:39:48.613Z","2025-03-17T05:39:48.622Z","2025-03-17T06:39:48.716Z"],"series":[[324,321.8,326.8,332.2,324.7,325.1,330.4,322.4,322,66.9,65.8,66.9,67.7,65.3,68.4,66.6,64.8,65.3,68,66.4]]}
