Storage of nodered data on Revpi

General
1

I want to locally save the data I receive from a sensor on my Revpi.

[
    {
        "id": "3773427109966ee3",
        "type": "debug",
        "z": "4baeccbbe8b96cc7",
        "name": "debug 3",
        "active": true,
        "tosidebar": true,
        "console": false,
        "tostatus": false,
        "complete": "false",
        "statusVal": "",
        "statusType": "auto",
        "x": 580,
        "y": 180,
        "wires": []
    },
    {
        "id": "d832e5323784bb49",
        "type": "group",
        "z": "4baeccbbe8b96cc7",
        "name": "",
        "style": {
            "stroke": "#ffff00",
            "label": true
        },
        "nodes": [
            "fb0560e6fbaf9f57",
            "a59ecdd3cf7436d4",
            "c9bac3d96d3bd19e",
            "13e820eb178b5714"
        ],
        "x": 44,
        "y": 39,
        "w": 1092,
        "h": 82
    },
    {
        "id": "fb0560e6fbaf9f57",
        "type": "inject",
        "z": "4baeccbbe8b96cc7",
        "g": "d832e5323784bb49",
        "name": "",
        "props": [
            {
                "p": "payload"
            },
            {
                "p": "topic",
                "vt": "str"
            }
        ],
        "repeat": "30",
        "crontab": "",
        "once": false,
        "onceDelay": "1",
        "topic": "",
        "payload": "",
        "payloadType": "date",
        "x": 160,
        "y": 80,
        "wires": [
            [
                "a59ecdd3cf7436d4"
            ]
        ]
    },
    {
        "id": "a59ecdd3cf7436d4",
        "type": "function",
        "z": "4baeccbbe8b96cc7",
        "g": "d832e5323784bb49",
        "name": "Abfrage der Werte",
        "func": "\n// 🌡 Werte abrufen\n\nlet temperatur_innen = global.get(\"Temp_Innen\") || 0;\n\n\n\n// 🕒 Zeitstempel generieren\nlet timestamp = new Date().toISOString();\n\n// 📄 CSV-Zeile erstellen\nmsg.payload = `${timestamp},${temperatur_innen}\\n`;\nreturn msg;\n",
        "outputs": 1,
        "timeout": 0,
        "noerr": 0,
        "initialize": "",
        "finalize": "",
        "libs": [],
        "x": 400,
        "y": 80,
        "wires": [
            [
                "c9bac3d96d3bd19e",
                "3773427109966ee3"
            ]
        ]
    },
    {
        "id": "c9bac3d96d3bd19e",
        "type": "file",
        "z": "4baeccbbe8b96cc7",
        "g": "d832e5323784bb49",
        "name": "",
        "filename": "/home/pi/temperatur_innen.csv",
        "filenameType": "str",
        "appendNewline": true,
        "createDir": false,
        "overwriteFile": "false",
        "encoding": "utf8",
        "x": 740,
        "y": 80,
        "wires": [
            [
                "13e820eb178b5714"
            ]
        ]
    },
    {
        "id": "13e820eb178b5714",
        "type": "debug",
        "z": "4baeccbbe8b96cc7",
        "g": "d832e5323784bb49",
        "name": "debug 17",
        "active": true,
        "tosidebar": true,
        "console": false,
        "tostatus": false,
        "complete": "payload",
        "targetType": "msg",
        "statusVal": "",
        "statusType": "auto",
        "x": 1030,
        "y": 80,
        "wires": []
    }
]

I get this:

Fehler beim Anhängen an Datei: Error: EACCES: permission denied, open '/home/pi/temperatur_innen.csv'

How can i fix that ?

Thanks in advance!

2

How did you install node red?

Can you show us the node red startup log?