Beginner - merge 2 CSV files containing time stamp and temperature to one chart

Hello everybody,

I would like to merge the content of 2 CSV files containing time stamp and temperature value in one chart. I'm trying around for several hours now, nothing works. If I try to join the 2 data, just the second one is displayed.
Maybe anyone can please help me to get it sorted.

Please find attached the two CSV files. I had to rename them to TXT.
maxaussentemp.txt (171 Bytes)
minaussentemp.txt (174 Bytes)

[
    {
        "id": "c27cef39f950c56d",
        "type": "inject",
        "z": "8141eaf8a0322a8e",
        "name": "",
        "props": [
            {
                "p": "payload"
            },
            {
                "p": "topic",
                "vt": "str"
            }
        ],
        "repeat": "",
        "crontab": "",
        "once": false,
        "onceDelay": 0.1,
        "topic": "start",
        "payload": "1",
        "payloadType": "num",
        "x": 150,
        "y": 1600,
        "wires": [
            [
                "21cd0b284985c978",
                "47e51539fdb31b99",
                "d8bf29920d97806d",
                "9be8e52396fb9498"
            ]
        ]
    },
    {
        "id": "d8bf29920d97806d",
        "type": "file in",
        "z": "8141eaf8a0322a8e",
        "name": "min temp",
        "filename": "/run/media/georg/E622951F2294F5B1/Users/Georg Schmitz/Documents/Heinenstr44/NodeRed/csv/minaussentemp.csv",
        "filenameType": "str",
        "format": "utf8",
        "chunk": false,
        "sendError": false,
        "encoding": "none",
        "allProps": false,
        "x": 360,
        "y": 1540,
        "wires": [
            [
                "ac1e46421a5763ca",
                "c90d97410787348b",
                "334a72c4989dfedf",
                "47d255e21723d34d",
                "767446906f91157d"
            ]
        ]
    },
    {
        "id": "9be8e52396fb9498",
        "type": "file in",
        "z": "8141eaf8a0322a8e",
        "name": "max temp",
        "filename": "/run/media/georg/E622951F2294F5B1/Users/Georg Schmitz/Documents/Heinenstr44/NodeRed/csv/maxaussentemp.csv",
        "filenameType": "str",
        "format": "utf8",
        "chunk": false,
        "sendError": false,
        "encoding": "none",
        "allProps": false,
        "x": 360,
        "y": 1660,
        "wires": [
            [
                "89d1779cbcf350f7",
                "3542b1609f4d13b4",
                "685950d73a90dbab",
                "daa7d136cc5d0593",
                "b71909e88b2248c0"
            ]
        ]
    },
    {
        "id": "47d255e21723d34d",
        "type": "csv",
        "z": "8141eaf8a0322a8e",
        "name": "min",
        "sep": ";",
        "hdrin": false,
        "hdrout": "",
        "multi": "mult",
        "ret": "\\n",
        "temp": "x,y",
        "skip": "0",
        "strings": true,
        "include_empty_strings": false,
        "include_null_values": false,
        "x": 590,
        "y": 980,
        "wires": [
            [
                "b4be8d4d6c4b03ac",
                "833972c7aea4839a"
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    },
    {
        "id": "daa7d136cc5d0593",
        "type": "csv",
        "z": "8141eaf8a0322a8e",
        "name": "max",
        "sep": ";",
        "hdrin": false,
        "hdrout": "",
        "multi": "mult",
        "ret": "\\n",
        "temp": "x,y",
        "skip": "0",
        "strings": true,
        "include_empty_strings": false,
        "include_null_values": false,
        "x": 590,
        "y": 1060,
        "wires": [
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                "d5e774b756425363",
                "f7ec47e21b73f86e"
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    },
    {
        "id": "b4be8d4d6c4b03ac",
        "type": "function",
        "z": "8141eaf8a0322a8e",
        "name": "graph generate",
        "func": "\nfunction toTimestamp(strDate){\n     var datum = Date.parse(strDate);\n     return datum/1000;\n    }\nvar payload=msg.payload;\n\n\nvar data_out=[];\nvar a1=[];\n\nfor(let i=0;i<payload.length;i++)\n{\n  \n//var Data= payload[i].Data.split(\"-\");\n//var t=Data[2]+\"/\"+Data[1]+\"/\"+Data[0];\n// timestamp=toTimestamp(t+\" \"+payload[i][\"Godzina\"]);\n\n\nvar temp1={ \"x\":( payload[i][\"x\"]), \"y\":( payload[i][\"y\"]) };\n\n\na1.push(temp1);\n\n \n \n //\n \n \n}\n\ndata_out=[a1];\nmsg.payload=[{\n\"series\": [\"min\"],\n\"data\":data_out,\n\"labels\": [\"01\"]\n}];\n\nmsg.topic = \"min\"\nmsg.parts = \"1\"\nreturn msg;",
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        "noerr": 0,
        "initialize": "",
        "finalize": "",
        "libs": [],
        "x": 780,
        "y": 980,
        "wires": [
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    },
    {
        "id": "8019ec2f1a59377b",
        "type": "function",
        "z": "8141eaf8a0322a8e",
        "name": "",
        "func": "// [{\n//     \"series\": [\"A\", \"B\", \"C\"],\n//     \"data\": [\n//         [{ \"x\": 1504029632890, \"y\": 5 },\n//         { \"x\": 1504029636001, \"y\": 4 },\n//         { \"x\": 1504029638656, \"y\": 2 }\n//         ],\n//         [{ \"x\": 1504029633514, \"y\": 6 },\n//         { \"x\": 1504029636622, \"y\": 7 },\n//         { \"x\": 1504029639539, \"y\": 6 }\n//         ],\n//         [{ \"x\": 1504029634400, \"y\": 7 },\n//         { \"x\": 1504029637959, \"y\": 7 },\n//         { \"x\": 1504029640317, \"y\": 7 }\n//         ]\n//     ],\n//     \"labels\": [\"\"]\n// }]\n\nlet data = []\nmsg.payload = msg.payload.forEach(el => {\n\n    data.push({ \"x\": el[0], \"y\": el[1] })\n\n})\n\nlet chartData = [{\n    series: [\"Wavelength\"],\n    data: [data],\n    labels: [\"\"]\n}]\n\nmsg.payload = chartData;\n\n\nreturn msg;",
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        "initialize": "",
        "finalize": "",
        "libs": [],
        "x": 1280,
        "y": 1320,
        "wires": [
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    {
        "id": "a14ba8c4.e546c8",
        "type": "function",
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        "name": "",
        "func": "//1. lets create a variable to hold the finished article...\nlet chartData = [];  //See #1 - create an empty array\n\n//2. lets create a variable to hold the everything...\nlet element1 = {};  //create element1 as an empty object {}\n\n//3, now add the .property \"series\" to the element1 {object}\nelement1.series = []; // add a .property called series of type [array]\nelement1.series.push(\"Intensity\");\nelement1.series.push(\"Wavelength\");//add 1st array element \"A\"\n\n\n//4. now add the .property \"data\" to the element1 {object}\nelement1.data = [[],[]]; // add a .property called data of type [array]\n\n\n\n/*********** NEXT - ADDING DATA  ***************************\n  NORMALLY, ADDING DATA WOULD BE DYNAMIC \n  PERHAPS LOOPING THROUGH AN ARRAY\n  THIS EXAMPLE SHOWS ADDING HARD CODED VALUES\n************************************************************/\n//4b. now we add 3 arrays to the data [array]\n\n//4c. now add the 3 {objects} inside each of the dataElements\nconst data = msg.payload\nfor(let x = 0; x < data.length; x++){\n  \n    element1.data[0][x] = {x: x, y: data[x][0]}\n    element1.data[1][x] = {x: x, y: data[x][1]}\n}\n\n//5. now add a labels [array] to element1\nelement1.labels = [\"\"]; // add a .property called labels of type [array]\n\n//Lastly, return the chartData as the payload \nmsg.payload = [element1];\nreturn msg;\n",
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        "initialize": "",
        "finalize": "",
        "libs": [],
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        "wires": [
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    {
        "id": "d5e774b756425363",
        "type": "function",
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        "initialize": "",
        "finalize": "",
        "libs": [],
        "x": 780,
        "y": 1060,
        "wires": [
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        "build": "array",
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        "propertyType": "msg",
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        "joiner": "\\n",
        "joinerType": "str",
        "accumulate": false,
        "timeout": "2",
        "count": "",
        "reduceRight": false,
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        "x": 990,
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        "name": "",
        "group": "533e8032.78164",
        "order": 4,
        "width": 0,
        "height": 0,
        "label": "test",
        "chartType": "line",
        "legend": "true",
        "xformat": "MM.DD-HH:mm",
        "interpolate": "linear",
        "nodata": "",
        "dot": true,
        "ymin": "-15",
        "ymax": "40",
        "removeOlder": "2",
        "removeOlderPoints": "",
        "removeOlderUnit": "86400",
        "cutout": 0,
        "useOneColor": false,
        "useUTC": false,
        "colors": [
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            "#ff7f0e",
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            "#98df8a",
            "#d62728",
            "#ff9896",
            "#9467bd",
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        "className": "",
        "x": 1150,
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        "name": "joincsv",
        "active": false,
        "tosidebar": true,
        "console": false,
        "tostatus": false,
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        "targetType": "msg",
        "statusVal": "",
        "statusType": "auto",
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        "rules": [
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                "t": "set",
                "p": "payload",
                "pt": "msg",
                "to": "\t\t  [\t    {\t\t        \"series\": [\"Small Loft\"],\t        \"labels\": [\"H\"],\t        \t       \"data\": [\t                  [\t                    $.payload.\t                      {\t                  \t                        \"x\": $fromMillis(Unix_Time*1000),\t                        \"y\": Value\t                      \t                      }\t                  ]\t                ]\t    }\t  ]\t",
                "tot": "jsonata"
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                "to": "[\t  {\t\t      \"series\": [\"Utility\"],\t      \"labels\": [\"H\"],\t      \t     \"data\": [\t                [\t                  $.payload.\t                    {\t                \t                      \"x\": $fromMillis(Unix_Time*1000),\t                      \"y\": Value\t                    \t                    }\t                ]\t              ]\t  }\t]",
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        "x": 680,
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        "x": 810,
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        "x": 810,
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        "x": 1270,
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        "reduceInitType": "num",
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        "group": "533e8032.78164",
        "order": 4,
        "width": 0,
        "height": 0,
        "label": "",
        "chartType": "line",
        "legend": "true",
        "xformat": "MM.DD-HH:mm",
        "interpolate": "bezier",
        "nodata": "",
        "dot": true,
        "ymin": "",
        "ymax": "",
        "removeOlder": "2",
        "removeOlderPoints": "",
        "removeOlderUnit": "86400",
        "cutout": 0,
        "useOneColor": false,
        "useUTC": false,
        "colors": [
            "#1f77b4",
            "#aec7e8",
            "#ff7f0e",
            "#2ca02c",
            "#98df8a",
            "#d62728",
            "#ff9896",
            "#9467bd",
            "#c5b0d5"
        ],
        "outputs": 1,
        "useDifferentColor": false,
        "className": "",
        "x": 1110,
        "y": 1580,
        "wires": [
            []
        ]
    },
    {
        "id": "aedad6e7594725f2",
        "type": "function",
        "z": "8141eaf8a0322a8e",
        "name": "graph generate",
        "func": "\nfunction toTimestamp(strDate){\n     var datum = Date.parse(strDate);\n     return datum/1000;\n    }\nvar payload=msg.payload;\n\n\nvar data_out=[];\nvar a1=[];\n\nfor(let i=0;i<payload.length;i++)\n{\n  \n//var Data= payload[i].Data.split(\"-\");\n//var t=Data[2]+\"/\"+Data[1]+\"/\"+Data[0];\n// timestamp=toTimestamp(t+\" \"+payload[i][\"Godzina\"]);\n\n\nvar temp1={ \"x\":( payload[i][\"x\"]), \"y\":( payload[i][\"y\"]) };\n\n\na1.push(temp1);\n\n \n \n //\n \n \n}\n\ndata_out=[a1];\nmsg.payload=[{\n\"series\": [\"min\"],\n\"data\":data_out,\n\"labels\": [\"01\"]\n}];\n\nmsg.topic = \"min\"\nmsg.parts = \"1\"\nreturn msg;",
        "outputs": 1,
        "noerr": 0,
        "initialize": "",
        "finalize": "",
        "libs": [],
        "x": 840,
        "y": 1540,
        "wires": [
            [
                "f2d92a0d6c34de54"
            ]
        ]
    },
    {
        "id": "c6dee16b21c54524",
        "type": "function",
        "z": "8141eaf8a0322a8e",
        "name": "graph generate",
        "func": "\nfunction toTimestamp(strDate){\n     var datum = Date.parse(strDate);\n     return datum/1000;\n    }\nvar payload=msg.payload;\n\n\nvar data_out=[];\nvar a1=[];\n\nfor(let i=0;i<payload.length;i++)\n{\n  \n//var Data= payload[i].Data.split(\"-\");\n//var t=Data[2]+\"/\"+Data[1]+\"/\"+Data[0];\n// timestamp=toTimestamp(t+\" \"+payload[i][\"Godzina\"]);\n\n\nvar temp1={ \"x\":( payload[i][\"x\"]), \"y\":( payload[i][\"y\"]) };\n\n\na1.push(temp1);\n\n \n \n //\n \n \n}\n\ndata_out=[a1];\nmsg.payload=[{\n\"series\": [\"max\"],\n\"data\":data_out,\n\"labels\": [\"02\"]\n}];\nmsg.parts = \"2\"\nmsg.topic = \"max\"\nreturn msg;",
        "outputs": 1,
        "noerr": 0,
        "initialize": "",
        "finalize": "",
        "libs": [],
        "x": 840,
        "y": 1660,
        "wires": [
            [
                "f2d92a0d6c34de54"
            ]
        ]
    },
    {
        "id": "533e8032.78164",
        "type": "ui_group",
        "name": "Bla",
        "tab": "f8b4e17b9f2918c9",
        "order": 1,
        "disp": true,
        "width": "11",
        "collapse": false,
        "className": ""
    },
    {
        "id": "f8b4e17b9f2918c9",
        "type": "ui_tab",
        "name": "Home",
        "icon": "dashboard",
        "disabled": false,
        "hidden": false
    }
]

Thank you very much in adanve!
Georg

Here is an example of joining your csv data and fixing your timestamp formats (I suggest you save the timestamp in in correct format).

[{"id":"c27cef39f950c56d","type":"inject","z":"da8a6ef0b3c9a5c8","name":"","props":[{"p":"payload"},{"p":"topic","vt":"str"}],"repeat":"","crontab":"","once":false,"onceDelay":0.1,"topic":"start","payload":"1","payloadType":"num","x":250,"y":4600,"wires":[["8cac63da12b2f6af","6e903208dd8f61fa"]]},{"id":"8cac63da12b2f6af","type":"template","z":"da8a6ef0b3c9a5c8","name":"","field":"payload","fieldType":"msg","format":"handlebars","syntax":"mustache","template":"2023.01.14 23:59:59;10\n2023.01.15 23:59:59;6.64\n2023.01.16 23:59:50;4.56\n2023.01.17 23:59:50;0.32\n2023.01.18 23:59:50;-0.72\n2023.01.19 23:59:50;1.44\n2023.01.20 23:59:50;1.04","output":"str","x":340,"y":4520,"wires":[["767446906f91157d"]]},{"id":"6e903208dd8f61fa","type":"template","z":"da8a6ef0b3c9a5c8","name":"","field":"payload","fieldType":"msg","format":"handlebars","syntax":"mustache","template":"2023.01.14 23:59:59;11.6\n2023.01.15 23:59:59;8\n2023.01.16 23:59:50;6.8\n2023.01.17 23:59:50;5.44\n2023.01.18 23:59:50;4.24\n2023.01.19 23:59:50;3.92\n2023.01.20 23:59:50;3.52","output":"str","x":340,"y":4700,"wires":[["b71909e88b2248c0"]]},{"id":"767446906f91157d","type":"csv","z":"da8a6ef0b3c9a5c8","name":"min","sep":";","hdrin":false,"hdrout":"","multi":"mult","ret":"\\n","temp":"x,y","skip":"0","strings":true,"include_empty_strings":false,"include_null_values":false,"x":470,"y":4520,"wires":[["59b25f538c182c2b"]]},{"id":"b71909e88b2248c0","type":"csv","z":"da8a6ef0b3c9a5c8","name":"max","sep":";","hdrin":false,"hdrout":"","multi":"mult","ret":"\\n","temp":"x,y","skip":"0","strings":true,"include_empty_strings":false,"include_null_values":false,"x":470,"y":4700,"wires":[["abb2a800b22f9fad"]]},{"id":"59b25f538c182c2b","type":"change","z":"da8a6ef0b3c9a5c8","name":"","rules":[{"t":"set","p":"topic","pt":"msg","to":"min","tot":"str"},{"t":"set","p":"payload","pt":"msg","to":"$$.payload ~> |$|{\"x\":$moment($.x).format()}|","tot":"jsonata"}],"action":"","property":"","from":"","to":"","reg":false,"x":620,"y":4520,"wires":[["982108d68186df63"]]},{"id":"abb2a800b22f9fad","type":"change","z":"da8a6ef0b3c9a5c8","name":"","rules":[{"t":"set","p":"topic","pt":"msg","to":"max","tot":"str"},{"t":"set","p":"payload","pt":"msg","to":"$$.payload ~> |$|{\"x\":$moment($.x).format()}|","tot":"jsonata"}],"action":"","property":"","from":"","to":"","reg":false,"x":620,"y":4700,"wires":[["982108d68186df63"]]},{"id":"982108d68186df63","type":"join","z":"da8a6ef0b3c9a5c8","name":"","mode":"custom","build":"object","property":"payload","propertyType":"msg","key":"topic","joiner":"\\n","joinerType":"str","accumulate":true,"timeout":"","count":"2","reduceRight":false,"reduceExp":"","reduceInit":"","reduceInitType":"","reduceFixup":"","x":670,"y":4600,"wires":[["7133d4f6e458641f"]]},{"id":"7133d4f6e458641f","type":"change","z":"da8a6ef0b3c9a5c8","name":"","rules":[{"t":"set","p":"payload","pt":"msg","to":"[\t   {\t       \"series\": [$keys($$.payload)],\t       \"data\":[[$$.payload.min],[$$.payload.max]],\t       \"labels\": [$keys($$.payload)] \t   }\t]","tot":"jsonata"}],"action":"","property":"","from":"","to":"","reg":false,"x":880,"y":4580,"wires":[["0c6d8a8166e50fb7","f2d92a0d6c34de54"]]},{"id":"0c6d8a8166e50fb7","type":"debug","z":"da8a6ef0b3c9a5c8","name":"debug 227","active":true,"tosidebar":true,"console":false,"tostatus":false,"complete":"false","statusVal":"","statusType":"auto","x":890,"y":4680,"wires":[]},{"id":"f2d92a0d6c34de54","type":"ui_chart","z":"da8a6ef0b3c9a5c8","name":"","group":"533e8032.78164","order":4,"width":0,"height":0,"label":"","chartType":"line","legend":"true","xformat":"MM.DD-HH:mm","interpolate":"bezier","nodata":"","dot":true,"ymin":"","ymax":"","removeOlder":"2","removeOlderPoints":"","removeOlderUnit":"86400","cutout":0,"useOneColor":false,"useUTC":false,"colors":["#1f77b4","#aec7e8","#ff7f0e","#2ca02c","#98df8a","#d62728","#ff9896","#9467bd","#c5b0d5"],"outputs":1,"useDifferentColor":false,"className":"","x":1110,"y":4620,"wires":[[]]},{"id":"533e8032.78164","type":"ui_group","name":"Bla","tab":"f8b4e17b9f2918c9","order":1,"disp":true,"width":"11","collapse":false,"className":""},{"id":"f8b4e17b9f2918c9","type":"ui_tab","name":"Home","icon":"dashboard","disabled":false,"hidden":false}]

Hope it helps.

Hello E1cid,

you are wonderful! Thank you for you help. It works fine.
I think I keep the time stamp as it is, as long as it does the job.
I'm not very professional in regard of node red and need to have things just working :wink:

Have a nice weekend!