Raspberry Pi Control Dashboard

README.md

Requirement: node-red-dashboard. Obviously you will need a Raspberry Pi too!

This is a simple but very useful dashboard to control a Raspberry Pi (similar to Cayenne dashboard for RPi), it includes so far:

• CPU Temperature
• CPU Load %
• Free RAM %
• Disk Usage %
• Actions: Shutdown and Reboot buttons

Feel free to fork and and more stuff ;-) You can get some info and screenshots here

flow.json

[
    {
        "id": "2653a0b0.26d638",
        "type": "ui_gauge",
        "z": "a9ef8731.662048",
        "name": "",
        "group": "1890881e.83819",
        "order": 2,
        "width": 0,
        "height": 0,
        "gtype": "gage",
        "title": "CPU Temperature",
        "label": "C",
        "format": "{{value}}",
        "min": 0,
        "max": "100",
        "colors": [
            "#00b500",
            "#e6e600",
            "#ca3838"
        ],
        "x": 730,
        "y": 140,
        "wires": []
    },
    {
        "id": "fba68adf.14e13",
        "type": "exec",
        "z": "a9ef8731.662048",
        "command": "vcgencmd measure_temp",
        "addpay": false,
        "append": "",
        "useSpawn": "",
        "timer": "",
        "name": "RPi Temp.",
        "x": 370,
        "y": 140,
        "wires": [
            [
                "fa5b499.e176cb8"
            ],
            [],
            []
        ]
    },
    {
        "id": "7c8379de.068868",
        "type": "inject",
        "z": "a9ef8731.662048",
        "name": "",
        "topic": "",
        "payload": "",
        "payloadType": "date",
        "repeat": "10",
        "crontab": "",
        "once": false,
        "x": 164.5,
        "y": 148.25,
        "wires": [
            [
                "fba68adf.14e13",
                "972ece2a.3dbe8",
                "6242be99.26ac88"
            ]
        ]
    },
    {
        "id": "fa5b499.e176cb8",
        "type": "function",
        "z": "a9ef8731.662048",
        "name": "",
        "func": "str = msg.payload\nmsg.payload = str.substring(5,9);\nreturn msg;",
        "outputs": 1,
        "noerr": 0,
        "x": 550,
        "y": 140,
        "wires": [
            [
                "2653a0b0.26d638",
                "28b64a2c.b32116"
            ]
        ]
    },
    {
        "id": "683a2b05.736204",
        "type": "ui_button",
        "z": "a9ef8731.662048",
        "name": "",
        "group": "c5f1b8aa.45bc08",
        "order": 2,
        "width": 0,
        "height": 0,
        "label": "Reboot",
        "color": "",
        "bgcolor": "",
        "icon": "",
        "payload": "",
        "payloadType": "str",
        "topic": "",
        "x": 140,
        "y": 520,
        "wires": [
            [
                "1cf31554.2aaa63"
            ]
        ]
    },
    {
        "id": "1cf31554.2aaa63",
        "type": "exec",
        "z": "a9ef8731.662048",
        "command": "sudo reboot",
        "addpay": false,
        "append": "",
        "useSpawn": "",
        "timer": "",
        "name": "Reboot",
        "x": 358,
        "y": 520,
        "wires": [
            [],
            [],
            []
        ]
    },
    {
        "id": "38e53dbf.ca594a",
        "type": "ui_button",
        "z": "a9ef8731.662048",
        "name": "",
        "group": "c5f1b8aa.45bc08",
        "order": 3,
        "width": 0,
        "height": 0,
        "label": "Shutdown",
        "color": "",
        "bgcolor": "red",
        "icon": "",
        "payload": "",
        "payloadType": "str",
        "topic": "",
        "x": 148.5,
        "y": 564.25,
        "wires": [
            [
                "c409cae5.8e4128"
            ]
        ]
    },
    {
        "id": "c409cae5.8e4128",
        "type": "exec",
        "z": "a9ef8731.662048",
        "command": "sudo shutdown -h now",
        "addpay": false,
        "append": "",
        "useSpawn": "",
        "timer": "",
        "name": "Shutdown",
        "x": 369.5,
        "y": 582.25,
        "wires": [
            [],
            [],
            []
        ]
    },
    {
        "id": "28b64a2c.b32116",
        "type": "ui_chart",
        "z": "a9ef8731.662048",
        "name": "",
        "group": "1890881e.83819",
        "order": 3,
        "width": 0,
        "height": 0,
        "label": "",
        "chartType": "line",
        "legend": "false",
        "xformat": "HH:mm:ss",
        "interpolate": "linear",
        "nodata": "",
        "ymin": "",
        "ymax": "",
        "removeOlder": "24",
        "removeOlderPoints": "",
        "removeOlderUnit": "3600",
        "cutout": 0,
        "x": 730,
        "y": 180,
        "wires": [
            [],
            []
        ]
    },
    {
        "id": "972ece2a.3dbe8",
        "type": "exec",
        "z": "a9ef8731.662048",
        "command": "top -d 0.5 -b -n2 | grep \"Cpu(s)\"|tail -n 1 | awk '{print $2 + $4}'",
        "addpay": false,
        "append": "",
        "useSpawn": "",
        "timer": "",
        "name": "CPU Load",
        "x": 370,
        "y": 220,
        "wires": [
            [
                "b9372186.ed1a5"
            ],
            [],
            []
        ]
    },
    {
        "id": "6242be99.26ac88",
        "type": "exec",
        "z": "a9ef8731.662048",
        "command": "free | grep Mem | awk '{print 100*($4+$6+$7)/$2}'",
        "addpay": false,
        "append": "",
        "useSpawn": "",
        "timer": "",
        "name": "Free Memory",
        "x": 370,
        "y": 300,
        "wires": [
            [
                "9b301b09.8c0468"
            ],
            [],
            []
        ]
    },
    {
        "id": "b9372186.ed1a5",
        "type": "ui_gauge",
        "z": "a9ef8731.662048",
        "name": "",
        "group": "1890881e.83819",
        "order": 1,
        "width": 0,
        "height": 0,
        "gtype": "gage",
        "title": "Processor",
        "label": "CPU",
        "format": "{{value}}",
        "min": 0,
        "max": "100",
        "colors": [
            "#00b500",
            "#e6e600",
            "#ca3838"
        ],
        "x": 730,
        "y": 220,
        "wires": []
    },
    {
        "id": "9b301b09.8c0468",
        "type": "ui_gauge",
        "z": "a9ef8731.662048",
        "name": "",
        "group": "9a96a8b1.92db78",
        "order": 1,
        "width": 0,
        "height": 0,
        "gtype": "gage",
        "title": "Memory",
        "label": "RAM",
        "format": "{{value.toFixed(1)}}",
        "min": 0,
        "max": "100",
        "colors": [
            "#00b500",
            "#e6e600",
            "#ca3838"
        ],
        "x": 730,
        "y": 300,
        "wires": []
    },
    {
        "id": "270f61f0.9af05e",
        "type": "exec",
        "z": "a9ef8731.662048",
        "command": "df -h",
        "addpay": false,
        "append": "",
        "useSpawn": "",
        "timer": "",
        "name": "Disk Usage",
        "x": 370,
        "y": 380,
        "wires": [
            [
                "d70b7556.a0a9e"
            ],
            [],
            []
        ]
    },
    {
        "id": "7ca6ecb.7512014",
        "type": "ui_gauge",
        "z": "a9ef8731.662048",
        "name": "",
        "group": "72fc319.cc425d",
        "order": 1,
        "width": 0,
        "height": 0,
        "gtype": "gage",
        "title": "Disk",
        "label": "Usage",
        "format": "{{value}}",
        "min": 0,
        "max": "100",
        "colors": [
            "#00b500",
            "#e6e600",
            "#ca3838"
        ],
        "x": 730,
        "y": 380,
        "wires": []
    },
    {
        "id": "d70b7556.a0a9e",
        "type": "function",
        "z": "a9ef8731.662048",
        "name": "",
        "func": "var re = /([0-9]{2})%/\nvar idx = msg.payload.search(re);\nvar str = msg.payload;\nif (idx >=0) {\n    str = msg.payload.substring(idx, idx + 2);\n}\nmsg.payload = str;\nreturn msg;",
        "outputs": 1,
        "noerr": 0,
        "x": 550,
        "y": 380,
        "wires": [
            [
                "7ca6ecb.7512014"
            ]
        ]
    },
    {
        "id": "59103f97.07fed",
        "type": "inject",
        "z": "a9ef8731.662048",
        "name": "",
        "topic": "",
        "payload": "",
        "payloadType": "date",
        "repeat": "60",
        "crontab": "",
        "once": false,
        "x": 170,
        "y": 380,
        "wires": [
            [
                "270f61f0.9af05e"
            ]
        ]
    },
    {
        "id": "1890881e.83819",
        "type": "ui_group",
        "z": "",
        "name": "Col1",
        "tab": "c3173234.2636e",
        "order": 1,
        "disp": false,
        "width": "6"
    },
    {
        "id": "c5f1b8aa.45bc08",
        "type": "ui_group",
        "z": "",
        "name": "Actions",
        "tab": "c3173234.2636e",
        "order": 4,
        "disp": true,
        "width": "6"
    },
    {
        "id": "9a96a8b1.92db78",
        "type": "ui_group",
        "z": "",
        "name": "Col2",
        "tab": "c3173234.2636e",
        "order": 2,
        "disp": false,
        "width": "6"
    },
    {
        "id": "72fc319.cc425d",
        "type": "ui_group",
        "z": "",
        "name": "Col3",
        "tab": "c3173234.2636e",
        "order": 3,
        "disp": false,
        "width": "6"
    },
    {
        "id": "c3173234.2636e",
        "type": "ui_tab",
        "z": "",
        "name": "RPi Control",
        "icon": "dashboard",
        "order": 1
    }
]

This is great, what changes are required to accuratly display information on a Raspberry PI 3 that has quad core and 1GB memory ?

Cheers

D

Thank you for this flow, it's great. However, on my Raspberry Pi 3 with 1GB RAM and running the free command, I think there is new column causing the "Memory" graph to be incorrect, I think.

total used free shared buff/cache available Mem: 945520 174840 514604 19052 256076 699772 Swap: 102396 0 102396

The Memory exec is currently running this command:
free | grep Mem | awk '{print 100*($4+$6+$7)/$2}'

The calculation is 100*(USED/TOTAL), where $2 is the "total" column and $4 = free, $6 = buff/cache, and $7 = available. Then the calculation is wrong, it's showing over 150% used.

I think it should be using $3 = used, $5 = shared, and $6 buff/cache.
free | grep Mem | awk '{print 100*($3+$5+$6)/$2}'

shows 47% used in the graph.

Also, see this link describing the latest free cmd changes.
https://andythemoron.com/blog/2017-04-23/Understanding-Linux-Memory-Usage

My "free" command version is 3.3.12

Yes ... this is a great example flow!

I also found one other issue in the Memory Gauge node.

The Value format that is set to {{value.toFixed(1)}} is causing errors. I had to update this to be {{value | number:1}} to have it work correctly without errors.

This is great, what changes are required to accuratly display information on a Raspberry PI 3 that has quad core and 1GB memory ?

Cheers

D

Better late than never?

[
    {
        "id": "a5da1eb0f58fe89a",
        "type": "function",
        "z": "94cf869050128770",
        "name": "Average CPUs",
        "func": "const pl = msg.payload;\n\nconst loads = pl.split(\"\\n\").filter(n => n)\n\nvar total = 0;\nfor (var i = 0; i < loads.length; i++) {\n    total += loads[i];\n}\nvar avg = total / loads.length;\n\n\nmsg.payload = loads;\n\nreturn msg;",
        "outputs": 1,
        "noerr": 0,
        "initialize": "",
        "finalize": "",
        "libs": [],
        "x": 520,
        "y": 680,
        "wires": [
            [
                "b9372186.ed1a5",
                "435126adc3e77f5e"
            ]
        ]
    },
    {
        "id": "972ece2a.3dbe8",
        "type": "exec",
        "z": "94cf869050128770",
        "command": "top -d 0.5 -b -n2 | grep \"Cpu(s)\"| awk '{print $2 + $4}'",
        "addpay": false,
        "append": "",
        "useSpawn": "",
        "timer": "",
        "winHide": false,
        "name": "CPU Load",
        "x": 330,
        "y": 680,
        "wires": [
            [
                "a5da1eb0f58fe89a",
                "1d0556aa4602c25b"
            ],
            [],
            []
        ]
    }
]

This code removes the tail -n 1 call from the exec, and averages CPU load across all CPUs.