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  • MUSE Automator & Extension for VS Code

Muse Automator: send strings to TCP device example

Written by Gary Brindley

Updated at January 12th, 2026

Table of Contents

Questions: Answer:

Questions:

How do you send strings to a device using a TCP connection in Muse Automator?

Answer:

The follow example will show how to send string to an IP Device using both Change Nodes and Function Nodes which connect to a TCP Request Node. 

The TCP Server in this example is mainly to provide some feedback for the example strings that are sent but it does show the basic setup of the TCP IN and TCP REPLY Nodes as well. 

Import the snippet below into Muse Automator to see the example.

[
    {
        "id": "c83664d50953a4ab",
        "type": "tab",
        "label": "Send Strings to IP Devices",
        "disabled": false,
        "info": "",
        "env": []
    },
    {
        "id": "ee1c19d0938067f8",
        "type": "group",
        "z": "c83664d50953a4ab",
        "name": "TCP Server to get responses from example strings",
        "style": {
            "label": true
        },
        "nodes": [
            "29c698b7d1f250af",
            "b337c2dab3887e5c",
            "6fdbf4a4bf36e923",
            "bd4ff2b880a0f1c8",
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            "5faa309f653ce0ec",
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            "3ebe96b2f42147c9",
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            "8014b99fbe2ab92d"
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        "y": 659,
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        "h": 182
    },
    {
        "id": "00e93950fb3ab863",
        "type": "group",
        "z": "c83664d50953a4ab",
        "name": "Example of sending strings over a TCP connecting using the TCP Request Node",
        "style": {
            "label": true
        },
        "nodes": [
            "6f8b782623bab3ae",
            "59f00fd2d46bfb5c",
            "e8f2098a83fd528e",
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        "type": "group",
        "z": "c83664d50953a4ab",
        "g": "00e93950fb3ab863",
        "name": "Using Change Node to build strings",
        "style": {
            "label": true
        },
        "nodes": [
            "b112f9e455d6367b",
            "19bba7669ead84f0",
            "84466faea4687be5",
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        "type": "group",
        "z": "c83664d50953a4ab",
        "g": "00e93950fb3ab863",
        "name": "Using Function Node to build strings",
        "style": {
            "label": true
        },
        "nodes": [
            "63d02b8f6f4e8208",
            "b6e80b68b6849ac9",
            "d7a988a81ce42830",
            "96f83f55ef8cd596",
            "66253b33a24e0866",
            "41f0f68b2b723304"
        ],
        "x": 54,
        "y": 279,
        "w": 372,
        "h": 162
    },
    {
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        "type": "group",
        "z": "c83664d50953a4ab",
        "g": "00e93950fb3ab863",
        "name": "Keep Alive",
        "style": {
            "label": true
        },
        "nodes": [
            "885d4d2a9de046da",
            "44ad884a969cc37a"
        ],
        "x": 54,
        "y": 479,
        "w": 372,
        "h": 82
    },
    {
        "id": "29c698b7d1f250af",
        "type": "tcp in",
        "z": "c83664d50953a4ab",
        "g": "ee1c19d0938067f8",
        "name": "TCP SERVER",
        "server": "server",
        "host": "",
        "port": "1234",
        "datamode": "stream",
        "datatype": "buffer",
        "newline": "",
        "topic": "",
        "trim": false,
        "base64": false,
        "tls": "",
        "x": 120,
        "y": 760,
        "wires": [
            [
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        ]
    },
    {
        "id": "b337c2dab3887e5c",
        "type": "function",
        "z": "c83664d50953a4ab",
        "g": "ee1c19d0938067f8",
        "name": "toLowerCase",
        "func": "msg.payload = msg.payload.toLowerCase()\nreturn msg;",
        "outputs": 1,
        "noerr": 0,
        "initialize": "",
        "finalize": "",
        "libs": [],
        "x": 490,
        "y": 760,
        "wires": [
            [
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    {
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        "type": "template",
        "z": "c83664d50953a4ab",
        "g": "ee1c19d0938067f8",
        "name": "Reply with TCP received",
        "field": "payload",
        "fieldType": "msg",
        "format": "handlebars",
        "syntax": "mustache",
        "template": "TCP Server just received the following message: {{payload}}\n",
        "output": "str",
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        "y": 800,
        "wires": [
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        "z": "c83664d50953a4ab",
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        "name": "TCP Reply",
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        "port": "",
        "beserver": "reply",
        "base64": false,
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        "wires": []
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            },
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                "v": "how about",
                "vt": "str"
            },
            {
                "t": "else"
            }
        ],
        "checkall": "true",
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        "outputs": 3,
        "x": 650,
        "y": 760,
        "wires": [
            [
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            ],
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        "field": "payload",
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        "format": "handlebars",
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        "template": "Shall we play a game?\n",
        "output": "str",
        "x": 910,
        "y": 720,
        "wires": [
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                "8014b99fbe2ab92d"
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    },
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        "type": "template",
        "z": "c83664d50953a4ab",
        "g": "ee1c19d0938067f8",
        "name": "Reply with WOULDN'T YOU PREFER",
        "field": "payload",
        "fieldType": "msg",
        "format": "handlebars",
        "syntax": "mustache",
        "template": "WOULDN'T YOU PREFER A NICE GAME OF CHESS?\n",
        "output": "str",
        "x": 930,
        "y": 760,
        "wires": [
            [
                "8014b99fbe2ab92d"
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        ]
    },
    {
        "id": "b112f9e455d6367b",
        "type": "inject",
        "z": "c83664d50953a4ab",
        "g": "69beadef8123bee8",
        "name": "",
        "props": [
            {
                "p": "payload"
            },
            {
                "p": "topic",
                "vt": "str"
            }
        ],
        "repeat": "",
        "crontab": "",
        "once": false,
        "onceDelay": 0.1,
        "topic": "",
        "payload": "",
        "payloadType": "date",
        "x": 160,
        "y": 120,
        "wires": [
            [
                "19bba7669ead84f0"
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    },
    {
        "id": "19bba7669ead84f0",
        "type": "change",
        "z": "c83664d50953a4ab",
        "g": "69beadef8123bee8",
        "name": "Hello",
        "rules": [
            {
                "t": "set",
                "p": "payload",
                "pt": "msg",
                "to": "Hello",
                "tot": "str"
            }
        ],
        "action": "",
        "property": "",
        "from": "",
        "to": "",
        "reg": false,
        "x": 310,
        "y": 120,
        "wires": [
            [
                "6f8b782623bab3ae"
            ]
        ]
    },
    {
        "id": "6f8b782623bab3ae",
        "type": "tcp request",
        "z": "c83664d50953a4ab",
        "g": "00e93950fb3ab863",
        "name": "TCP Request to localhost:1234",
        "server": "localhost",
        "port": "1234",
        "out": "sit",
        "ret": "buffer",
        "splitc": " ",
        "newline": "",
        "trim": false,
        "tls": "",
        "x": 640,
        "y": 240,
        "wires": [
            [
                "e8f2098a83fd528e"
            ]
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    },
    {
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        "type": "debug",
        "z": "c83664d50953a4ab",
        "g": "00e93950fb3ab863",
        "name": "Shall We Debug",
        "active": true,
        "tosidebar": true,
        "console": false,
        "tostatus": false,
        "complete": "payload",
        "targetType": "msg",
        "statusVal": "",
        "statusType": "auto",
        "x": 1300,
        "y": 200,
        "wires": []
    },
    {
        "id": "3ebe96b2f42147c9",
        "type": "debug",
        "z": "c83664d50953a4ab",
        "g": "ee1c19d0938067f8",
        "name": "TCP Server Received",
        "active": true,
        "tosidebar": true,
        "console": false,
        "tostatus": false,
        "complete": "payload",
        "targetType": "msg",
        "statusVal": "",
        "statusType": "auto",
        "x": 510,
        "y": 700,
        "wires": []
    },
    {
        "id": "fb1250a5ec7dbffd",
        "type": "function",
        "z": "c83664d50953a4ab",
        "g": "ee1c19d0938067f8",
        "name": "bufferToString",
        "func": "msg.payload = msg.payload.toString();\nreturn msg;",
        "outputs": 1,
        "noerr": 0,
        "initialize": "",
        "finalize": "",
        "libs": [],
        "x": 310,
        "y": 760,
        "wires": [
            [
                "b337c2dab3887e5c",
                "3ebe96b2f42147c9"
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    },
    {
        "id": "e8f2098a83fd528e",
        "type": "function",
        "z": "c83664d50953a4ab",
        "g": "00e93950fb3ab863",
        "name": "bufferToString",
        "func": "msg.payload = msg.payload.toString();\nreturn msg;",
        "outputs": 1,
        "noerr": 0,
        "initialize": "",
        "finalize": "",
        "libs": [],
        "x": 870,
        "y": 240,
        "wires": [
            [
                "1e4b88bdb162d98e"
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    },
    {
        "id": "8014b99fbe2ab92d",
        "type": "function",
        "z": "c83664d50953a4ab",
        "g": "ee1c19d0938067f8",
        "name": "Add CR",
        "func": "msg.payload = Buffer.from(msg.payload+\"\\r\");\nreturn msg;",
        "outputs": 1,
        "noerr": 0,
        "initialize": "",
        "finalize": "",
        "libs": [],
        "x": 1190,
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        "wires": [
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    },
    {
        "id": "f2818c80a2b92cab",
        "type": "inject",
        "z": "c83664d50953a4ab",
        "g": "69beadef8123bee8",
        "name": "",
        "props": [
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        "crontab": "",
        "once": false,
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        "topic": "",
        "payload": "",
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    {
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        "rules": [
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                "to": "How about Global Thermonuclear War?",
                "tot": "str"
            }
        ],
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            },
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                "vt": "str"
            }
        ],
        "repeat": "",
        "crontab": "",
        "once": false,
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        "topic": "",
        "payload": "",
        "payloadType": "date",
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        "type": "change",
        "z": "c83664d50953a4ab",
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        "name": "Any Other",
        "rules": [
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                "p": "payload",
                "pt": "msg",
                "to": "Any Other Message",
                "tot": "str"
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        "outputs": 1,
        "noerr": 0,
        "initialize": "",
        "finalize": "",
        "libs": [],
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        "noerr": 0,
        "initialize": "",
        "finalize": "",
        "libs": [],
        "x": 340,
        "y": 360,
        "wires": [
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                "6f8b782623bab3ae"
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        "libs": [],
        "x": 340,
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        "wires": [
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        "topic": "",
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    {
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        "topic": "",
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        "g": "00e93950fb3ab863",
        "name": "",
        "property": "payload",
        "propertyType": "msg",
        "rules": [
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                "v": "Shall we play a game?",
                "vt": "str"
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            {
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                "v": "WOULDN'T YOU PREFER A NICE GAME OF CHESS?",
                "vt": "str"
            },
            {
                "t": "cont",
                "v": "TCP Server just received the following message:",
                "vt": "str"
            }
        ],
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        "y": 240,
        "wires": [
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        "active": true,
        "tosidebar": true,
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        "targetType": "msg",
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        "wires": []
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    {
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        "type": "debug",
        "z": "c83664d50953a4ab",
        "g": "00e93950fb3ab863",
        "name": "Everything Else Debug",
        "active": true,
        "tosidebar": true,
        "console": false,
        "tostatus": false,
        "complete": "payload",
        "targetType": "msg",
        "statusVal": "",
        "statusType": "auto",
        "x": 1320,
        "y": 280,
        "wires": []
    },
    {
        "id": "885d4d2a9de046da",
        "type": "inject",
        "z": "c83664d50953a4ab",
        "g": "a34f2d53e104564d",
        "name": "Keep Alive",
        "props": [
            {
                "p": "payload"
            },
            {
                "p": "topic",
                "vt": "str"
            }
        ],
        "repeat": "30",
        "crontab": "",
        "once": true,
        "onceDelay": 0.1,
        "topic": "",
        "payload": "",
        "payloadType": "date",
        "x": 170,
        "y": 520,
        "wires": [
            [
                "44ad884a969cc37a"
            ]
        ]
    },
    {
        "id": "44ad884a969cc37a",
        "type": "change",
        "z": "c83664d50953a4ab",
        "g": "a34f2d53e104564d",
        "name": "Keep Alive",
        "rules": [
            {
                "t": "set",
                "p": "payload",
                "pt": "msg",
                "to": "Keep Alive",
                "tot": "str"
            }
        ],
        "action": "",
        "property": "",
        "from": "",
        "to": "",
        "reg": false,
        "x": 340,
        "y": 520,
        "wires": [
            [
                "6f8b782623bab3ae"
            ]
        ]
    }
]

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