Modbus TCP runtime ip

General
1

Hey everybody,
I'm using node-red-contrib-modbus and made successfully a modbus tcp connection, even read and write mode.

I trying to find out a way to set dynamically, I mean in runtime as I do with a function node right before a flex-getter node, the client ip address, in my case is 10.0.0.10:502.
IP is different on every installation and I don't want to hard code it every time.
I'd prefer to do it via a dashboard

I tried to use flex-server or flex-connector but really cannot understand how to set flow or nodes to get my goal.

Any help would be welcome, or any basic example of flow which I could look into

Thanks
M

2

found this that could be related...

4

It seems clienttype TCP cannot override a clienttype SERIAL:
If I try to set as TCP a modbus-client preconfigured as "serial client", this operation seem s to have no effect, and erros in debug are all about the serial client not the tcp one

I use this flow for testing

[
    {
        "id": "602c2fb9189b3c62",
        "type": "modbus-flex-getter",
        "z": "5b0dada6.2ecd9c",
        "name": "",
        "showStatusActivities": true,
        "showErrors": true,
        "logIOActivities": false,
        "server": "ebeab3422d31a778",
        "useIOFile": false,
        "ioFile": "",
        "useIOForPayload": false,
        "emptyMsgOnFail": false,
        "keepMsgProperties": false,
        "x": 630,
        "y": 640,
        "wires": [
            [
                "167f353c05c28461"
            ],
            []
        ]
    },
    {
        "id": "9eb2b47107b96ed8",
        "type": "inject",
        "z": "5b0dada6.2ecd9c",
        "name": "",
        "props": [
            {
                "p": "payload"
            },
            {
                "p": "topic",
                "vt": "str"
            }
        ],
        "repeat": "",
        "crontab": "",
        "once": false,
        "onceDelay": 0.1,
        "topic": "",
        "payload": "",
        "payloadType": "date",
        "x": 315,
        "y": 640,
        "wires": [
            [
                "2996681554f2e749"
            ]
        ],
        "l": false
    },
    {
        "id": "2996681554f2e749",
        "type": "function",
        "z": "5b0dada6.2ecd9c",
        "name": "FC 3 120.10 ",
        "func": "msg.payload = {\n    fc: 3,\n    address: 120,\n    quantity: 10,\n}\n\n\nreturn msg;",
        "outputs": 1,
        "noerr": 0,
        "initialize": "",
        "finalize": "",
        "libs": [],
        "x": 430,
        "y": 640,
        "wires": [
            [
                "602c2fb9189b3c62"
            ]
        ]
    },
    {
        "id": "167f353c05c28461",
        "type": "debug",
        "z": "5b0dada6.2ecd9c",
        "name": "",
        "active": true,
        "tosidebar": true,
        "console": false,
        "tostatus": false,
        "complete": "payload",
        "targetType": "msg",
        "statusVal": "",
        "statusType": "auto",
        "x": 775,
        "y": 640,
        "wires": [],
        "l": false
    },
    {
        "id": "5e8844296c95858c",
        "type": "modbus-flex-connector",
        "z": "5b0dada6.2ecd9c",
        "name": "",
        "maxReconnectsPerMinute": 4,
        "emptyQueue": false,
        "showStatusActivities": false,
        "showErrors": false,
        "server": "ebeab3422d31a778",
        "x": 730,
        "y": 580,
        "wires": [
            []
        ]
    },
    {
        "id": "b8f8914c9d5d69ae",
        "type": "function",
        "z": "5b0dada6.2ecd9c",
        "name": "TCP | 10.0.2.56:502 | 1",
        "func": "msg.payload = {\n    'connectorType': 'TCP',\n    'tcpHost': '10.0.2.56',\n    'tcpPort': '502',\n    'unitId': 1\n}\nreturn msg;",
        "outputs": 1,
        "noerr": 0,
        "initialize": "",
        "finalize": "",
        "libs": [],
        "x": 470,
        "y": 580,
        "wires": [
            [
                "5e8844296c95858c"
            ]
        ]
    },
    {
        "id": "9ab09aca.ae3f08",
        "type": "inject",
        "z": "5b0dada6.2ecd9c",
        "name": "",
        "props": [
            {
                "p": "payload"
            },
            {
                "p": "topic",
                "vt": "str"
            }
        ],
        "repeat": "",
        "crontab": "",
        "once": false,
        "onceDelay": 0.1,
        "topic": "",
        "payload": "",
        "payloadType": "date",
        "x": 315,
        "y": 580,
        "wires": [
            [
                "b8f8914c9d5d69ae"
            ]
        ],
        "l": false
    },
    {
        "id": "ebeab3422d31a778",
        "type": "modbus-client",
        "name": "",
        "clienttype": "serial",
        "bufferCommands": true,
        "stateLogEnabled": false,
        "queueLogEnabled": false,
        "tcpHost": "0.0.0.0",
        "tcpPort": "0",
        "tcpType": "DEFAULT",
        "serialPort": "/dev/ttyUSB",
        "serialType": "RTU-BUFFERD",
        "serialBaudrate": "9600",
        "serialDatabits": "8",
        "serialStopbits": "1",
        "serialParity": "none",
        "serialConnectionDelay": "100",
        "unit_id": "0",
        "commandDelay": "1",
        "clientTimeout": "1000",
        "reconnectOnTimeout": false,
        "reconnectTimeout": "2000",
        "parallelUnitIdsAllowed": true
    }
]