Buffer swap and endianness

Extract from raw Modbus Buffer response

Use the second output msg.payload.buffer object to convert the responding buffer.

Example flow

Tested with the JS Buffer to extract and swap the buffer as you need your data.

[
    {
        "id": "18ea8042.ed0f2",
        "type": "modbus-read",
        "z": "325a2317.7214fc",
        "name": "Automatic Read FC3",
        "showStatusActivities": false,
        "unitid": "",
        "dataType": "HoldingRegister",
        "adr": "200",
        "quantity": "10",
        "rate": "1",
        "rateUnit": "s",
        "server": "",
        "x": 250,
        "y": 200,
        "wires": [
            [
                "4842691f.156838"
            ],
            [
                "78c57d11.312d94",
                "7c3a39bf.40b348",
                "33239b9c.7605b4",
                "4d64be9f.20935"
            ]
        ]
    },
    {
        "id": "78c57d11.312d94",
        "type": "debug",
        "z": "325a2317.7214fc",
        "name": "",
        "active": false,
        "console": "false",
        "complete": "true",
        "x": 450,
        "y": 240,
        "wires": []
    },
    {
        "id": "7c3a39bf.40b348",
        "type": "function",
        "z": "325a2317.7214fc",
        "name": "extract buffer",
        "func": "return [{ payload: msg.payload.buffer.readInt16LE(0,2)},\n{ payload: msg.payload.buffer.readInt16BE(0,2) }];",
        "outputs": "2",
        "noerr": 0,
        "x": 470,
        "y": 280,
        "wires": [
            [
                "656af465.503b3c"
            ],
            [
                "656af465.503b3c"
            ]
        ]
    },
    {
        "id": "33239b9c.7605b4",
        "type": "modbus-response",
        "z": "325a2317.7214fc",
        "name": "",
        "registerShowMax": 20,
        "x": 490,
        "y": 160,
        "wires": []
    },
    {
        "id": "4842691f.156838",
        "type": "debug",
        "z": "325a2317.7214fc",
        "name": "",
        "active": false,
        "console": "false",
        "complete": "false",
        "x": 470,
        "y": 120,
        "wires": []
    },
    {
        "id": "656af465.503b3c",
        "type": "debug",
        "z": "325a2317.7214fc",
        "name": "",
        "active": false,
        "console": "false",
        "complete": "false",
        "x": 650,
        "y": 280,
        "wires": []
    },
    {
        "id": "4d64be9f.20935",
        "type": "function",
        "z": "325a2317.7214fc",
        "name": "swap buffer",
        "func": "msg.payload.buffer.swap16()\nreturn { payload: msg.payload.buffer };",
        "outputs": "1",
        "noerr": 0,
        "x": 470,
        "y": 320,
        "wires": [
            [
                "6ed544fa.dcce3c"
            ]
        ]
    },
    {
        "id": "6ed544fa.dcce3c",
        "type": "debug",
        "z": "325a2317.7214fc",
        "name": "",
        "active": false,
        "console": "false",
        "complete": "false",
        "x": 650,
        "y": 320,
        "wires": []
    }
]