A NodeRed flow that reads from the OPS241 and plays a wav file if over the speed threshold

OPS241 NodeRed Flow

[
    {
        "id": "8eb36c95.abf588",
        "type": "exec",
        "z": "bb84ba45.9732b8",
        "command": "/usr/bin/aplay",
        "addpay": false,
        "append": "/home/pi/SlowDown1s.wav",
        "useSpawn": "",
        "timer": "",
        "name": "",
        "x": 167,
        "y": 250.5,
        "wires": [
            [],
            [],
            []
        ]
    },
    {
        "id": "66e106f3.5a02f",
        "type": "switch",
        "z": "bb84ba45.9732b8",
        "name": "test for slow/fast",
        "property": "n",
        "propertyType": "msg",
        "rules": [
            {
                "t": "btwn",
                "v": "-1.1",
                "vt": "num",
                "v2": "1.1",
                "v2t": "num"
            },
            {
                "t": "else"
            }
        ],
        "checkall": "true",
        "outputs": 2,
        "x": 184,
        "y": 177,
        "wires": [
            [],
            [
                "8eb36c95.abf588"
            ]
        ]
    },
    {
        "id": "9562dcbd.8b0808",
        "type": "function",
        "z": "bb84ba45.9732b8",
        "name": "parseFloat into msg.n",
        "func": "\nvar rtn = {n:0.0};\nrtn.n = parseFloat(msg.payload);\n\nreturn rtn;\n",
        "outputs": 1,
        "noerr": 0,
        "x": 177,
        "y": 97,
        "wires": [
            [
                "66e106f3.5a02f"
            ]
        ]
    },
    {
        "id": "78e5daad.343f6c",
        "type": "serial in",
        "z": "bb84ba45.9732b8",
        "name": "OPS241",
        "serial": "9cddaefc.b7137",
        "x": 96,
        "y": 41,
        "wires": [
            [
                "9562dcbd.8b0808"
            ]
        ]
    },
    {
        "id": "9cddaefc.b7137",
        "type": "serial-port",
        "z": "",
        "serialport": "/dev/ttyACM0",
        "serialbaud": "9600",
        "databits": "8",
        "parity": "none",
        "stopbits": "1",
        "newline": "\\n",
        "bin": "false",
        "out": "char",
        "addchar": false
    }
]