CONFIG_SCHEMA={
"type": "object",
    "properties": {
        "xi": {"type": "number"},
        "xf": {"type": "number"},
        "fi": {"type": "number"},
        "ff": {"type": "number"},
        "nfre": {"type": "number"},
        "ptx": {"type": "string"},
        "ifbw": {"type": "number"}
    }
}
