export declare type Device = {
    port: string;
    manufacturer?: string;
    serialNumber?: string;
    pnpId?: string;
    locationId?: string;
    vid?: string;
    pid?: string;
};
export declare type Request = {
    requestId: string;
    cmd: 'listDevices';
} | {
    requestId: string;
    cmd: 'open';
    port: string;
    baudRate: number;
} | {
    requestId: string;
    cmd: 'write';
    port: string;
    data: number[];
} | {
    requestId: string;
    cmd: 'close';
    port: string;
};
export declare type Response = {
    requestId: string;
    cmd: 'success';
} | {
    requestId: string;
    cmd: 'listDevices';
    devices: Device[];
} | {
    requestId?: string;
    cmd: 'error';
    message: string;
} | {
    requestId: never;
    cmd: 'data';
    port: string;
    data: number[];
} | {
    requestId: never;
    cmd: 'closed';
    port: string;
};