export type S7DataType = 'bool' | 'byte' | 'int' | 'word' | 'dint' | 'dword' | 'lint' | 'ulint' | 'real' | 'string' | 'wstring';
export interface ReadPoint {
    address: string;
    dataType: S7DataType;
    stringLen?: number;
}
export interface WritePoint extends ReadPoint {
    value: any;
}
export interface ParsedAddr {
    dbNumber: number;
    addrType: 'DBX' | 'DBB' | 'DBW' | 'DBD';
    byteOffset: number;
    bitOffset: number;
}
export declare function parseAddress(address: string): ParsedAddr;
export declare function typeSize(dataType: S7DataType, stringLen?: number): number;
export declare function decode(buf: Buffer, addr: ParsedAddr, dataType: S7DataType): any;
export declare function encode(buf: Buffer, addr: ParsedAddr, dataType: S7DataType, value: any, stringLen?: number): void;
export interface GroupedItem<T> {
    addr: ParsedAddr;
    item: T;
}
export declare function groupByDb<T extends {
    address: string;
}>(items: T[]): Map<number, GroupedItem<T>[]>;
export declare function byteRange<T>(items: GroupedItem<T>[], getSize: (item: T) => number): {
    start: number;
    size: number;
};
export declare function normalize<T extends ReadPoint>(p: T): T;
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