import type { Duplex } from "node:stream";
/**
 * Options for sending a command to the device.
 */
interface SendCommandOptions {
    /** The command to send, as a Uint8Array or array of numbers. */
    cmd: Uint8Array | number[];
    /** The timeout duration in milliseconds (optional). */
    timeout?: number;
    /** The expected response data (optional). */
    responseData?: Uint8Array;
    /** The expected length of the response (optional). */
    responseLength?: number;
}
/**
 * Sends a command to the device and waits for a response.
 *
 * @param stream - The read/write stream for communication with the device.
 * @param opt - Options for the command, including the command itself and response expectations.
 * @returns A promise that resolves with the response data as a Uint8Array.
 * @throws Will throw an error if sending fails, if the response doesn't match expectations, or if a timeout occurs.
 */
export default function sendCommand(stream: Duplex, opt: SendCommandOptions): Promise<Uint8Array>;
export {};