/**
 * @fileOverview An activator that activates a GPIO pin on a Raspberry Pi
 */
export declare class GPIOActivator {
    private pin;
    private time;
    /**
     * @constructor
     *
     * @param pin: {number} The pin to output when activated
     * @param time: {number} The time (in ms) to activate the pin
     */
    constructor(pin: number, time: number);
    init(): Promise<any>;
    /**
     * Returns a Promise that, when resolved, activates the pin for the
     * set period of time.
     *
     * @returns {Promise<any>}
     */
    activate(): Promise<any>;
}