import { API, Characteristic, DynamicPlatformPlugin, Logging, PlatformAccessory, PlatformConfig, Service } from 'homebridge';
export declare class NOAAWeatherPlatform implements DynamicPlatformPlugin {
    readonly log: Logging;
    readonly config: PlatformConfig;
    readonly api: API;
    readonly Service: typeof Service;
    readonly Characteristic: typeof Characteristic;
    readonly accessories: Map<string, PlatformAccessory>;
    private readonly userAgent;
    private readonly timers;
    private readonly metrics;
    constructor(log: Logging, config: PlatformConfig, api: API);
    configureAccessory(accessory: PlatformAccessory): void;
    private shutdown;
    /**
     * NWS-recommended User-Agent format: "(myapp.com, contact)".
     * https://www.weather.gov/documentation/services-web-api
     *
     * The optional contact field is sanitized to strip CR/LF, preventing
     * HTTP header injection from a misconfigured config.json value.
     */
    private buildUserAgent;
    private getNumberConfig;
    private getBoolConfig;
    private getStationIdConfig;
    /**
     * Fetch JSON from the NWS API with bounded retries and rate-limit handling.
     * Native fetch + AbortController; no third-party HTTP client required.
     */
    private fetchJson;
    private parseRetryAfter;
    private sleep;
    private writeCacheAtomic;
    private readStationCache;
    private discoverDevices;
    private discoverStation;
    private startPolling;
    private fetchAndPushObservation;
    /** Convert NWS QuantitativeValue to °C, honoring unitCode and QC flag. */
    private extractTemperatureC;
    private extractHumidity;
    private logMetrics;
}