import { MqttOptions } from '../model/mqtt.interface';
export declare class MqttClient {
    client: any;
    connected: boolean;
    constructor();
    connect({ host, port, clientId, username, password, useSSL, onConnectionLost, onMessageArrived, onMessageDelivered, _logMessage }: MqttOptions): Promise<Boolean>;
    publish(topic: string): void;
    disconnect(): void;
}