import type { MqttClient, OnMessageCallback } from 'mqtt';
export default class ServerMQTT {
    username: string;
    password: string;
    clean: boolean;
    connectTimeout: number;
    url: string;
    topic: string;
    pubTopic: string;
    client: MqttClient;
    constructor(url: string, username: string, password: string, topic: string, pubTopic: string);
    init(receiveMessage: OnMessageCallback): void;
    send(data: any): void;
    close(): void;
}