ControlMqtt 添加了用户名和密码，否则连接有密码的MQTT会报错！

[dragonlhp]

添加了
`# -*- coding: utf-8
#author: chenzhuo
#Raspberry Pi or other platform can connect to the mqtt client,publisher and subscriber can access to bidirectional communication by switching their identities.
#Example:you can get temperature of the enviroment collected by Arduino using Raspberry Pi when Raspberry Pi and Arduino communicate with each other.
#The actions' file must be /home/pi/.wukong/action.json

#Fix: Hcreak 2019.10
#Fix: imliubo 2020.04 NodeMCU code reference: https://wukong.hahack.com/#/contrib?id=controlmqtt

import paho.mqtt.client as mqtt
import paho.mqtt.publish as publish
import time
import json
import os
from robot import config, logging
from robot.sdk.AbstractPlugin import AbstractPlugin

logger = logging.getLogger(name)

class Plugin(AbstractPlugin):

SLUG = "mqttPub"

def search_word(self, text):
    home_dir = os.path.expandvars('$HOME')
    location = home_dir + '/.wukong/action.json'
    if os.path.exists(location):
        f = open(location).read()

        try:
            fjson = json.loads(f)

            for key in fjson.keys():
                value = fjson[key]

                if isinstance(value,list):   # 向上兼容
                    for word in value:
                        if word in text:
                            return key,word

                if isinstance(value,dict):
                    for word in value.keys():
                        if word in text:
                            return key,value[word]

        except Exception as e:
            logger.error(e)
            self.say("抱歉出了问题", cache=True)
            return

    else:    
        return


def handle(self, text, parsed):

    profile = config.get()

    #get config
    if ( self.SLUG not in profile ) or ( 'host' not in profile[self.SLUG] ) or ( 'topic_s' not in profile[self.SLUG] ) or ( 'username' not in profile[self.SLUG] ) or ( 'password' not in profile[self.SLUG] ):
        self.say("主人，配置有误", cache=True)
        return

    host = profile[self.SLUG]['host']
    port = 1883
    if ( 'port' in profile[self.SLUG] ):
        port = int(profile[self.SLUG]['port'])
    topic_s = profile[self.SLUG]['topic_s']
    username = profile[self.SLUG]['username']
    password = profile[self.SLUG]['password']
    # text = text.split("，")[0]   #百度语音识别返回的数据中有个中文，
    topic_p,payload = self.search_word(text)

    try:
        self.say("已经接收到指令", cache=True)
        mqtt_contro(host,port,username,password,topic_s,topic_p,payload,self.con)
    except Exception as e:
        logger.error(e)
        self.say("抱歉出了问题", cache=True)
        return

def isValid(self, text, parsed):
    if self.search_word(text) == None:
        return False
    else:
        return True

class mqtt_contro(object):

def __init__(self,host,port,username,password,topic_s,topic_p,message,mic):
    self._logger = logging.getLogger(__name__)
    self.host = host
    self.port = port
    self.username = username
    self.password = password
    self.topic_s = topic_s
    self.topic_p = topic_p
    self.message = message
    self.mic = mic
    self.mqttc = mqtt.Client()
    self.mqttc.on_message = self.on_message
    self.mqttc.on_connect = self.on_connect
    #mqttc.on_publish = on_publish
    #mqttc.on_subscribe = on_subscribe
    #mqttc.on_log = on_log
    if self.host and self.topic_p:
        message = json.dumps({"msg":self.message})
        publish.single(self.topic_p, payload=message, hostname=self.host,port=self.port)
        if self.port and self.topic_s and self.host:
            self.mqttc.username_pw_set(username=self.username,password=self.password)
            self.mqttc.connect(self.host, self.port, 5)
            self.mqttc.subscribe(topic_s, 0)
        #while True:
        #    self.mqttc.loop(timeout=5)
        self.mqttc.loop_start()

def on_connect(self,mqttc, obj, flags, rc):
    if rc == 0:
        pass
    else:
        self._logger.critical("error connect")

def on_message(self,mqttc, obj, msg):
    if msg.payload:
        self.mqttc.loop_stop()
        self.mqttc.disconnect()
        self.mic.say(str(msg.payload.decode("utf-8")))
    else:
        time.sleep(5)
        self.mqttc.loop_stop()
        self.mqttc.disconnect()
        self.mic.say("连接超时", cache=True)

def on_publish(self,mqttc, obj, mid):
    self._logger.debug("mid: " + str(mid))

def on_subscribe(self,mqttc, obj, mid, granted_qos):
    self._logger.debug("Subscribed: " + str(mid) + " " + str(granted_qos))

def on_log(self,mqttc, obj, level, string):
    self._logger.debug(string)

`

[wzpan]

你好，这个改动可以发个PR吗?