一、构造函数的入参：

    1. config

    tb_gateway.yaml关于thingsboard配置：

    1. thingsboard:
    2.     host: 127.0.0.1
    3.     port: 1883
    4.     remoteShell: true
    5.     remoteConfiguration: false
    6.     statsSendPeriodInSeconds: 3600
    7.     minPackSendDelayMS: 0
    8.     checkConnectorsConfigurationInSeconds: 60
    9.     handleDeviceRenaming: true
    10.     checkingDeviceActivity:
    11.         checkDeviceInactivity: false
    12.         inactivityTimeoutSeconds: 120
    13.         inactivityCheckPeriodSeconds: 10
    14.         security:
    15.             accessToken: o55jUl0quC1QX2XRPhl5
    16.   qos: 1
    1. config_folder_path

    配置文件目录：
    D:\xx\code\python\thingsboard-gateway\thingsboard_gateway\config\
    二、构造函数主要工作

    1. 从构造函数传递过来的配置初始化成员变量，核心成员变量是：

      1. self.client = TBGatewayMqttClient(self.__host, self.__port, self.__token, self, quality_of_service=self.__default_quality_of_service)

    2. 启动线程

      1. self.start()

      线程run函数：

      1. def run(self):
      2.  keep_alive = self.__config.get("keep_alive", 120)
      3.  try:
      4.      while not self.client.is_connected() and not self.__stopped:
      5.          if not self.__paused:
      6.              if self.__stopped:
      7.                  break
      8.              log.info("connecting to ThingsBoard")
      9.              try:
      10.                  self.client.connect(keepalive=keep_alive,
      11.                                      min_reconnect_delay=self.__min_reconnect_delay)
      12.              except ConnectionRefusedError:
      13.                  pass
      14.              except Exception as e:
      15.                  log.exception(e)
      16.          sleep(1)
      17.  except Exception as e:
      18.      log.exception(e)
      19.      sleep(10)
      20.  while not self.__stopped:
      21.      try:
      22.          if not self.__stopped:
      23.              sleep(.2)
      24.          else:
      25.              break
      26.      except KeyboardInterrupt:
      27.          log.info('KeyboardInterrupt')
      28.          self.__stopped = True
      29.      except Exception as e:
      30.          log.exception(e)

      tip:
      只是启动线程，还没有去连接thingsborad，只有gatewayservice调用connect函数才去连接thingsboard