old_contents: #!/usr/bin/env python
  ###################################################################################
  #
  # Copyright (c)     2010-2016   Motsai
  #
  # The MIT License (MIT)
  #
  # Permission is hereby granted, free of charge, to any person obtaining a copy
  # of this software and associated documentation files (the "Software"), to deal
  # in the Software without restriction, including without limitation the rights
  # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  # copies of the Software, and to permit persons to whom the Software is
  # furnished to do so, subject to the following conditions:
  #
  # The above copyright notice and this permission notice shall be included in all
  # copies or substantial portions of the Software.
  #
  # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  # SOFTWARE.
  #
  ###################################################################################
  
  import asyncio
  
  from neblina import *
  from neblinaUART import NeblinaUART
  
  bleSupported = True
  try:
      from neblinaBLE import NeblinaBLE
  except ImportError:
      print("Unable to import BLE. BLE is unsupported and can not be used.")
      bleSupported = False
  
  ###################################################################################
  
  
  class NeblinaDevice(object):
  
      def __init__(self, address, interface):
          self.address = address
  
          if interface is Interface.UART:
              self.communication = NeblinaUART(self.address)
          else:
              assert bleSupported
              self.communication = NeblinaBLE(self.address)
  
      def connect(self):
          self.communication.connect()
  
      def disconnect(self):
          self.communication.disconnect()
  
      def isConnected(self):
          return self.communication.isConnected()
  
      def receivePacket(self):
          if self.isConnected():
              return self.communication.receivePacket()
          else:
              return None
  
      def sendPacket(self, packet):
          self.communication.sendPacket(packet)
  
  
new_contents: #!/usr/bin/env python
  ###################################################################################
  #
  # Copyright (c)     2010-2016   Motsai
  #
  # The MIT License (MIT)
  #
  # Permission is hereby granted, free of charge, to any person obtaining a copy
  # of this software and associated documentation files (the "Software"), to deal
  # in the Software without restriction, including without limitation the rights
  # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  # copies of the Software, and to permit persons to whom the Software is
  # furnished to do so, subject to the following conditions:
  #
  # The above copyright notice and this permission notice shall be included in all
  # copies or substantial portions of the Software.
  #
  # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  # SOFTWARE.
  #
  ###################################################################################
  
  import asyncio
  
  from neblina import *
  from neblinaUART import NeblinaUART
  
  bleSupported = True
  try:
      from neblinaBLE import NeblinaBLE
  except ImportError:
      print("Unable to import BLE. BLE is unsupported and can not be used.")
      bleSupported = False
  
  ###################################################################################
  
  
  class NeblinaDevice(object):
  
      def __init__(self, address, interface):
          self.address = address
  
          if interface is Interface.UART:
              self.communication = NeblinaUART(self.address)
          else:
              assert bleSupported
              self.communication = NeblinaBLE(self.address)
  
      def connect(self):
          self.communication.connect()
  
      def disconnect(self):
          self.communication.disconnect()
  
      def isConnected(self):
          return self.communication.isConnected()
  
      def receivePacket(self):
          if self.isConnected():
              return self.communication.receivePacket()
          else:
              return None
  
      def sendPacket(self, packet):
          if self.isConnected():
              self.communication.sendPacket(packet)
  
  
subject: Check for device connection before sending packet.