self.host = "00:0D:19:EA:28:52"
    self.port = 3
    self.sock = socket.socket(socket.AF_BLUETOOTH, socket.SOCK_STREAM, socket.BTPROTO_RFCOMM)
    self.sock.connect((self.host, self.port))

File "Client.py", line 21, in __init__
  self.sock.connect((self.host, self.port))
File "/usr/lib/python2.7/socket.py", line 224, in meth
  return getattr(self._sock,name)(*args)
socket.error: [Errno 52] Invalid exchange