def connection(self):
"""
Lazy initialization of the connection object
"""
if self._connection:
return self._connection
elif self.address:
adapter = pygatt.backends.GATTToolBackend()
adapter.start(False)
self._connection = adapter.connect(self.address, address_type='random')
self.sense = MorseSense(self._connection, self.sensor_state)
self.sense.start()
return self._connection
else:
return None
