2019-01-17 15:09:31 ERROR (MainThread) [homeassistant.config_entries] Error setting up entry Z-Wave (import from configuration.yaml) for zwave
Traceback (most recent call last):
  File "/home/cali/homeassistant/lib/python3.6/site-packages/openzwave/option.py", line 75, in __init__
    raise ZWaveException(u"Can't write to device %s : %s" % (device, traceback.format_exception(*sys.exc_info())))
openzwave.object.ZWaveException: "Zwave Generic Exception : Can't write to device /dev/ttyACM0 : ['NoneType: None\\n']"

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/cali/homeassistant/lib/python3.6/site-packages/homeassistant/config_entries.py", line 252, in async_setup
    result = await component.async_setup_entry(hass, self)
  File "/home/cali/homeassistant/lib/python3.6/site-packages/homeassistant/components/zwave/__init__.py", line 283, in async_setup_entry
    config_path=config.get(CONF_CONFIG_PATH))
  File "/home/cali/homeassistant/lib/python3.6/site-packages/openzwave/option.py", line 81, in __init__
    raise ZWaveException(u"Error when retrieving device %s : %s" % (device, traceback.format_exception(*sys.exc_info())))
openzwave.object.ZWaveException: 'Zwave Generic Exception : Error when retrieving device /dev/ttyACM0 : [\'Traceback (most recent call last):\\n\', \'  File "/home/cali/homeassistant/lib/python3.6/site-packages/openzwave/option.py", line 75, in __init__\\n    raise ZWaveException(u"Can\\\'t write to device %s : %s" % (device, traceback.format_exception(*sys.exc_info())))\\n\', \'openzwave.object.ZWaveException: "Zwave Generic Exception : Can\\\'t write to device /dev/ttyACM0 : [\\\'NoneType: None\\\\\\\\n\\\']"\\n\']'