message: only return str, not byte
diff: @@ -58,8 +58,8 @@ def _write_to_device_and_return(cmd, device_connection):
  clean_response = _parse_smoothie_response(response)
  if clean_response:
  - clean_response = clean_response.decode()
  - return clean_response
  + return clean_response.decode()
  + return ''
  def _connect(port_name, baudrate):
  