code: def send(self, cmd, **kwargs):
          
          # Pass through the keyword arguments
          self._write(self._build_command(cmd, **kwargs))
docs: send: string param=binary data ... -> None
  
          When send is called with the proper arguments, an API command
          will be written to the serial port for this XBee device
          containing the proper instructions and data.
  
          This method must be called with named arguments in accordance
          with the api_command specification. Arguments matching all
          field names other than those in reserved_names (like 'id' and
          'order') should be given, unless they are of variable length
          (of 'None' in the specification. Those are optional).