def create_response_adu(self, meta_data, response_pdu):
first_part_adu = struct.pack('<STR_LIT>', meta_data['<STR_LIT>']) + response_pdu<EOL>return first_part_adu + get_crc(first_part_adu)<EOL>
Build response ADU from meta data and response PDU and return it.

        :param meta_data: A dict with meta data.
        :param request_pdu: A bytearray containing request PDU.
        :return: A bytearray containing request ADU.