docs: def dm_encode(keypad_area, clear, beep, timeout, line1, line2):
      """dm: Display message on keypad."""
      return MessageEncode(
          '2Edm{:1d}{:1d}{:1d}{:05d}{:^<16.16}{:^<16.16}00'
          .format(keypad_area+1, clear, beep, timeout, line1, line2), None
      )