i3dm:
the leonardo has only one pair of serial pins. and i need 2 hardware serials (4 pibs).
where would the second serial connect to?i do not need any USB capability for anything other than firmware flashing.
sounds like the only option for you is to use a MEGA. if size of board is an issue, have a look at the "Mega 2560 PRO MINI" ...
hope that helps.