hi
i imagine that a ic2 lcd screen could be added as there are available the pins for that (analog pin A4,A5 for sda and scl)
in the other hand i dont think that you could connect and sd card reader as most modules need the DI pins 10,11,12,13 ( MOSI, SCK, MISO and CS)
and the pins 10,11 are used all ready for the limit switches
Edited 1 time(s). Last edit at 05/23/2017 11:01AM by caslor.