You should connect a Batron BT 62005 lcd in this way: LCD PIN -> Description -> LPT PIN 01 -> Vss Ground -> Ground Pin 18-25 02 -> Vdd -> 5V 03 -> V0 Contrast -> Ground 04 -> RS -> 16 05 -> R/W -> 14 06 -> Enable1 -> 1 07 -> Data0 -> 2 08 -> Data1 -> 3 09 -> Data2 -> 4 10 -> Data3 -> 5 11 -> Data4 -> 6 12 -> Data5 -> 7 13 -> Data6 -> 8 14 -> Data7 -> 9 15 -> Enable2 -> 17 16 -> Vee -> NC 17 -> LED+ -> 5V + 100 Ohm Resistor 18 -> LED- -> Ground Pin 18-25