I understand that they are in HEX, and I understand how to change them etc... Just not exactly what they are doing. And I changed the pin locations, but still doesn't work, I think it has to do with the amount of serial "access"? As it will work with one of the components (LCD screen by itself or the RFID). But when you include the other beginning of the serial (LCD.begin(9600)
it stops working all together.