I still don't know why you have to put a 328 to the serLCD to work, they have a PIC controller, so it would be similar to the shield+arduino you are designing, although yours will have more functionalities as you say.
I still don't know why you have to put a 328 to the serLCD to work, they have a PIC controller, so it would be similar to the shield+arduino you are designing, although yours will have more functionalities as you say.