I have interfaced a 169P with the Maxim 44000 Proximity Sensor and it works fine using the “USI_TWI_Master.h” and “USI_TWI_Master.c” drivers. When I migrate it to the 324PB all heck breaks loose when I build. I guess I have to edit the drivers for the 324PB. Does that make sense? Anyone have that experience. I am new to the 324PB and am testing it out.