Was just looking at Arduino sw on github as I finally got some data out of my rgb sensor connected to my Arduino...
I was looking for where SPI and I2C is connected on the pcb and I started reading the readme.md (YES I actually started there!)
I discovered mentioning of Atmega328 several Places...
Cape and at the bottom og page.
Looking at the PCB layout it uses Atmega2560
Think that needs to be changed unless I'm missing something with the sw ???