Couple of questions, I got the RBLink, as an expansion board is the best, but when I connect the USB cable to it, I dont get any printing, if I move the cable to the DUO port, bingo! It prints.
what am I doing wrong , RBLink Gurus? Of course, I make the proper selection in the IDE.
Is there any documentation about this board? GND, ADDR, 3V3 what are those for?
OS Win 10 64 bits
Arduino IDE latest.