does SAMD21 Pro RF support CAN communication and are all pins useable for UART communication?
I don’t believe so…when I search, there are several pages for a samC21 that might? We also sell this https://www.sparkfun.com/products/13262
As for pin functions, here’s a graphical sheet https://cdn.sparkfun.com/assets/e/0/6/6 … pdated.pdf and the official one (our board uses samD21-G) https://cdn.sparkfun.com/assets/6/3/d/d … asheet.pdf