Thankfully, with Arduino, there are several debugging ... You have to use a MKR Proto Shield (applicable only for MKR boards) ...
The board itself also has some differences from ... No USB-UART (which also means no USB programming), a different pin layout (Arduino shields likely won’t fit) and more I/Os than the ATmegas ...
from the Arduino board itself, to the components, to the handy book of projects and tutorials. That means all you have to do ...