Using Multiple Serial Monitors
(Read more about Serial Monitors)
If you work with multiple Serial connections, then you can open multiple
Serial Monitor windows, one for each COM port. This can be useful if you work
with an Arduino board that has multiple serial ports, or with multiple boards
attached to your PC.
However, with one Visual Studio/Atmel Studio/Visual Micro
session, you can always use only one board for programming and debugging. If
you want to program/debug multiple boards, simply open multiple Visual
Studio/Atmel Studio sessions.