One would use a USB to serial cable or adapter on a USB cable. That would be the slower one by far.
With boards a handwidth or so apart I have run software serial at 57600 baud without losing chars. The distance matters.
One would use a USB to serial cable or adapter on a USB cable. That would be the slower one by far.
With boards a handwidth or so apart I have run software serial at 57600 baud without losing chars. The distance matters.