I have a Arduino Due already setup and working with my Nextion LCD display and now i have been trying to add controls to my VFD via the rs485 board . I followed the instructions from this site since it is the same VFD i have. Looking at the code it uses the sofwareserial.h and from what I can gathe…

DUE Problem With Serial Ports And rs485 board

ard_newbie January 12, 2018, 5:30pm 4

The Arduino DUE is 3.3V compliant only. I guess your 5V transceivers might work with logic level shifters.

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