Can someone please tell me or show me the proper protocol and wiring to use for arduino DUE as master and arduino UNO as slave. I already have the logic levelers knowing about the voltage difference. Thanks
There are a few different options you could use. Serial is easy, I2C and SPI would also be fairly easy. Things you need to decide between your options:
- Speed needed
- Distance the signal has to travel (How much wire between the two boards?)
- What pins do you have available? As an example, if you're already using serial for debugging or talking to a computer then you might want to use a different protocol.