Due & Uno communications

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:

  1. Speed needed
  2. Distance the signal has to travel (How much wire between the two boards?)
  3. 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.