But it works with Arduino Mega and Duemilanove and probably others. For example this demonstrates the problem. Spiced up Blink example. #include <Wire.h> // the setup function runs once when you press reset or power the board void setup() { // initialize digital pin 13 as an output. pinMode(…

pinMode(SDA, OUTPUT); does not work in DUE

ghlawrence2000 February 10, 2016, 3:01pm 7

I think maybe you should try #if defined(__SAM3X8E__) instead?

Regards,

Graham