Hi,
Looking at things again, I had got mixed up as to where the I2C was on each board. I can now see that I’ve got so solder a header on the Mega and get some kind of I2C bus to connect the two.
I’m still confused about the SD card size litits and formatting though. And I still have the problem of not being able to upload to the stalker. I’m worried that it’s faulty.
Thanks again,
Iain