yes, ii = i2c. ii was supposed to mean “i2c with a smart protocol” but we never got around to implementing this smart protocol… so it’s a pretty dumb protocol, basically tons of defines in libavr32.
the physical connector is a huge ordeal. i spent a ludicrous amount of time on this problem over the course of a year and gave up-- it’s a very difficult problem that i won’t go into here.
i’d just leave a header exposed. i2c on this would be a very homemade hacked thing. yes there’s a 3.5mm port on the aleph but i wouldn’t consider that a standard, nor the ridiculous 2x3 headers on the modules.
edit: @zebra is fully correct re TWI. “ii” is more fun to say though