Hi folks,
Thought I'd share a pic of a nice Newhaven Display OLED which works nicely with the OpenXenium for me.
I just used the Arduino Pro Micro but not on the spi2par2019 board, since it's oled (no backlight etc), plus it's no use anyway since oled has a 20 pin varied connector that doesn't match obviously. You need to be careful setting the pins up.
It's using the same hd44780 parallel 6800 4-bit interface (not i2c) - I just set the oled using jumpers soldered on the back as per pdf. I added the initialisation code into the .ino and changed some of the hd44780 commands up as well. You also have to edit the liquidcrystal library too - bit of a faff, I'm no coder but managed in the end after a week.
You can get it on Mouser etc, different colours. Ugh it's £22.80 plus the vat though
Rough first youtube vid on ipad - turn up volume.