I tried it on my EA device, it doesn't work. I don't really understand why. Maybe it is because of a problem with the wire, that I don't connect properly.
Or maybe it's a problem with the code (or both ^^ ) . But I noticed that the re-paper code, does not use temperature pin to change the display of the screen. And by looking at the data sheet of the 2.7" E paper, I see that to change the display, and input display data, we need to use the temperature sensor.
Maybe the extra pins of the extension board of the re paper code are used to simplify the code and not use the temperature sensor. I don't really know.
I think that the repaper needs to be modified to work on the device. I only tested the code called intro, that is supposed to display some image and some text. Did somebody manage to make this code work without the extension board?