Got a #M5Stack #PaperS3 display a couple of days ago, took me too long to figure out how to make it work. M5 use to have really good documentation, but the last few devices I've bought, I've noticed they aren't documented well.
Finally I figured out, all you need to do is add the epdiy library and M5GFX library takes care of the rest - since I haven't really used epdiy before I don't know if this is normal.
So I was thinking about using this to display the daily #XKCD image. But also Batman