I have setup my Feather RP2040 ThinkInk to connect to the GDEY0579T93 using the GxEPD2 library. I referenced this helpful post and got it sort of working. Here is what it looks like when I run the demo code I stole from here.
As you can see it only writes to the top-right quadrant (the border also works). I've actually tried to use the official arduino example code from GoodDisplay and some circuitpython code and they have the same issue.
This is what running the official arduino example code looks like (note the bottom right will sometimes change colors).
I would've thought the display was broken but I RMA'd the first one I got for the same reason and so I think maybe I'm doing this wrong (or else this Aliexpress vendor is sending out bad units).
Anyone have experience with something like this?
Hi @derenrich2
These displays have a standard 24 pin FPC connector. But they don't work with the usual 24 pin connection modules for SPI e-paper panel displays, because they have 2 controllers and use pins that are unused on other panels. Look for DESPI-C579.
5.79 inch E-Paper HAT adapter board, DESPI-C579
Then both controllers will listen on SPI.
Thanks for the reply! Yeah I had understood that these displays use two controller chips and were a little different but I had thought that the two chips cascaded and so could be controlled through the normal SPI interface.
This person was able to get this display to work on a CrowPranel board and looking at the schematic for 24 pin on that board compared to the thinkink they seem the same but could be I'm missing something.
That said I'll investigate the adapter you suggested. Thanks!
