Grey levels support on 2 WeAct Studio EPDs

[miklav]

Hello,

I successfully tested 4 grey levels on WeAct Studio 4.2" display (based on SSD1683) using GxEPD2_4G library. I used the settings for GDEY042T81 panel (it uses the same controller and has the same size and resolution as WeAct).

Also, the 1.54" display from the same WeAct Studio (SSD1681) is capable of showing 4 grey levels, I used settings for GDEY0154D67.

Perhaps it's worth to be mentioned in the README of GxEPD2_4G ?

And one more suggestion - it's not obvious that GxEPD2_4G library exists, and it doesn't show up in Arduino Library Manager. I would suggest to mention it in the README of the main GxEPD2 library.

[julien123123]

hey, I was coming here to talk about the same display! I also have a 4.2 epd from weact, but mine is a GY-E042A87. I'm having a hard time making it show any shade of gray. I was trying manually. I'll definately give the 4g library a try! The IC is an ssd1683, but it looks like the otp is mapped differently. I can't do the fast refresh either. Which version of the panel did you get? For me the 1.54 also works perfectly.

[miklav]

My 4.2 panel is on the photos. I am not sure about the model, seems it's HE042A87.

[julien123123]

It looks like we have different revisions. The writings on my ribbons are on the interior and there's no "-A3" at the end


I'm really not used to c and, my example does not compile. Looks like it's going to take a to se if my version works with grays.

[julien123123]

ok, I've been able to compile my example, I can attest that the library works with my revision too!

[miklav]

I can attest that the library works with my revision too!

félicitations :)

[miklav]

Just to add that I managed to use anti aliased font with this display, and with a minor addition to this library (https://github.com/miklav/GxEPD2_4G_ext)