EE04 and Spectra 6 7.3 partial refresh

Acid
Wed, 01 Apr 2026 19:22:50 +0000

I’m aware that the 7.3” Spectra 6 ePaper doesn’t support partial refreshing according to the Seeed description. However the GxEDP2 library supports this for the GoodDisplay “GDEP073E01”, and GoodDisplay themselves advertises it has “advanced partial refresh”.

To me it looks to be the same ePaper, so after some digging around I found this discussion from when the GxEDP2 added the partial refresh support. in the discussion it also links the example code from GoodDisplay.

Both code examples seems to be working with my Seeed EE04/Spectra 6 combo. However the white color starts to fade to blue, more and more with each partial refresh. (It stays white at the top of the display and gradually fades to blue at the bottom).

Since it sort of works, is there any plans of adding the functionality to the Seeed GFX library?

Do anyone have any ideas of how to fix the color fading problem? Or is it just not possible with this combination?

This is how it’s supposed to behave https://www.youtube.com/watch?v=PXS-hDX7hjo

This is the pins i’m using with the GxEDP2 library example if anyone wants to test:

//509 setup
#define EPD_SCK_PIN  D8
#define EPD_MOSI_PIN D10
#define EPD_CS_PIN   D7
#define EPD_DC_PIN   10
#define EPD_RES_PIN  38
#define EPD_BUSY_PIN D3

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