New e-paper lib produces dim output (Pi Zero W, revised hat, 7.5" display, epd7in5_V2, python)

[LLPP65]

My Pi Zero W and 7.5" display have been working flawlessly after the original hat was replaced with an updated one. Today (6 March 2022) I tried the current MASTER version of the e-paper library and this produces faded output on the display. After reverting to the old version of the library, the display output is correct (dark black).

I have the identical software on a Raspberry 3b with hat and the new library works fine. The display output is dark black and the refresh time is faster than the old library.

[beniaminogreen]

Thanks for leaving this comment - I had the same issue setting up my display. How far back did you have to go to get clear images?

Now all I have to do is fix the display freezing problem...

[LLPP65]

The version of epd7in5_V2 that I have working with the Pi Zero W has these lines in the header:

* | This version: V4.0

* | Date : 2019-06-20

# | Info : python demo

Modifications by Dmitry Brant:

- Oct 2020: New routines for faster SPI data transfer.

[beniaminogreen]

Super, thanks so much!