Three color EPD support

[FluxGS]

Hello, are you considering updating this library to include support for SSD1675A controller and three color EPD displays?

[martinberlin]

Hi FluxGs,
I started some months ago a component to drive epapers on ESP-IDF 4:
https://github.com/martinberlin/cale-idf

It supports some 3 color displays already (check the Wiki)
Please start an issue In that repository with your model if it’s not there and I will prepare the C++ class for you.