old init was 0x1f, which sets driver to B/W mode - see also http://pmoc98298.pic37.websiteonline.cn/upload/IL91874V3.pdf 8.2.1
new init is 0x0f, which sets driver to B/W/R mode
also red buffer should not be inverted, as comment already mentioned
setColorBuffer(1, false); // red defaults to not inverted
This fixes my code, which is based on examples/EPDTest/EPDTest.ino
Without above fixes, black was printed as red and red was not printed (left white).
old init was 0x1f, which sets driver to B/W mode - see also http://pmoc98298.pic37.websiteonline.cn/upload/IL91874V3.pdf 8.2.1 new init is 0x0f, which sets driver to B/W/R mode also red buffer should not be inverted, as comment already mentioned setColorBuffer(1, false); // red defaults to not inverted This fixes my code, which is based on examples/EPDTest/EPDTest.ino Without above fixes, black was printed as red and red was not printed (left white).