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@navas I'm interested as well if you got it to work.
I'm having a GDEW027C44 2.7" 3-color e-ink display. It works fine with an Arduino Uno and the Arduino sample code.
I gutted the code to the bare minimum needed to make it refresh. Then I ported the code (its really only a few lines) to Espruino. No luck, the display doesn't change, it just keeps showing the same image.
I tested all hardware SPIs as well as software SPI. I tested it with a Espruino Wifi and a Pixl. I quadruple checked the wirings. Nothing.
The only thing I can imagine is that the 3.3v power supply isn't enough, though I is rated as an 3.3v display.
Raik
@navas were you ever able to get this working?