E-ink and IoT any suggestions?

Hey guys. I am playing RTL8722 (WiFi and BT IoT microcontroller) with the SPI E-ink screen now.
I am wondering if there is any cool project that I can make. Any suggestions?
And is it possible that I customized the SPI lib for myself?
I am writing continuous blogs for this project. Please refer if you are interesting.
https://forum.amebaiot.com/members/michaelz/