RS232 to TTL Serial Interface Module with the MAX3232 transceiver IC that facilitates serial communication between TTL and RS232 ports by providing the necessary electrical signal conversion.
The MAX3232 IC with 16 pin requires 3.0 V to 5.5 V to operate and has two receivers and two transmitters...
This E-Ink display module, 4.3inch, 800×600 resolution, with serial interface and embedded font libraries, is very much user friendly compared to the available counterparts.
You don't have to know anything about the complex underlying details of e-Paper, nor the specific algorithms of display..