Waveshare 4.2inch E-Paper Display Module 400x300 IX2 AIR while INA3221 and INA199 monitor

while INA3221 and INA199 monitor voltage and current for connected outputs

QSFP networking

UART selection switch A: control the SIM868 through USB TO UART

and IPA resources are listed for the GD32H759 family

Waveshare 4.2inch E-Paper Display Module 400x300 IX2 AIR while INA3221 and INA199 monitor4. 2 inch e Paper Module 4. 2inch E Paper Display Module A 400 300 black and white e paper display module with SPI interface, partial refresh support, wide viewing angle, and ultra low power operation for embedded information displays. Key Features 4. 2 inch e paper panel with 400 300 resolution. Black and white display with 4 level grey scale. Supports partial refresh; full refresh takes about 5 seconds. No backlight required; content remains visible