Review on 📺 Waveshare 1.54 Inch E-Paper Display Panel Module - 200x200 Resolution, 3.3v E-Ink Electronic Screen with SPI Interface, Raspberry Pi//Nucleo Compatible, Supporting Partial Refresh by Travis Rogers

The first few 1.54" displays I bought were great. However, the next batch differed from the description and photos for two reasons. : 1. The plug has been changed from 2.54mm (0.1 inch) pitch to 2.0mm pitch connector. (This means that my PCBs, which I designed and made based on first order blocks, will not work.)2. More importantly, they added a voltage regulator and level shifter IC to the blue board so it could interface with 5V systems. But these components change the "deep sleep" current from less than 10 µA to more than 150 µA! It's a disaster when trying to maximize battery life. The beauty of e-paper (electronic ink) displays is that they draw almost no current when the display is static, and they've ruined that with the new version of this module.