This design was an experiment using an E-Ink display. Another PCB revision is on the way that should allowing it to be powered from a battery. Right now it can only be powered using a microUSB cable.
The e-ink displays are 2.13" in size and can purchased from either BuyDisplay type or WaveShare. This project is not for sale but I encourage you to make your own. I've provided all the files below.
The programmer board is located at: https://github.com/mike-rankin/ESP32_Programmer
The enclosure designed in Fusion360 is located here: https://www.thingiverse.com/thing:2675865
The code right now does a hardware test verifying the display, sensors and wifi are functional are functional.