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https://www.prusaprinters.org/social/229741-wizeus/about

UPDATED VERSION AVAILABLE: https://www.thingiverse.com/thing:4710702

This is a case designed for 4.2" E-Paper or E-Ink Displays. It can be used as a Weather Station for example.
It operates from rechargeable batteries and is thus completely wireless. A WiFi-Connection is needed for the Weather Station program. In my experience the two 500mAh batteries (combined 1Ah 3.3V) last for three months provided that they don't get drained when there's no WiFi or Internet and the ESP32 is constantly attempting to get data.
in order to protect your cells from over-discharge I'd advise to use a BMS.

Electronics:

• 4.2" E-Paper Display made by Waveshare
• ESP32 (Preferably on a minimalistic breakout board for the lowest possible power consumption and due to space constraints) I like to use this board: https://www.aliexpress.com/item/2017-High-Quality-ESP-32F-Bluetooth-and-WIFI-Dual-Core-CPU-IoT-Wifi-Wlan-BLE-Module/32834183871.html Please note that all my previous boards had the same issue: Pin 21 (SDA was not connected on the PCB), this particular pin isn't used in this project.
• 1x or 2x 14500 LiFePo4 batteries (mine have about 500mAh each)
• LiFePO 4 BMS / Protection: https://www.ebay.com/itm/1S-12A-3-2V-PCB-BMS-Protection-Board-F-26650-18650-LiFe-LiFePO4-Battery-Cell-PCM/322654560816
• Wires, connectors etc.
• Decoupling capacitors (needed when WiFi is active)

Software:
G6EJD's awesome weather station code is used by me: https://github.com/G6EJD/ESP32-e-Paper-Weather-Display
Here's the code that I'm running on my Weather Station: https://github.com/wilhelmzeuschner/misc/tree/master/old_E-Paper_Weather_Station_Code

If you build this project and want to give me something back in return, I'd be extremely happy to see a post under "Makes"! :)