A box for the HINK-E075A07-A0 7.5inch 800x480 e-Paper display (Red, Black, White). Can be bought here: https://www.aliexpress.com/item/1005006573527365.html?spm=a2g0o.productlist.main.35.649dEJwKEJwK76&algo_pvid=bb7415da-86ae-4007-a763-9b36a6f140bb&pdp_ext_f=%7B%22order%22%3A%2270%22%2C%22eval%22%3A%221%22%2C%22fromPage%22%3A%22search%22%7D&utparam-url=scene%3Asearch%7Cquery_from%3A%7Cx_object_id%3A1005006573527365%7C_p_origin_prod%3A

In my example here, I'm using a LOLIN ESP32 to display weather data from yr.no (top graph) and bottom graph displays temperature values from a Zigbee sensor I have outside (sends data to HomeAssistant).

The ESP32 wakes up every hour to update the display. I made a hole on the left side of the box to make it possible to recharge the batteries (3 x 18650) via USB as the LOLIN board have a battery manager build in.

I used a little bit of optical fiber (2mm diameter) which I glued on top of the LED's on the ESP32 - this fiber is then bent to fit in a small hole in the main box (there's two of them). In this way I am able to see when the battery charging is done. Works nicely :-)

Fiber found here: 5mX Black PMMA end glow plastic optical fiber cable. https://www.aliexpress.com/item/32816491332.html?spm=a2g0o.order_list.order_list_main.4.a0611802gGOt93

Everything is hot-glued inside the box.

I've included the Fusion360 file - so modify it - if you want to ;-)

Lots of support to print the main box.