Box to support USB-UART on the ESP-01 Helper that I bought from ebay.
I have no relations to the ebay seller but like his little ESP-01 helper.
I made this "lower box" to make my unit last longer, its a very simple design so I used
hot glue to mount the uart board and cyanoacrylate glue "crazy glue" to mount the esp-01 helper to the edge of the box.

Other fun stuff at my personal website: stockholmviews.com

stl file and f3d is straight from Fusion 360.
I printed mine in .2mm layer height and .4mm whidt and used PLA at 220c no support no brim or skirt and the big flat side agains the bed.