OSW Light V4 (wip)
The idea is based on the OSW light v3.3, but designed from scratch. There are more sensors and size improvements.
... and the overall thickness has decreased by placing the esp32 directly on the PCB instead of using a module. Moving from 0603 to 0402 left enough space for all components.
Optionally, you can solder a microSD card slot ot the back of the PCB (adding back to the original thickness)