This is a simple case made out of two parts which should fit together, so that no screws or glue is required. The wemos sits in the bottom and the BME 280 sensor is held via the slot in the top cover. I´m securing the wemos boards with an additional drop of hot glue in each corner, so nothing can move around. Please note that this case is not secure and meant to used outdoor. For a more waterproof case please see my other designs. You can print these parts without infill, just perimeters. In prusaSlicer i´m selecting 3 perimeters and get good quality prints which finish in around 30 / 20 minutes.