Simple clip case for the Raspberry Pi Zero plus RaspBee II hat (https://phoscon.de/de/raspbee2). The combination is particularly well suited for installation of a zigbee2mqtt bridge, which again can be used to connect ZigBee enabled devices with the Home Assistant home automation software.

Geeetech A20

No

No

0.2 mm layer height, 0.3 mm initial layer

80% gyroid with 2 gradual infill steps

PETG probably more suitable as material, but does not print well with my bowden extruder type 3D printer.

The 3D model is based on a parametric design in FreeCAD. Some of the parameters may require tweaking based on the accuracy/calibration of your 3D printer to enable tight clipping of the top part.