A solar powered measurement device

Designed for measurement of soil temperature and moisture. It is powered from a li-ion battery charged by the sun. The inner dimensions are 80x80x15 mm. There is a hole on the fron where wires from the solar panel is routed. In the bottom a electrical installations tub with outer diameter 20mm can be fitted. Cables from the electronics can be routed that way. I will add other middle sections with cable routing also.