You can easily measure soil acidity, soil temperature, soil salinity, soil moisture, and illuminance.
12 levels of soil acidity: pH 3.5-9.0 (minimum display pH 0.5, accuracy ± pH 0.5)
Soil temperature: 5-40 ° C (minimum display 1 ° C, accuracy ± 1 ° C)
Soil salinity (2 levels): DANGER, NOR
Soil moisture: 5 stages, illuminance: 9 stages