What are the mandatory sensors to make RIMpro work?

Air Temperature : Average air temperature in °Celsius, measured with a shielded sensor at 1.5 to 2.0 meter height. Preferably in the crop canopy.

Air Humidity : In %, measured with a shielded sensor at 1.5 to 2.0 meter height. Preferably in the crop canopy.

Rain : Accumulated rainfall in mm. Resolution 0.2 mm or lower.

Leaf Wetness (one or two sensor) : Number of minutes of leaf wetness. Observed with a leaf wetness sensor in a shaded part of the crop canopy.

You can also add as an option, a sensor of soil surface temperature. In °Celsius, measured with a shielded sensor at 0.05 to 0.10 meter height.