Given a UV sensor integrated into a greenhouse roof, what specific UV parameters (e.g., UV Index or irradiance in W/m²) can be reliably measured and used to set Arduino-controlled thresholds to protect plants from harmful UV exposure?
Do you want to protect the plants that are in the greenhouse?
To do this, you need to know what material is used for the transparent coating. For example, ordinary glass almost completely cuts off UV-B and UV-C. The UV index is a difficult to calculate value, it cannot be simply related to the irradiance (measured in W/m2) because the UV of greatest concern occupies a spectrum of wavelengths from 295 to 325 nm, and shorter wavelengths have already been absorbed a great deal when they arrive at the earth's surface.
The value of the UV Index is difficult to calculate, and cannot be simply linked to irradiance (measured in W/m2) because the UV rays of greatest interest occupy a spectrum of wavelengths from 295 to 325 nm, and the shorter wavelengths have already been absorbed significantly by the time they reach the The earth's surface.
Plants can be sensitive to UV-B radiation, which can cause stress or inhibit growth. A higher UV index and UV-B irradiance levels indicate increased UV-B exposure, affecting plant health. UV index values above 6 can lead to stress in sensitive plants, while values above 8 can have pronounced effects on plant growth. UV-B irradiance as low as 0.1 W/m² can cause stress, and higher levels can lead to significant growth inhibition in many plants.
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