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Number of Elements: 1
Each electrode is essentially just a conductive pad coated with adhesive gel and terminated on the opposite side with a snap connector
DFrobot guide on how to calibrate and use gravity water PH sensor with Arduino
NFC chip material: PET + etching antenna
( Protect power circuit)
Soil NPK Sensor (Nitrogen-Phosphorus-Potassium) Fertility & Nutrient Measurements esp32 devkit Number of Elements: 1The soil nutrient content can be easily measured using NPK Soil Sensor. Measurement of soil content N (nitrogen), P (phosphorus), and K (potassium) is necessary to determine how much additional nutrient content is to be added to soil to increase crop fertility. The soil fertility is detected using NPK sensors. A major component of soil fertilizer is nitrogen, phosphorus, and potassium. The knowledge of the soil nutrient concentration can help us to
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