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Arafat, Agil Soni, Ari Yuliati, and R. Yovi Manova M. “Design of a Soil Nutrient Measuring Device for NPK (Nitrogen, Phosphorus, Potassium) Case Study of Cayenne Pepper Based on Arduino Nano V3 ATmega328P”. ITEJ (Information Technology Engineering Journals) 8, no. 2 (December 12, 2023): 57 - 62. Accessed March 4, 2026. https://www.syekhnurjati.ac.id/journal/index.php/itej/article/view/120.