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), [S. l.], v. 8, n. 2, p. 57–62, 2023. DOI: 10.24235/itej.v8i2.120. Disponível em: https://itej.uinssc.ac.id/index.php/itej/article/view/120. Acesso em: 12 mar. 2026.