The: A tool to detect the ripeness of Berastagi and Wokan oranges based on acidity levels using an AS7263 sensor and an ESP32 microcontroller. elementer [Internet]. 31 Mei 2026 [dikutip 10 Juli 2026];12(1):1-12. Tersedia pada: https://jurnal.pcr.ac.id/index.php/elementer/article/view/6731