Aquatron 4S: Sistem Monitoring Kualitas Air Budidaya Ikan Air Tawar Menggunakan Panel Surya 30 WP Berbasis Internet Of Things (IoT) Mansur, Muhamad Asrul Fahri, Muhammad Mufakkir Makesa, Ali Herman, Muhamat Alif Wasa, Dina Aprillia, Muhammad Nadzirin Anshari Nur ELCO Vol. 11 No. 1 2026