Rancang Bangun Alat Penghitung Jumlah Penjualan Air Galon Isi Ulang Menggunak…

Refillable gallon water is an essential need for modern society, given the convenience and practicality it offers. However, managing the sales of refillable gallon water often faces challenges such as lack of employee supervision and difficulties in profit calculation. This study aims to design and develop a Refillable Gallon Water Sales Monitoring System using the ZMPT AC sensor based on NodeM…