Rancang Bangun Alat Penghitung Jumlah Penjualan Air Galon Isi Ulang Dengan Me…

The increasing demand for refillable gallons of drinking water requires efficient solutions for sales management and inventory monitoring. In this context, we propose the design of a counter that uses PZEM and NodeMCU technology to monitor and record the number of gallons of water sold automatically. This tool is designed to increase the efficiency of the sales process, minimize calculation err…