Yulianti, Dinda, et al. “DESAIN SISTEM MONITORING FLOWMETER KOMUNIKASI RS 232 MENGGUNAKAN SOFTWARE NODE-RED PADA FUEL CELL ELECTRIC VEHICLE: Design of RS 232 Communication Flowmeter Monitoring System Using Node-Red Software for Fuel Cell Electric Vehicle”. Jurnal Konversi Energi Dan Manufaktur, vol. 8, no. 2, July 2023, pp. 115 – 123, doi:10.21009/JKEM.8.2.5.