Development Arduino Data Logger using INA219 Sensor for Battery Capacity Monitoring

A battery, also known as an accumulator, is electrical cell that can reverse electrochemical process with high efficiency. It essential in the use of systems storage devices. has two critical parameters: current and voltage. These parameters affect battery's behavior, which leads to battery usage. As a result, monitoring instrument required monitor voltage while it use. The researchers designed Arduino Pro Mini 5V microcontroller main processor, INA219 sensor, RTC DS3231 time reader, micro SD card module data logger, OLED SH1106 display current, voltage, readings. calibration sensor reading accuracy 91.43% 99.87%. RMSE was measured at 227.65 mA 0.0146 V. device tested BSB DB 12-55Ah connected 30W PJU lamps. In results this test, we experienced drop ripple performance. usage capacity 49.71 Ah. Based on research, built conditions.