Design Of Voltage And Flow Monitoring System For PJU-TS Using The Internet Of Things (IoT)

In a solar street lighting device (PJU-TS), there are factors that affect battery life, namely the charging factor with solar panels and the load on the load. A battery will not function properly if it is depleted for a long time. PJU-TS voltage and current monitoring system is a solution to solve the problem in knowing the condition of battery charging with solar panels, which are rarely even monitored regularly. This system uses Wemos D1 as a microcontroller which is connected to the internet using Wifi. This system aims to display the voltage, current, and graphical monitoring values of a PJU-TS in an application. There are differences in data obtained from sensors and measuring instruments. The difference in voltage is 0.29%, the current is 0.60%. The difference between the measuring instrument and the sensor can be considered small so that the data displayed by the system can still be accepted. The use of Wemos D1 is qualified because the time for sending files containing sensor data is less than 1 second so that the system can work properly.