In the industrial era 4.0, every industrial tool or equipment and building already uses automation via IoT, especially in public street lighting. By using a LoRa-based smart PJU system, electrical energy use can be minimized by using dimmer schedule control, ON/OFF schedule control. By using a dimmer schedule for PJU lights, the energy can be set to a maximum of 10 amperes depending on the dimmer module used. Smart PJUs are equipped with a LoRa module so they
can be controlled and monitored via a wireless network. In this research, the LoRa
ebyte E32-DTU(915L20) module was used as the data sender and receiver. LoRa ebyte E32-DTU(915L20) with a frequency of 915 MHz to 931 MHz and an RS232/RS485 connector. The furthest distance that can be reached during testing at the Jakarta Global University campus with a frequency of 922 MHz is 450 meters, 344 meters and 215 meters at three different points. The smart PJU system can regulate light, ON/OFF control, ON/OFF schedule and can see the on or off status of the digital output on the Arduino. To ensure the module is on or off. And can monitor electricity usage in the PJU. such as power, voltage, current, power factor, frequency via the PZEM-016 sensor. The comparison value using the dimmer schedule at 12 hours is 375.62 Wh without the dimmer 1085.04 Wh and the average comparison error value of the PZEM-016 sensor reading with a multimeter is 0.1 current, 0.009 voltage, 0.3 power at each dimmer setting from 20 to 80. All data can be obtained. viewed using Node-red software. By using Node-red software, users can control and monitor easily because Node-red uses language and displays that are easy for users to understand.
Keywords: LoRa-based smart PJU design, LoRa ebyte E32-DTU(915L20), Arduino Nano, PZEM-016, Node-red.