Rancang Bangun Sistem Kendali Penerangan Jalan Umum Berbasis Sensor Cahaya Dan Gerak Untuk Efisiensi Energi Menggunakan Arduino Uno Dan Internet Of Things (Iot)

Public Street Lighting (PJU) plays a crucial role inensuring road user safety; however, conventional systems that operate continuously often cause significant electrical energywaste. This research designs and develops a PJU control system based on a Light Dependent Resistor (LDR) andPassiveInfrared (PIR) motion sensor, controlled by Arduino Uno andintegrated with the Internet of Things (IoT) for remote monitoring. The system detects ambient light intensity to determine day or night conditions and identifies vehicle or pedestrian movement to adjust lamp operation accordingly. Testing results show that the battery voltage at 18:00 was 12.6 V with a current of 0.83 A (lamp at fullbrightness),decreasing to 11.4 V with a current of 0.95 A at the end of the test. Battery endurance reached 15.2 hours without the PIR sensor, 28.3 hours with PIR and no activity, and 19.5 hours with
activity detected. The LDR input voltage measured 0V(bright) and 3.3 V (dark), while the PIR produced 3.3 V when motion was detected and 0 V when idle. The system adjusted lamp intensity from dim (0.180.19 A) to bright (0.88 A) according to sensor readings. IoT integration via the ESP8266 module and Blynk application enabled real-time monitoring of sensor and lamp status. The implementation of thissystemeffectively saves energy by activating lamps only when needed,increasing energy efficiency by nearly twofold compared to conventional systems,whilesupportingthedevelopmentofsmartandenvironmentally friendly PJU management.