RANCANG BANGUN SYSTEM ALARM ANTI MALING PADA POMPA AIR DISAWAH BERBASIS IOT

Abstract
This research develops an IoT security system to prevent water pump theft on agricultural land, particularly in Ponorogo Regency. The system consists of a PIR sensor for human movement detection, an ESP32 microcontroller as the main processor, a LoRa module for wireless communication up to a radius of ±5 km, and a buzzer as a local alarm. Motion information is transmitted via LoRa to a receiver unit at home, processed by a second ESP32, and displayed via the Blynk application on a smartphone. The research method includes literature and field studies, hardware and software design, and comprehensive testing of each component. Test results show that the system detects motion within a sensor radius of 2–2.5 m and successfully sends signals up to a distance of 1.5 km with a response time of approximately 2 seconds. Distances greater than 1.5 km result in signal failure, resulting in an inactive alarm. The conclusion shows that this system is effective in detecting human movement and providing real-time notifications to users. However, communication range is limited to a distance of less than 1.5 km.
Recommendations for further development include: integrating ultrasonic sensors for an additional layer of detection, using backup power sources such as UPS or batteries, and implementing a waterproof enclosure and sensor cover to increase the system's resistance to physical damage.
Keywords: IoT, Water Pump, PIR Sensor, Alarm, LoRa