PROTOTYPE MONITORING DETEKSI DINI BANJIR BERBASIS INTERNET OF THINGS MENGGUNAKAN SENSOR ULTRASONIK DAN NODEMCU ESP8266 (STUDI KASUS: KAMPUNG NELAYAN KOTA DUMAI)

Abstract

Floods are a frequently occurring issue in Indonesia. Additionally, floods can disrupt
the activities of the surrounding communities. To address this problem, a flood early
detection system is proposed using ultrasonic sensors for water level detection. The
NodeMCU ESP8266 microcontroller is used for data processing, and the system is equipped
with a buzzer for warning alarms. Users can remotely monitor water levels by accessing a
website that displays water levels and the highest recorded water level data on a graph.
Testing results demonstrate that the system performs well. The prototype was tested with a
height limitation of 40 cm. Beyond this threshold, three water level statuses are identified: the
"SAFE" status exists when the water level distance from the sensor is ≥ 20 cm and ≤ 40 cm,
the "ALERT" status occurs when the distance is ≥ 11 cm and ≤ 20 cm, and the "DANGER"
status is triggered when the distance is ≤ 10 cm. In the "ALERT" status, the alarm buzzer
produces a sound with a 5-second delay, while in the "DANGER" status, the alarm buzzer
produces a continuous sound without delay.
Keywords : Monitoring, Ultrasonik, Buzzer, Esp8266, Internet of Things (IoT), website