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The development of smart flood monitoring system using ultrasonic sensor with blynk applications

This paper presents the development of a smart flood monitoring system using Blynk platform as a medium of data transmission. This system is based on two NodeMCU development board integrated using Blynk application (IOS or android). The first NodeMCU is placed at the flood area, whilst the second NodeMCU acts as the control unit. Transmitter unit consisting of first NodeMCU, an ultrasonic sensor will detect the water level during flooding and display it on the LCD. Then, the data detected from the ultrasonic sensors will be sent to the Blynk application via wireless connection. The data are instantly collected and stored in a dedicated database for recording purposes. In order to alert the person in charge of the control unit, the data then will be send to second NodeMCU via Blynk bridge to trigger the buzzer and the LED. Based on the findings, the access to the system between first NodeMCU and second NodeMCU can be made within less or more than 50 meters. In the findings, it revealed that the system works well when the data sensed by the ultrasonic sensor display on the Blynk application and both buzzer and LED are functioning. The results obtained shown that the system is capable to tackle the flood problem in the affected area.