Development of IoT-based automatic rain gauge using NodeMCU for rainfall measurement

Ghazali, Ummi Mardhiah (2021) Development of IoT-based automatic rain gauge using NodeMCU for rainfall measurement. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Meteorologists and hydrologists use a type of instrument to collect and measure the amount of liquid within period of time which is called as rain gauge. Before technology evolved, measurement was carried out through manual method of conventional rain gauge or standard rain gauge. Basically, when measurement is obtained, the water in container is measured in height using stick measure. After measurement are collected, the water needs to be discarded manually. Sometimes the accuracy of measurement may be incorrect and erroneous. Furthermore, it is also convenient if the data from rain gauge can be automatically collected. Therefore, an Internet of Things (IoT) based rain gauge system is developed to solve such issues. NodeMCU ESP8266 microcontroller is used to interface between input and outputs. It also has built in Wi-Fi capability, so the result can be transferred from the microcontroller to the phone app. The accumulated water is measured using water flow sensor where it allows the water to flow and directly discarded. Therefore, this ensure a more advanced and smooth measurement process. Solar panel and batteries are used as power source for the rain gauge system. The measurement result will be displayed on the LCD that is connected to the rain gauge system. In addition, the data will also be shown and stored on the Blynk application.

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