Saving water with water level detection in a smart home bathtub using ultrasonic sensor and Fuzzy logic

Water is essential for everybody in earth. Unfortunately, in their dwelling, sometime people forgot to turn off the water tab, which makes water wasteful. When water flooding in a house, it can cause disturbance to the neighbors. At the same time, some place in the country, has limited water available. The objective of this study is to save water waste by developing saving water tool. It used detection water level to save water. This study proposes the development of saving water tool by using automatic device which open and close the water-tab to reduce water wastage. When the bath tub is full of water, smart home will decide to close the water-tap automatically. This study uses ultrasonic sensor to detect water level. When the sensor is reading the water surface and it closes to the ultrasonic sensor, a higher water will be indicatad, and before the flood happens the water-tap will be closed. This study uses Arduino Uno and fuzzy logic algorithm. Fuzzy logic approach was used to analyze the water level indication to make the water stops in the right time.