Design and Implementation of Smart Bath Water Heater using Arduino

The use of hot water used for bathing is one type of utilization of technology that has been developed. By using a Water Heater tool, one can get water with a higher temperature. However, to achieve the desired temperature and fill the tub for ready use, water heater takes a long time. In this system has been designed an automatic faucet that can be active in accordance with the temperature of water that is in the main tub with the help of temperature sensors, ultrasonic sensors and water pumps. Both sensors utilize a machine to machine system with MQTT protocols controlled by an Arduino Mega2560-based Android microcontroller. Based on the test, the level of accuracy of temperature obtained has a value of 97.60% with the average performance time obtained to achieve the desired temperature on the main tube is for 18 minutes 30 seconds. The test has been done using the main tub with the volume of water to be filled is +/- 12.320 cm(3), with the volume of hot water provided is +/- 9.240 cm(3). In addition, several factors affecting the time to reach the desired temperature include the type of pump used, the power used by the water heater, and the size of the main tubing container used as a container for mixing hot water temperatures and normal water temperature.