Embedded System Development of Automatic Water Quality and Growing LED Control System to Maintain Hydroponic Plant Growth

— Hydroponics is a farming technology using water media that has been mixed with mineral nutrients that are continuously flowed to plant roots for 24 hours every day. The height of water reserves, water temperature, water nutrient content and water pH are some of the factors that need to be considered in growing crops using the hydroponic method. The function of automatic control of water quality and light requirements is very important to maintain the growth of hydroponic plants. The function of automatic control of water quality can be accomplished by developing software from a hardware system equipped with a dosingpump module for adding mineral nutrients and/or adjusting pH to water. Periodically the system will maintain water quality based on the calculation of input data obtained from water quality sensors, as well as report the quality of water from hydroponic plants directly through a computer network based on TCP/IP. In this study, a complete minimum system model with a hydroponic farming system and LED grow-light will be developed which is the result of improvements from previous research. The water pH and water conductivity (EC) sensors can be activated simultaneously. The dosing-pump module is used to add a liquid that regulates the pH value of water and plant nutrient fluids automatically according to the specified target, and the LED grow-light will automatically turn on and off to help maximize hydroponic plant growth. An Embedded WEB application is also available to increase the ease of monitoring. Keywords—Remote control and monitoring, Automatic Control, Hydroponic water quality