Automatic controlling system and IoT based monitoring for pH rate on the aquaponics system

Abstract

Aquaponics is an opportunity for cultivating plants and fish. Plants use nutrients from fish feces and the fishes use clean water after being filtered by plant roots. The results of fish metabolism, food residue, and temperature change will affect the pH rate. An automatic control system and monitoring pH rate on aquaponics system is designed to maintain the pH rate within a certain range. The method used is a literature study to find the basic theory in designing a control system and monitoring water pH levels. Afterward, it’s necessary to find out the arising problems. The next step to do is designing the system, starting from flow diagrams to system design. The last step to do is simulating the tools that have been designed and then testing the system. Based on the results, it can be concluded that the system could maintain the water condition automatically in pH range from 6.3 to 7.7. The average error found in this sensor was 0.67%, the average decrease in water pH level was 0.023 per day, and the controlling interval was every 42 seconds, the success rate of sending monitoring data was 100% in which the data was sent every 1 minute in 1 hour.