Abstract
In planting plants using an aquaponic system. Plants are very dependent on nutrients found in water, pH and water temperature. pH and temperature become one of the parameters that determine the yield. pH must be maintained in conditions 6.5–8.0 and temperature must be maintained at 18°-30° Celcius. Therefore, an automation system designed in order to keep the pH and temperature always at a predetermined range. Automation system designed using ARDUINO and RASPBERRY Pi microcontrollers with proportional control method. From the results of experiments that have been carried out, it is found that the designed device can control the temperature condition in the water by activating Peltier elements and fans or heaters to maintain the temperature conditions in water with fastest response time is 25.5 seconds for pH and 473.5 seconds for temperatures reaching setting determined.
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