Monitoring System of Water Quality on Hydroponic Planting Media using Total Dissolved Solid (TDS) Sensor Based Arduino Uno R3

A water quality monitoring system in hydroponics with a Total Dissolved Solid Sensor (TDS) equipped the Arduino UNO microcontroller has been developed. The TDS SEN0244 sensor read sensitivity, which will display value of reading on LCD. Furthermore, if output is less than 2.30 Volts or 1000 ppm, buzzer sound once, and dosing pump rotate to automatically add nutrients B. twice more 2.40 1200 ppm. When sensitivity (well water) 400 relevant results were obtained, namely, - ppm when 4 5 mL nutrient solution was added capacity fewer 6 liters. appropriate obtained testing several samples. However, salt soapy samples, voltage unstable experienced an error. Implementing this expected make it easier for community, especially farmers, cultivate hydroponic plants.