IoT-Based Lettuce Hydroponic Monitoring and Controlling System in a Horticulture Greenhouse
DOI:
https://doi.org/10.65359/sintika.2026.23.130Keywords:
NFT Hydroponics, Internet of Things (IoT), Monitoring and Controlling, pH, Total Dissolved Solids (TDS)Abstract
Manually monitoring pH and Total Dissolved Solids (TDS) in hydroponic farming can slow down adjusting nutrient solution conditions. This study aimed to develop an IoT-based system for monitoring and controlling pH and TDS in hydroponic lettuce (Lactuca sativa L.) using the Nutrient Film Technique (NFT). The system was developed using the ADDIE method, which includes analysis, design, development, implementation, and evaluation stages. The system uses an ESP32 to process sensor data and send real-time measurements to an Android app while storing data online. Test results show the pH sensor has 95.74% accuracy with a 4.26% error, while the TDS sensor reached 93.74% accuracy with a 6.26% error. The system can automatically monitor, record data, and control nutrients based on TDS ranges according to plant age.
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