Abstract
The application of Internet of Things technology has been widely implemented in plant monitoring and automatic irrigation systems; however, the integration of soil moisture monitoring, soil pH monitoring, irrigation control, fertilization control, and notification features into a single system for oil palm seedling cultivation remains limited. This study aims to design and evaluate a prototype of an IoT-based monitoring and control system for oil palm seedling cultivation. The research employed a research and development approach using the waterfall system development model, which includes requirement analysis, system design, implementation, and testing. Data were collected through direct observation of sensor readings, actuator responses, and the connectivity of the Blynk application, and were analyzed descriptively. The test results from the sensors obtained an error value of 0.0253% for the humidity sensor and 0.0585% for the soil pH sensor. The developed system successfully integrates ESP32, sensors, relays, pumps, liquid crystal display, and the Blynk application to enable real-time monitoring, automatic irrigation control, fertilization control, and remote notifications. These findings highlight that IoT integration contributes to improving the efficiency of monitoring and managing oil palm seedling cultivation.