Smart AgroSensor is an intelligent irrigation decision support system built using low-cost agroclimatic sensors and machine learning. Designed for deployment on farms, the system uses an Arduino Mega 2560 and Raspberry Pi 3 to monitor variables such as soil moisture and light levels. It supports both manual and automatic irrigation modes and includes a web-based control interface. Python-based scripts facilitate data logging, model training with scikit-learn, and real-time irrigation decisions, making it an adaptable and affordable platform for precision irrigation in small-scale settings.