GRAIN SILO ROBOT: AN IoT-BASED AUTOMATED SYSTEM FOR REAL-TIME GRAIN STORAGE MONITORING USING ESP32 AND BLYNK

This paper presented the Grain Silo Robot, an IoT-based mobile robotic system for automated real-time monitoring of grain storage conditions. The system successfully integrates ESP32, DHT11, L298N motor driver, and Blynk into a cohesive, low-cost solution. Experimental results demonstrated temperature deviations of 0.2–0.8°C and humidity deviations of 1% RH, confirming the reliability of the sensing system. The robot's mobility enables data collection from multiple silo locations, addressing the spatial limitation of static installations. Battery autonomy of 3.5–4 hours and effective Wi-Fi range of 15–20 meters validate the system's operational feasibility. The proposed system demonstrates that affordable embedded hardware combined with IoT platforms can provide practical solutions to agricultural storage challenges. Future Work: Replacing DHT11 with DHT22 or SHT31 for improved precision; integrating MQ-series gas sensors for CO2 and ammonia detection; adding ultrasonic sensors for grain level measurement; upgrading the chassis for real industrial environments; implementing autonomous navigation with obstacle avoidance; and cloud-based data logging with automated threshold alerts.

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