IOT Base Soil Nutrient and Fertilizer Monitoring System For Smart Agriculture

Abstract

In smart agriculture, accurate monitoring of soil is necessary for the maximization of crop yield and sustainable farming. In this project an Iot Base Soil Nutrient and Fertilizer Monitoring System for Smart Agriculture that can monitor soil remotely on a real time basis is proposed which works on ESP32 microcontroller. The system includes a 3-in-1 NPK (Nitrogen, Phosperous, Potassium), DS18B20 temp sensor and capacitive soil moisture sensor. These sensors acquire environmental parameters, that showed on a 0.96-inch OLED display and also sent at the same time to mobile application designed with MIT App Inventor using MQTT protocol. The RS485 bus is used for communication between ESP32 and the NPK sensor, MP1584 buck converter steps down 12V switching adapter to a safe 5V work voltage. I use the MQTT broker named broker. emqx. io, as it supports low latency light communication for IoT data. The product enables data driven predictive farming, controlling the environmental factors that affects yield and crop quality of yields. Scalable, less expensive and an effective technique for monitoring the agricultural field in real time can provide insightful information to farmers to improve productivity and resource utilization.