Article’s

The dairy sector in India faces persistent challenges such as manual milk quality assessment, lack of pricing transparency, and inefficient record management at collection centers. To address these issues, this paper presents a Smart IoT-Enabled Milk Quality Analyzer and Automated Billing System that integrates embedded sensing technology with digital communication and database management. The system uses an ESP32 microcontroller interfaced with a load cell (HX711), pH sensor, TDS/EC sensor, and DS18B20 temperature sensor to measure key milk quality parameters including fat percentage, Solids-Not-Fat (SNF), protein content, pH value, electrical conductivity, and total weight. The collected data is processed and stored in a centralized MySQL database and visualized through a Python-based Tkinter administrative dashboard for efficient monitoring and management. An automated billing system calculates payments based on configurable daily rate parameters, while a SIM800L GSM module sends real-time SMS notifications to farmers containing detailed test results and payment information. Field validation shows that the system achieves acceptable accuracy compared to commercial analyzers, completing the entire testing and billing process in under 60 seconds. With an estimated cost of INR 5,000–9,000, the proposed system is affordable, portable, and scalable, making it highly suitable for rural dairy environments and capable of improving transparency and efficiency in milk procurement processes.