Project Description:

The Smart Water Inventory ATM System is an IoT-based solution designed to automate and regulate the distribution of clean drinking water, especially in rural or water-scarce urban areas. It functions like an ATM but dispenses water instead of cash, using smart cards or OTP-based authentication to ensure fair, trackable, and efficient distribution.

This system monitors available water inventory, user usage, and supports real-time data logging, allowing municipalities or private operators to manage resources better and reduce wastage.

Technologies Used:

• Backend: PHP / Node.js / Java (for user management, inventory tracking, and API handling)

• Frontend (Admin/User Portal): HTML, CSS, Bootstrap, JavaScript

• IoT Components:

  • Microcontroller: Arduino / ESP32

  • Sensors: Flow sensor, water level sensor

  • Actuators: Solenoid valve for dispensing

  • RFID Reader / OTP keypad (for authentication)

  • Wi-Fi Module: ESP8266 for cloud connectivity

  • LCD / LED Display: For instructions and status

Core Features:

1. User Authentication:

   • Smart card or OTP-based authentication system.

   • Optional facial recognition for enhanced security.

2. Automated Dispensing:

   • Once authenticated, water is dispensed in preset units (e.g., 5L, 10L).

   • Flow sensor ensures accurate quantity control.

3. Real-Time Inventory Management:

   • Tracks how much water is dispensed.

   • Monitors tank levels using sensors.

4. Data Logging & Cloud Sync:

   • Logs each transaction with user ID, time, and amount.

   • Sends data to cloud server for monitoring/reporting.

5. User Portal:

   • Users can check balance, usage history, and recharge smart card.

6. Admin Dashboard:

   • View inventory levels across locations.

   • Set quotas, user limits, generate usage reports.