BRIEF INTRODUCTION

The Anytime Medicine Vending Machine is an automated system designed to dispense medicines securely and efficiently. Users are authenticated through RFID cards, ensuring that only authorized individuals can access the machine. Once authenticated, users interact with a keypad to select the desired medicine and specify the quantity. The Arduino Mega controls the dispensing mechanism via relays, managing stock levels and tracking sales data to prevent shortages. Meanwhile, an ESP8266 Wi-Fi module connects the system to the Blynk IoT platform, allowing remote monitoring of inventory, user activity, and transaction status through a smartphone app. This integration facilitates real-time updates and management, making medicine vending convenient, contactless, and reliable.

COMPONENTS LIST

BLOCK DIAGRAM

WORKING

The Anytime Medicine Vending Machine uses an Arduino Mega as the transmitter to authenticate users via RFID, allowing only authorized individuals to select and purchase medicines through a keypad interface. The system displays medicine options, stock levels, and pricing on an LCD, lets users select quantities, and confirms purchases before activating relays to dispense the medicines. All transaction details—including user information, selected medicines, quantities, costs, stock updates, and purchase status—are sent via serial communication to an ESP8266 receiver, which uploads the data to the Blynk cloud platform for real-time remote monitoring and management through a mobile app.

Transmitter (Arduino Mega) Side:

1. User Authentication:

   • When a user taps their RFID card, the RFID reader scans the card's unique ID.

   • The Arduino Mega checks if this UID is authorized.

2. Access Control:

   • If authorized, the LCD displays "Access Granted" and shows the medicine menu.

   • If not authorized, it displays "Access Denied."

3. Medicine Selection:

   • The user selects a medicine from the displayed menu using the keypad.

   • The Arduino shows the selected medicine and available stock on the LCD.

4. Quantity Selection:

   • The user inputs the desired quantity using the keypad.

   • The system verifies if enough stock is available.

5. Purchase Confirmation:

   • The total cost is calculated and displayed.

   • User confirms purchase by pressing a key.

6. Dispensing Medicine:

   • Corresponding relay(s) activate to dispense the selected quantity of medicine.

   • Stock quantity is updated and purchase status is displayed.

7. Data Transmission:

   • All relevant data (user name, selected medicines, quantities, cost, stock levels, and purchase status) are sent via serial to the ESP8266 receiver.

Receiver (ESP8266) Side:

1. Data Reception:

   • ESP8266 listens on serial for incoming data from Arduino Mega.

2. Data Parsing and Display:

   • Incoming data tagged by identifiers (A, B, C, etc.) are parsed.

   • Data is forwarded to Blynk cloud virtual pins.

3. Remote Monitoring:

   • Using the Blynk app, users can monitor user access, selected medicines, quantities, stock availability, and purchase status remotely in real-time.

IMAGES USED ARE FOR SAMPLE PURPOSES ONLY !!!!!!