DIY Coca Cola Vending Machine Using ESP32 and RFID Reader for Automation

The DIY Coca Cola Vending Machine is an innovative project combining the ESP32 microcontroller and an RFID reader to automate Coca Cola can distribution. It highlights the practical application of electronics to create an efficient and secure vending machine. Ideal for hobbyists, students, and IoT enthusiasts, this project offers hands-on experience in automation, electronics, and programming.

Objectives

• Automate the dispensing of Coca Cola cans.

• Use RFID for secure user authentication.

  
  

• Demonstrate the capabilities of the ESP32 in automation projects.

• Integrate a user-friendly LCD for real-time feedback.

• Offer a cost-effective solution for automated vending.

Key Features

• ESP32 Microcontroller Integration: Ensures efficient control and communication.

  
  

• RFID-Based Authentication: Provides secure and reliable user identification.

• Real-Time LCD Feedback: Enhances user experience with status updates.

• Automated Dispensing Mechanism: Powered by a motor controlled via an L298N driver.

• Audio Feedback: Delivers alerts and confirmations using a buzzer.

Application Areas

This project can be applied in:

• Small offices, schools, and recreational centers for controlled beverage distribution.

• Educational setups to teach microcontroller and RFID applications.

• Event venues and temporary kiosks requiring affordable vending solutions.

How It Works

1. RFID Authentication

• The RFID reader scans the user’s card.

• The ESP32 processes the card data and verifies credentials.

• Upon successful authentication, the vending cycle begins.

2. Dispensing Mechanism

• The ESP32 activates the relay module to start the motor.

• The motor, powered by an L298N driver, operates the mechanical system to release a Coca Cola can.

• An IR sensor detects the can’s release and sends confirmation to the ESP32.

3. User Feedback

• The LCD displays messages like “Please scan your card,” “Authenticating,” or “Dispensing Coca Cola.”

• The buzzer provides auditory feedback for successful or failed actions.

4. Power Management

• The power module regulates voltage to ensure stable operation of all components.

• The system uses a transformer to convert high-voltage AC to safe DC levels for the microcontroller and peripherals.

Components Used

Power Supply Module

• Transformer: Converts 220V AC to lower AC voltage.

• Bridge Rectifier & Capacitors: Provide smooth DC output for components.

Control Unit

• ESP32: Processes inputs and controls outputs.

• RFID Reader (RC522): Reads and authenticates RFID cards.

Display

• LCD Module: Provides real-time feedback to users.

Motor Control

• L298N Motor Driver: Manages motor speed and direction.

• DC Motor: Dispenses Coca Cola cans.

Sensors and Feedback

• IR Sensor: Confirms successful can dispensing.

• Buzzer: Delivers audio alerts and confirmations.

Possible Applications Using This Kit

Automated Door Lock System

Integrate the RFID reader and ESP32 to create a secure door lock system. Authorized users can unlock doors by scanning their RFID cards, with real-time feedback provided on an LCD.

Smart Attendance System

Develop an RFID-based attendance system for schools or offices. The ESP32 tracks and records attendance in real-time, streamlining the process.

The DIY Coca Cola Vending Machine is an excellent project for exploring the intersection of electronics and automation. By combining the ESP32 microcontroller, RFID reader, motor driver, and additional modules, this project demonstrates how simple components can create a robust and user-friendly system.