The Beverages Dispensing Machine project is an innovative automation system designed to streamline the process of dispensing various beverages, enhancing both user experience and operational efficiency. With the increasing demand for automated solutions in cafés, restaurants, and events, this project utilizes an Arduino Uno microcontroller, a flow sensor, a Nextion touch display, and relay modules to control solenoid valves.

The goal is to create a user-friendly interface where customers can easily select their desired beverage and receive an accurate quantity without manual intervention. The incorporation of the flow sensor ensures that the amount dispensed is precisely measured, reducing waste and improving service speed. This project not only showcases the practical application of electronics and programming but also provides an engaging learning experience for those interested in automation technology.

Components used in this Project:

1. Arduino Uno: The microcontroller that serves as the brain of the project.
2. Nextion Touch Display: A touch-sensitive screen that allows users to select beverages and displays real-time information.
3. Flow Sensor: Measures the flow rate of the beverage to ensure accurate dispensing.
4. Solenoid Valves: Mechanically controlled valves that regulate the flow of different beverages.
5. Relay Module: Controls the solenoid valves, allowing for safe operation at higher currents.
6. Power Supply: Powers the Arduino and other components.
7. Jumper Wires: For connections between components.
8. Breadboard: Useful for prototyping the circuit.
9. Beverage Containers: Holds the various beverages to be dispensed.

Working Principle of the Project:

User Interface: The Nextion touch display presents an intuitive graphical interface where users can select their preferred beverage. It also shows the quantity to be dispensed and the status of the dispensing process.

Selection and Dispensing:

• When a beverage is selected on the Nextion display, the Arduino processes the command.
• The Arduino activates the corresponding relay module to open the solenoid valve for the selected beverage.

Flow Measurement:

• The flow sensor, placed inline with the beverage, sends pulse signals to the Arduino as the liquid flows.
• The Arduino counts the pulses to determine the volume dispensed, shutting off the solenoid valve once the desired amount is reached.

Feedback to User:

• The system provides real-time feedback on the Nextion display, confirming the completion of the dispensing process and showing the total amount dispensed.

Circuit Diagram:

Code:

#include <Nextion.h>

#define FLOW_SENSOR_PIN 2
#define RELAY1_PIN 3 // Relay for Beverage 1
#define RELAY2_PIN 4 // Relay for Beverage 2

volatile int pulseCount = 0;
float flowRate;
float totalLiters = 0;

// Nextion display objects
NexButton button1 = NexButton(0, 1, "b0"); // Button for Beverage 1
NexButton button2 = NexButton(0, 2, "b1"); // Button for Beverage 2

void setup() {
  Serial.begin(9600);
  pinMode(FLOW_SENSOR_PIN, INPUT);
  pinMode(RELAY1_PIN, OUTPUT);
  pinMode(RELAY2_PIN, OUTPUT);
  attachInterrupt(digitalPinToInterrupt(FLOW_SENSOR_PIN), countPulse, RISING);
}

Applications:

The Beverages Dispensing Machine project has a wide range of applications across various sectors. Here are some key applications:

1. Cafés and Restaurants

• Self-Service Stations: Customers can serve themselves from a selection of beverages, enhancing their experience and reducing wait times.
• Automated Drink Preparation: Streamlines the beverage preparation process, allowing staff to focus on other tasks while ensuring consistent quality.

2. Vending Solutions

• Smart Vending Machines: Integrate the dispensing machine into vending systems, providing an automated solution for on-the-go consumers looking for beverages in public spaces like parks, airports, and malls.

3. Events and Catering

• Party and Event Services: Ideal for catering companies that require a reliable way to serve drinks at large events, such as weddings, conferences, or festivals.
• Flexible Beverage Options: Quickly change the selection based on the type of event, offering a variety of drinks without requiring extensive manual labor.

4. Offices and Workplaces

• Employee Beverage Stations: Provides a convenient way for employees to access drinks, promoting a more relaxed workplace environment.
• Custom Beverage Options: Employees can choose their favorite beverages, encouraging hydration and satisfaction in the workplace.

5. Educational Institutions

• School Canteens: Schools can implement this machine to provide students with healthy drink options during lunch or snack breaks.
• Hands-On Learning: Serves as an educational tool for students learning about automation, programming, and electronics.

6. Health and Fitness Centers

• Smoothie and Juice Bars: Ideal for gyms or fitness centers, where customers can quickly access healthy beverages after workouts.
• Nutritional Control: Enables precise measurement of beverage portions, allowing users to track their intake accurately.

7. Hotels and Resorts

• Guest Beverage Stations: Enhances guest experience by providing easy access to beverages in lobbies or pool areas.
• Room Service Integration: Can be integrated with room service for easy delivery of drinks to guests.

8. Retail Stores

• Customer Engagement: Retailers can offer beverage samples or complimentary drinks to enhance customer experience and encourage longer visits.
• Promotional Events: Use the machine for promotional activities or product launches, allowing customers to sample new beverages.

9. Research and Development

• Testing Beverage Formulations: Beverage companies can use this machine to test different drink recipes or formulations in a controlled environment.
• Market Research: Collect data on consumer preferences for specific beverages and portion sizes.

10. Remote Locations

• Off-Grid Solutions: Useful in remote locations or during outdoor activities (e.g., camping, festivals) where traditional beverage service is not feasible.
• Solar-Powered Options: Can be designed to operate on renewable energy sources, making it sustainable and eco-friendly.

Conclusion:

The Beverages Dispensing Machine project exemplifies how modern automation can simplify and enhance service in beverage dispensing scenarios. By combining Arduino technology with user-friendly interfaces and precise flow control, this project offers a practical solution that can be easily expanded or modified for various applications. Further enhancements could include adding more beverage options, incorporating payment systems for a vending solution, or developing a mobile app for remote control and monitoring.