"Vending Simulation" rev_01

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    - Project: "Vending Simulation"
    - Source Code NOT compiled for: Arduino Uno
    - Source Code created on: 2024-12-09 21:56:20

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/****** SYSTEM REQUIREMENTS *****/
/****** SYSTEM REQUIREMENT 1 *****/
    /* The project aims to create an interactive Arduino */
    /* application that utilizes connected components for */
    /* sensor data collection and real-time feedback. The */
    /* code should efficiently manage input/output */
    /* operations and ensure reliable performance. */
/****** END SYSTEM REQUIREMENTS *****/

/* START CODE */

/****** DEFINITION OF LIBRARIES *****/
#include <Wire.h> // Include Wire library for I2C communication
#include <Servo.h> // Include Servo library for controlling servo motors

/****** FUNCTION PROTOTYPES *****/
void setup(void);
void loop(void);

// Define items, prices, and stock for the vending machine
const char* items[] = {"Soda", "Chips", "Candy"}; // Example items
float prices[] = {1.50, 1.00, 0.75}; // Example prices
int stock[] = {5, 5, 5}; // Example stock levels

void setup(void)
{
    // Initialize serial communication for debugging
    Serial.begin(9600);

    // Initialize I2C communication
    Wire.begin();

    // Initialize servo motors (if used)
    // Servo myServo; // Uncomment and define your servo if needed
    // myServo.attach(9); // Attach to pin 9 (example)
}

void loop(void)
{
    // Display available items and their prices
    Serial.println("Available items:");
    for (int i = 0; i < sizeof(items) / sizeof(items[0]); i++) {
        Serial.print(i + 1);
        Serial.print(". ");
        Serial.print(items[i]);
        Serial.print(" - $");
        Serial.print(prices[i]);
        Serial.print(" (Stock: ");
        Serial.print(stock[i]);
        Serial.println(")");
    }

    // Simulate user input for item selection
    int choice = 1; // Example choice (this should be replaced with actual input handling)
    if (choice < 1 || choice > sizeof(items) / sizeof(items[0])) {
        Serial.println("Invalid choice.");
        return;
    }
    if (stock[choice - 1] == 0) {
        Serial.println("Out of stock.");
        return;
    }
    int item_index = choice - 1;

    // Simulate payment
    float payment = 2.00; // Example payment (this should be replaced with actual input handling)
    if (payment < prices[item_index]) {
        Serial.println("Insufficient payment. Transaction cancelled.");
        return;
    }
    float change = payment - prices[item_index];
    Serial.print("Payment accepted. Change to return: $");
    Serial.println(change);

    // Dispense the selected item
    stock[item_index] -= 1;
    Serial.print("Dispensing ");
    Serial.println(items[item_index]);

    delay(5000); // Delay for 5 seconds before the next loop iteration
}

/* END CODE */