Fuel Monitor rev_01

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    - Project: Fuel Monitor
    - Source Code NOT compiled for: Arduino Uno
    - Source Code created on: 2024-08-17 22:01:06

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/****** SYSTEM REQUIREMENTS *****/
/****** SYSTEM REQUIREMENT 1 *****/
    /* The application shall read fuel levels via a */
    /* potentiometer, displaying results on an I2C */
    /* LiquidCrystal display, and trigger an LED and */
    /* buzzer when fuel is critically low, enhancing user */
    /* interaction and safety. */
/****** SYSTEM REQUIREMENT 2 *****/
    /* a menu for lcd to adjust buzzer and led settings */
/****** END SYSTEM REQUIREMENTS *****/

/****** DEFINITION OF LIBRARIES *****/
#include <Wire.h>
#include <EasyButton.h> //https://github.com/evert-arias/EasyButton
#include <LiquidCrystal_I2C.h>  //https://github.com/marcoschwartz/LiquidCrystal_I2C

/****** FUNCTION PROTOTYPES *****/
void setup(void);
void loop(void);
void updateOutputs(void);
void displayFuelLevel(float fuelLevel);
void checkFuelLevel(float fuelLevel);
void menu(); // Function to handle the menu for adjusting settings

/***** DEFINITION OF ANALOG INPUT PINS *****/
const uint8_t fuelLevel_Potentiometer_Vout_PIN_A0       = A0;

/***** DEFINITION OF DIGITAL OUTPUT PINS *****/
const uint8_t led_LED_PIN_D3        = 3;
const uint8_t buzzer_ActiveBuzzer_output_PIN_D4     = 4;

/***** DEFINITION OF I2C PINS *****/
const uint8_t lcd_LCD1602I2C_I2C_SLAVE_ADDRESS      = 0x27; // Updated I2C address to common value for LCD

/***** DEFINITION OF OUTPUT RAW VARIABLES *****/
bool    led_LED_PIN_D3_rawData      = 0;
bool    buzzer_ActiveBuzzer_output_PIN_D4_rawData       = 0;

/****** DEFINITION OF LIBRARIES CLASS INSTANCES*****/
// Create an instance of the EasyButton class for button handling
#define BUTTON_PIN 2 // Define the button pin
EasyButton button(BUTTON_PIN); // Initialize EasyButton with the button pin

// Create an instance of the LiquidCrystal_I2C class for LCD handling
LiquidCrystal_I2C lcd(lcd_LCD1602I2C_I2C_SLAVE_ADDRESS, 20, 4); // Initialize LCD with I2C address and dimensions

void setup(void)
{
    // put your setup code here, to run once:

    pinMode(fuelLevel_Potentiometer_Vout_PIN_A0,    INPUT);
    pinMode(led_LED_PIN_D3,  OUTPUT);
    pinMode(buzzer_ActiveBuzzer_output_PIN_D4,   OUTPUT);

    // Initialize the LCD
    lcd.init();
    lcd.backlight(); // Turn on the backlight for the LCD

    // Initialize the button
    button.begin(); // Call begin to initialize the button
}

void loop(void)
{
    // put your main code here, to run repeatedly:

    updateOutputs(); // Refresh output data

    // Continuously read the status of the button
    button.read(); // Read the button state

    // Read fuel level from the potentiometer
    float fuelLevel = analogRead(fuelLevel_Potentiometer_Vout_PIN_A0) * (100.0 / 1023.0); // Convert to percentage

    // Display the fuel level on the LCD
    displayFuelLevel(fuelLevel);

    // Check the fuel level and update LED and buzzer
    checkFuelLevel(fuelLevel);

    // Check if the button is pressed to open the menu
    if (button.read()) {
        menu(); // Open the menu for adjusting settings
    }
}

void updateOutputs()
{
    digitalWrite(led_LED_PIN_D3, led_LED_PIN_D3_rawData);
    digitalWrite(buzzer_ActiveBuzzer_output_PIN_D4, buzzer_ActiveBuzzer_output_PIN_D4_rawData);
}

void displayFuelLevel(float fuelLevel) {
    lcd.setCursor(0, 0);
    lcd.print("Fuel Level: ");
    lcd.print(fuelLevel);
    lcd.print(" %");
}

void checkFuelLevel(float fuelLevel) {
    if (fuelLevel < 15.0) { // Critical level threshold
        led_LED_PIN_D3_rawData = HIGH; // Turn on LED
        buzzer_ActiveBuzzer_output_PIN_D4_rawData = HIGH; // Turn on Buzzer
    } else {
        led_LED_PIN_D3_rawData = LOW; // Turn off LED
        buzzer_ActiveBuzzer_output_PIN_D4_rawData = LOW; // Turn off Buzzer
    }
}

void menu() {
    // Simple menu implementation to adjust buzzer and LED settings
    lcd.clear();
    lcd.setCursor(0, 0);
    lcd.print("Menu:");
    lcd.setCursor(0, 1);
    lcd.print("1: Buzzer ON/OFF");
    lcd.setCursor(0, 2);
    lcd.print("2: LED ON/OFF");
    lcd.setCursor(0, 3);
    lcd.print("Press button to select");

    // Wait for button press to select an option
    while (!button.read()) {
        // Do nothing, just wait
    }

    // Implement the logic to toggle buzzer and LED settings
    // This is a placeholder for the actual implementation
    // You can add more detailed logic here based on user input
}

/* END CODE */