**Data Logging** rev_01

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    - Project: **Data Logging**
    - Source Code NOT compiled for: ESP32 DevKit V1
    - Source Code created on: 2025-02-25 09:06:44

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/****** SYSTEM REQUIREMENTS *****/
/****** SYSTEM REQUIREMENT 1 *****/
    /* ESP32 connects to RS485 & SD Card  Reads data */
    /* every second and logs to CSV  Displays data as */
    /* curves on the touchscreen Uses LVGL GUI */
    /* Touchscreen buttons allow pause, scale change, and */
    /* clearing  Tap "Export" button to send email with */
    /* CSV */
/****** END SYSTEM REQUIREMENTS *****/

/* START CODE */

/****** DEFINITION OF LIBRARIES *****/
#include <SPI.h>
#include <SdFat.h>  //https://github.com/greiman/SdFat

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

/***** DEFINITION OF SPI PINS *****/
const uint8_t mySDCardModule_SDCardModule_SPI_PIN_MOSI_D23      = 23;
const uint8_t mySDCardModule_SDCardModule_SPI_PIN_MISO_D19      = 19;
const uint8_t mySDCardModule_SDCardModule_SPI_PIN_SCLK_D18      = 18;
const uint8_t mySDCardModule_SDCardModule_SPI_PIN_CS_D5     = 5;

/****** DEFINITION OF LIBRARIES CLASS INSTANCES*****/
// Create an instance of the SdFat class
SdFat SD;

// Variables for logging and timing
unsigned long previousMillis = 0; // Store last time data was logged
const long interval = 1000; // Interval for logging data (1 second)

// Function prototypes for additional functionalities
void logDataToCSV();
void sendEmailWithCSV();

void setup(void)
{
    // put your setup code here, to run once:
    pinMode(mySDCardModule_SDCardModule_SPI_PIN_CS_D5, OUTPUT);
    // start the SPI library:
    SPI.begin();

    // Initialize SD card
    if (!SD.begin(mySDCardModule_SDCardModule_SPI_PIN_CS_D5)) {
        Serial.println("SD Card initialization failed!");
        return;
    }
    Serial.println("SD Card initialized successfully.");
}

void loop(void)
{
    // put your main code here, to run repeatedly:
    unsigned long currentMillis = millis();
    if (currentMillis - previousMillis >= interval) {
        previousMillis = currentMillis;
        logDataToCSV(); // Log data every second
    }
}

// Function to log data to CSV
void logDataToCSV() {
    // Implement the logic to read data from RS485 and log it to CSV
    // This is a placeholder for the actual implementation
    Serial.println("Logging data to CSV...");
}

// Function to send email with CSV
void sendEmailWithCSV() {
    // Implement the logic to send email with the CSV file
    // This is a placeholder for the actual implementation
    Serial.println("Sending email with CSV...");
}

/* END CODE */