#include <SD.h>
#include <SPI.h>

// Pin connected to the SD card select pin
const int chipSelect = 4;

void setup() {
  // Open serial communications and wait for port to open:
  Serial.begin(9600);
  while (!Serial) {
    ; // wait for serial port to connect. Needed for native USB port only
  }

  Serial.print("Initializing SD card...");

  if (!SD.begin(chipSelect)) {
    Serial.println("Initialization failed!");
    return;
  }
  Serial.println("Initialization done.");

  // Open the file
  File file = SD.open("IP.txt");
  if (file) {
    // Read the IP address from the file
    String ip_address = file.readStringUntil('\n');
    file.close();

    // Split the IP address into its components
    int parts[4];
    int partIndex = 0;
    int startPos = 0;
    for (int i = 0; i < ip_address.length(); i++) {
      if (ip_address.charAt(i) == ',') {
        parts[partIndex++] = ip_address.substring(startPos, i).toInt();
        startPos = i + 1;
      }
    }
    parts[partIndex] = ip_address.substring(startPos).toInt();

    // Print the IP address as integers
    for (int i = 0; i < 4; i++) {
      Serial.print("Part ");
      Serial.print(i);
      Serial.print(": ");
      Serial.println(parts[i]);
    }
  } else {
    Serial.println("Error opening ip_address.txt");
  }
}

void loop() {
  // Nothing to do here
}

//code for replacing the ip address
/*#include <SD.h>
#include <SPI.h>

const int chipSelect = 10;
const int bufferSize = 32;
char buffer[bufferSize];

void setup() {
  Serial.begin(9600);
  
  if (!SD.begin(chipSelect)) {
    Serial.println("Initialization failed!");
    return;
  }
  
  Serial.println("Initialization done.");
}

void loop() {
  if (Serial.available()) {
    Serial.println("Enter the new IP address (format: x.x.x.x): ");
    while (Serial.available() < bufferSize) {} // Wait for user input
    Serial.readBytesUntil('\n', buffer, bufferSize);
    updateIPAddress();
  }
}

void updateIPAddress() {
  File file = SD.open("ip_address.txt", FILE_WRITE);
  if (file) {
    file.seek(0);
    file.write(buffer, strlen(buffer));
    file.close();
    Serial.println("IP address updated successfully.");
  } else {
    Serial.println("Error opening ip_address.txt");
  }
}
*/