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

File dataFile;
const int chipSelect = 10; // Change this to match your SD card module's chip select pin

void setup() {
  // Open serial communication and initialize the SD card
  Serial.begin(9600);

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

  Serial.println("SD card initialized successfully.");

  // Create a CSV file named "data.csv" and open it for writing
  dataFile = SD.open("data.csv", FILE_WRITE);

  if (dataFile) {
    Serial.println("Writing to data.csv...");

    // Write header row
    dataFile.println("Sensor1, Sensor2, Sensor3");
    // Write data rows
    dataFile.println("100, 200, 300");
    dataFile.println("150, 250, 350");

    // Close the file
    dataFile.close();
    Serial.println("Data written to data.csv.");
  } else {
    Serial.println("Error opening data.csv.");
  }
}

void loop() {
  // Your main program loop (if needed)
}