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

#define SD_CS 5   // Chip Select pin for SD card

File file;

void setup() {
  Serial.begin(115200);

  if (!SD.begin(SD_CS)) {
    Serial.println("Card Mount Failed");
    return;
  }

  Serial.println("SD Card initialized.");

  file = SD.open("/data.txt", FILE_APPEND);
  if (!file) {
    Serial.println("Failed to open file");
    return;
  }

  file.println("ESP32 Data Logging Start");
  file.close();
}

void loop() {
  int sensorValue = analogRead(34);

  file = SD.open("/data.txt", FILE_APPEND);
  if (file) {
    file.print("Sensor Value: ");
    file.println(sensorValue);
    file.close();
    Serial.print("Logged: ");
    Serial.println(sensorValue);
  } else {
    Serial.println("Error opening file");
  }

  delay(2000);
}