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

#define CS_PIN 5

File root;

void setup() {
  Serial.begin(115200);
  Serial.print("Initializing SD card... ");

  if (!SD.begin(CS_PIN)) {
    Serial.println("Card initialization failed!");
    while (true);
  }

  Serial.println("Initialization done.");

  // Example of writing to a file on the SD card:
  File writeFile = SD.open("/wokwi.txt", FILE_WRITE);
  if (writeFile) {
    Serial.println("Writing to example.txt...");
    writeFile.println("Hello from ESP32!");
    writeFile.close();
    Serial.println("Write done.");
  } else {
    Serial.println("Error opening wokwi.txt for writing!");
  }

  // Example of reading a file from the SD card:
  File readFile = SD.open("/wokwi.txt");
  if (readFile) {
    Serial.println("Reading from wokwi.txt:");
    while (readFile.available()) {
      Serial.write(readFile.read());
    }
    readFile.close();
    Serial.println("\nRead done.");
  } else {
    Serial.println("Error opening example.txt for reading!");
  }
}

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