#include <SPI.h>
#include <SD.h>
#define chipSelect 5

void setup() {
  Serial.begin(9600);

  while (!Serial) {
    ; // wait for Serial Monitor to connect
  }

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

  if (!SD.begin(chipSelect)) {
    Serial.println("Card failed, or not present");
    return;
  }

  Serial.println("card initialized.");
  
  // Open the file for reading
  File file = SD.open("/data.txt");

  if (file) {
    Serial.println("File content:");

    // read the file line by line
    while (file.available()) {
      Serial.write(file.read());
    }

    file.close();
  } else {
    Serial.println("Error opening file");
  }
}

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