Arduino:
텍스트 파일 읽기

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

void setup() {
  Serial.begin(9600);
  while (!Serial) {
    ; // wait for serial port to connect.
  }

  if (!SD.begin(4)) {
    Serial.println("SD card initialization failed!");
    return;
  }
  
  File dataFile = SD.open("example.txt");
  if (dataFile) {
    while (dataFile.available()) {
      Serial.write(dataFile.read());
    }
    dataFile.close();
  } else {
    Serial.println("File open failed!");
  }
}

void loop() {
  // Nothing here
}