Interfacing SD Card Module with Arduino Nano

 

Circuit:- 

 

Code:-

#include "SD.h"
#include "SPI.h"

#define CS_PIN 10

File file;

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

  initializeSD();
  createFile("Hello.txt");
  writeToFile("Hello World");
  closeFile();

}

void loop() {
}

void initializeSD() {
  Serial.println("Initializing SD Card.....Please Wait");
  pinMode(CS_PIN, OUTPUT);

  if(SD.begin()) {
    Serial.println("SD Card ready to use !");
  } else {
    Serial.println("Error Initializing SD Card !");
    return;
  }
}

int createFile(char filename[]) {
  file = SD.open(filename, FILE_WRITE);

  if(file) {
    Serial.println("File Created Successfully");
    return 1;
  } else {
    Serial.println("Error Creating File !");
    return 0;
  }
}

int writeToFile(char text[]) {
  if(file) {
    file.println(text);
    Serial.println("Text Append Successful");
    return 1;
  } else {
    Serial.println("Error Appending Text !");
    return 0;
  }
}

void closeFile() {
  if(file) {
    file.close();
    Serial.println("File Closed !");
  }
}

Demo:-