SD Card for storing data Arduino Santiapps

Arduino Honduras Santiapps Marcio Valenzuela

Tutorial SD Card

Almacenar datos en SD.  SDCardReadWrite.ino.


  1. Computadora (mac)
  2. Arduino MEGA (u otra variante Arduino) o incluso Arduino clone, Edison, Raspberry…  Este tutorial en particular usa una Arduino MEGA.
  3. Modulo con SD
  4. Breadboard
  5. Arduino IDE (

El código:

#include <SD.h>

File myFile;

void setup()
// Open serial communications and wait for port to open:
while (!Serial) {
; // wait for serial port to connect. Needed for Leonardo only

Serial.print(“Initializing SD card…”);
// On the Ethernet Shield, CS is pin 4. It’s set as an output by default.
// Note that even if it’s not used as the CS pin, the hardware SS pin 
// (10 on most Arduino boards, 53 on the Mega) must be left as an output 
// or the SD library functions will not work. 
pinMode(10, OUTPUT);

if (!SD.begin(4)) {
Serial.println(“initialization failed!”);
Serial.println(“initialization done.”);

// open the file. note that only one file can be open at a time,
// so you have to close this one before opening another.
myFile =“test.txt”, FILE_WRITE);

// if the file opened okay, write to it:
if (myFile) {
Serial.print(“Writing to test.txt…”);
myFile.println(“testing 1, 2, 3.”);
// close the file:
} else {
// if the file didn’t open, print an error:
Serial.println(“error opening test.txt”);

// re-open the file for reading:
myFile =“test.txt”);
if (myFile) {

// read from the file until there’s nothing else in it:
while (myFile.available()) {
// close the file:
} else {
// if the file didn’t open, print an error:
Serial.println(“error opening test.txt”);

void loop()
// nothing happens after setup

Ese proyecto se puede ver aquí:

Ini SD card…initialization done.
Escribimos a prueba.txt…Initializing SD card…initialization done.
Escribimos a prueba.txt…Listo!
probando 1, 2, 3.

Arduino Tutorial SD Card Santiapps Marcio Valenzuela
Arduino Tutorial SD Card

Es todo!  Ahora podemos almacenar nuestros datos de interés!

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