Sorry, I did it wrong and did another post saying that I have also tried with a 2GB SD card, mi mistake.
The 2GB SD card isn't working either.
The SD card module I am using is:
http://www.dhgate.com/product/dhgate/124326680.html?utm_source=pla&utm_medium=GMC&utm_campaign=seepuelectronic&utm_term=124326680&f=bm|124326680|104007-ComputerComponents|GMC|Adwords|pla|seepuelectronic|GB|104007014-OtherComputerComponents|c||&gclid=CKeOh_eLy7kCFUXJtAodcB0Amg
When running the cardinfo example says that wiring is correct. The wiring is as follows:
ARDUINO SD CARD MODULE
5V-----------------5V
D4----------------CS
D11--------------MOSI
D13--------------SCK
D12-------------MISO
GND------------GND
What can I do to close the file properly?
The code used is the arduino example datalogger, this is:
/*
SD card datalogger
This example shows how to log data from three analog sensors
to an SD card using the SD library.
The circuit:
- analog sensors on analog ins 0, 1, and 2
- SD card attached to SPI bus as follows:
** MOSI - pin 11
** MISO - pin 12
** CLK - pin 13
** CS - pin 4
created 24 Nov 2010
modified 9 Apr 2012
by Tom Igoe
This example code is in the public domain.
*/
#include <SD.h>
// On the Ethernet Shield, CS is pin 4. Note that even if it's not
// used as the CS pin, the hardware CS pin (10 on most Arduino boards,
// 53 on the Mega) must be left as an output or the SD library
// functions will not work.
const int chipSelect = 4;
void setup()
{
// Open serial communications and wait for port to open:
Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for Leonardo only
}
Serial.print("Initializing SD card...");
// make sure that the default chip select pin is set to
// output, even if you don't use it:
pinMode(10, OUTPUT);
// see if the card is present and can be initialized:
if (!SD.begin(chipSelect)) {
Serial.println("Card failed, or not present");
// don't do anything more:
return;
}
Serial.println("card initialized.");
}
void loop()
{
// make a string for assembling the data to log:
String dataString = "";
// read three sensors and append to the string:
for (int analogPin = 0; analogPin < 3; analogPin++) {
int sensor = analogRead(analogPin);
dataString += String(sensor);
if (analogPin < 2) {
dataString += ",";
}
}
// open the file. note that only one file can be open at a time,
// so you have to close this one before opening another.
File dataFile = SD.open("datalog.txt", FILE_WRITE);
// if the file is available, write to it:
if (dataFile) {
dataFile.println(dataString);
dataFile.close();
// print to the serial port too:
Serial.println(dataString);
}
// if the file isn't open, pop up an error:
else {
Serial.println("error opening datalog.txt");
}
delay(4000);
}