arduino data logger

you can store sensor readings in text file, and seperate them with commar. then change file extension to csv, and most spreadsheet apps will recognize it.

you can store sensor readings in text file, and seperate them with commar. then change file extension to csv, and most spreadsheet apps will recognize it.

am using atmega2560 and ethernet sheild..i cant save the txt file i tried with the cardinfo pgm but the car info hasnot retrived..

/*

  SD card test

This example shows how use the utility libraries on which the'

SD library is based in order to get info about your SD card.

Very useful for testing a card when you're not sure whether its working or not.

The circuit:

  * SD card attached to SPI bus as follows:

** MOSI - pin 11 on Arduino Uno/Duemilanove/Diecimila

** MISO - pin 12 on Arduino Uno/Duemilanove/Diecimila

** CLK - pin 13 on Arduino Uno/Duemilanove/Diecimila

** CS - depends on your SD card shield or module.

  Pin 4 used here for consistency with other Arduino examples

created  28 Mar 2011

by Limor Fried

modified 9 Apr 2012

by Tom Igoe

*/

// include the SD library:

#include <SPI.h>

#include <SD.h>

// set up variables using the SD utility library functions:

Sd2Card card;

SdVolume volume;

SdFile root;

// change this to match your SD shield or module;

// Arduino Ethernet shield: pin 4

// Adafruit SD shields and modules: pin 10

// Sparkfun SD shield: pin 8

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("\nInitializing 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(chipSelect, OUTPUT);

  pinMode(10,OUTPUT);

  pinMode(53, OUTPUT);     // change this to 53 on a mega

  // we'll use the initialization code from the utility libraries

  // since we're just testing if the card is working!

  if (!card.init(SPI_HALF_SPEED, chipSelect)) {

    Serial.println("initialization failed. Things to check:");

    Serial.println("* is a card is inserted?");

    Serial.println("* Is your wiring correct?");

    Serial.println("* did you change the chipSelect pin to match your shield or module?");

    return;

  } else {

    Serial.println("Wiring is correct and a card is present.");

  }

  // print the type of card

  Serial.print("\nCard type: ");

  switch (card.type()) {

    case SD_CARD_TYPE_SD1:

      Serial.println("SD1");

      break;

    case SD_CARD_TYPE_SD2:

      Serial.println("SD2");

      break;

    case SD_CARD_TYPE_SDHC:

      Serial.println("SDHC");

      break;

    default:

      Serial.println("Unknown");

  }

  // Now we will try to open the 'volume'/'partition' - it should be FAT16 or FAT32

  if (!volume.init(card)) {

    Serial.println("Could not find FAT16/FAT32 partition.\nMake sure you've formatted the card");

    return;

  }

  // print the type and size of the first FAT-type volume

  uint32_t volumesize;

  Serial.print("\nVolume type is FAT");

  Serial.println(volume.fatType(), DEC);

  Serial.println();

  volumesize = volume.blocksPerCluster();    // clusters are collections of blocks

  volumesize *= volume.clusterCount();       // we'll have a lot of clusters

  volumesize *= 512;                            // SD card blocks are always 512 bytes

  Serial.print("Volume size (bytes): ");

  Serial.println(volumesize);

  Serial.print("Volume size (Kbytes): ");

  volumesize /= 1024;

  Serial.println(volumesize);

  Serial.print("Volume size (Mbytes): ");

  volumesize /= 1024;

  Serial.println(volumesize);

  Serial.println("\nFiles found on the card (name, date and size in bytes): ");

  root.openRoot(volume);

  // list all files in the card with date and size

  root.ls(LS_R | LS_DATE | LS_SIZE);

}

void loop(void) {

}

this is the code...