Using the SD library to retrieve information over a serial port

This example shows how to read information about a SD card. The example reports volume type, free space and other information using the SD library, sending it over the serial port. Please click here for more information on the SD library.

Hardware Required

  • Arduino or Genuino board
  • Ethernet Shield (or other board with an SD slot)
  • Formatted SD card

Circuit

image developed using Fritzing. For more circuit examples, see the Fritzing project page

The Arduino or Genuino board has to be connected to the Ethernet Shield and also has a USB cable connected to the computer.

Schematics

image developed using Fritzing. For more circuit examples, see the Fritzing project page

Code

The code below is configured for use with an Ethernet shield, which has an onboard SD slot. In the setup(), call SD.begin(), naming pin 4 as the CS pin. This pin varies depending on the make of shield or board you are using.

The code uses some undocumented utility libraries to report information about the SD card. This information includes formatting (FAT16 or FAT32) and file structure, as well as the amount of free space and space used on the card.

SORRY, There is an error at our code repository, please inform to web@arduino.cc

See Also


  • Datalogger - How to log data from three analog sensors to an SD card.
  • DumpFile - How to read a file from the SD card.
  • Files - How to create and destroy an SD card file.
  • Listfiles - How print out the files in a directory on a SD card.
  • ReadWrite - How to read and write data to and from an SD card.


Last revision 2015/08/17 by SM

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