Datasheet

Using the SD Card

The other half of the adalogger FeatherWing is the SD card. The SD card is how we store long term data. While the

Feather may have a permanent EEPROM storage, its only a couple hundred bytes - tiny compared to a 2 gig SD card.

SD cards are so cheap and easy to get, its an obvious choice for long term storage so we use them for the 'Wing!

The FeatherWing kit doesn't come with an SD card but we carry one in the shop that is guaranteed to work. Pretty

much any SD card should work but be aware that some cheap cards are 'fakes' and can cause headaches.

You'll also need a way to read and write from the SD card. Sometimes you can use your camera and MP3 player -

when its plugged in you will be able to see it as a disk. Or you may need an SD card reader. The Wing doesnt have the

ability to display the SD card as a 'hard disk' like some MP3 players or games, the Feather does not have the hardware

for that, so you will need an external reader!

Formatting under Windows/Mac

If you bought an SD card, chances are it's already pre-formatted with a FAT filesystem. However you may have

problems with how the factory formats the card, or if it's an old card it needs to be reformatted. The Arduino SD library

we use supports both FAT16 and FAT32 filesystems. If you have a very small SD card, say 8-32 Megabytes you might

find it is formatted FAT12 which isnt supported. You'll have to reformat these card. Either way, its always good idea to

format the card before using, even if its new! Note that formatting will erase the card so save anything you want first

4GB Blank SD/MicroSD Memory Card

PRODUCT ID: 102

https://adafru.it/eZR

$7.95

IN STOCK

USB MicroSD Card Reader/Writer - microSD / microSDHC /

microSDXC

PRODUCT ID: 939

https://adafru.it/ree

$5.95

IN STOCK

We strongly recommend you use the official SD card formatter utility - written by the SD association it solves

many problems that come with bad formatting!