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Topic: Reading MicroSd Card, lots of problems (Read 1 time) previous topic - next topic


so i have an arduino pro mini 3.3 V and i bought https://www.adafruit.com/products/254

i wired everything good... i tested one old card which is 2gb and it did not work..i put my cellphone 32 gb card and it worked initialize and read all the files...

I bought a new card because i am not going to use my cellphone card...it was a patriot class 4 8gb Microsd HC...

it did not work .. so i starting tweaking the formating of the card and i got it to initialize but it did not recognized the Fat16/32...

SO... i tested again my cellphone card...

and same problem it was not detecting fat 16 and 32 error...

i have changed the speed of the spi to FULL and HALF and it is not working..

i have tried putting the CS pin10 on high after assigning the pin to write and it is not making a diference either..

i wonder if there is a list of cards that are compatible with arduino..

could you help me out here please..

visit www.diveduino.com


How did you format the card?

The best way is to use SD Formatter https://www.sdcard.org/downloads/formatter_3/.

You can also use the SdFormatter sketch in the SdFat examples folder http://code.google.com/p/sdfatlib/downloads/list.

If you use Mac, Linux, or Windows OS utilities you may format the SD with a GUID Partition Table (GPT).  These OSes and many phones work with GPT but it is not a valid standard SD format.  Only MBR partition tables are recognized by SD.h and SdFat.



i will try to format it with the scketcht and let you know..
visit www.diveduino.com


Now i can confirm that the MicroSD card breakout board..from adafruit does not work with arduino pro mini 3.3v at 8 mhz...

just conected the breakout board to an arduino UNO  and it worked...

any ideas why it would not work in the promini... maybe because the board has a lvl shifter to convert 5 v to 3.3?
visit www.diveduino.com


is now working... just make sure to power it properly
visit www.diveduino.com

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