Catalex MicroSD Card Reader Issues

Using Arduino Storage
1

Hello,

I am attempting to use a Catalex MicroSD Card Adapter (V1.0 09/02/20133), and am having issues with SD card initialization. I have tried different microSD cards, reformatted, and different Catalex adapters (same version).

I have also tried the solutions found in this thread, including jumping the appropriate wire.

Any ideas on what is wrong/how I can resolve the issue? Pin layout is correct.

Using a generic brand nano.

Thank you!

2

https://forum.arduino.cc/index.php?topic=360325.0

3 
chipSelect = 10

void setup ()
   pinMode(chipSelect, OUTPUT);

some example programs do not do that pinMode... and they work. in my experience, it cost nothing, hurts nothing, and the SD card works if you use it.

4

I believe I found the issue, although I'm not sure what to make of it...

Using an Arduino Uno, I am able to communicate with and execute tasks on the MicroSD Adapter. However, the adapter does not work on the Nano.

Any ideas on what the cause of this discrepancy is?

5

maybe something here can help:

why an uno works when a micro does not

different platform with physical similarities

6

I found the solution for this probem.

The MISO pin (7) of card need a pul-up resistor (10k~100k) when there is no pull-up in the microcontroller.
However, in this case, the Catalex has a buffer between microSd Card socket and the microcontroller pin.
The solution is put the pull-up close to the socket.

See the picture with the solution that I made.

7

lepoloni could you please attach the picture/photo for catalex mod that you have inserted (image is not clear)...
I hope this will help in my SPI multiple connections.....!!

8

beetlenut:
lepoloni could you please attach the picture/photo for catalex mod that you have inserted (image is not clear)...
I hope this will help in my SPI multiple connections.....!!

READ ---> I cannot find the datasheet for Catalex MicroSD Card Adapter - Storage - Arduino Forum