I have tried three SD modules (cheap Chinese no name) two with six pins and one with a 7th 3.3V pin. None of the examples in the SD library can initialize any of the modules and report "Initialization failed!" which is the condition SD.begin(4) == 0. I have checked the wiring connections to the Me…

Have you tried them on an UNO to confirm they work okay? On the Mega the SPI pins are different... MISO = pin 50 MOSI = pin 51 SCK = pin 52 CS = pin 53

SD Card module - fails to work with Mega

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protovtol November 15, 2021, 7:30am 3

WOW! Pins 50 thru 53 worked. Thanks muchly.

I had seen that somewhere but had completely forgotten about it. Thanks for the reminder!

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SD Card module - fails to work with Mega

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