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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system Closed May 14, 2022, 7:30am 4

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SD Card module - fails to work with Mega

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