Struggling with the MicroSD card breakout board+ and an ESP3

[nicholmikey]

I am wondering has anyone had success making the SD card breakout work with an ESP32. I am using the wiring and code here https://randomnerdtutorials.com/esp32-m ... d-arduino/ but I supplied 5v instead of 3.3, with 3.3v signals coming from the ESP32. This is the board I am using https://cdn.sparkfun.com/assets/learn_t ... lusV20.pdf I have tried in the arduino IDE and platformio in vs code, with the built in examples and the example posted above, I have also tried several different pins for CS while passing them to SD.begin(). I have also tried adding a 10k pull up on CS.

All I can get is

Code: Select all

[E][sd_diskio.cpp:123] sdSelectCard(): Select Failed
[E][sd_diskio.cpp:775] sdcard_mount(): f_mount failed: (3) The physical drive cannot work
[E][sd_diskio.cpp:123] sdSelectCard(): Select Failed
Card Mount Failed

I have looked over the wiring a million times I am pretty confident it is correct. I have also tried several SD cards that I have formatted using this tool https://www.sdcard.org/downloads/formatter/ . I do see the LED on the SD reader flash when the setup runs. I have done a continuity check on all of the wiring.

The fixes I found found online are adding the pullup and supplying 5v rather than 3.3. Does anyone have other ideas to try?

Thank you in advance.

wiring

PXL_20220121_054249796-small.jpg (353.78 KiB) Viewed 595 times

[mikeysklar]

Everything needs to be 3v3 with the esp32 board you are using. Our Micro-SD board works fine with 3v3. Don't use 5v.

[nicholmikey]

I changed it to use 3.3v supply rather than 5v and that does seem to clear the chip select errors, but I'm still left with

Code: Select all

f_mount failed: (3) The physical drive cannot work

This is coming up for all cards of cards including https://www.adafruit.com/product/5252 I am formatting with the windows tool and trying the official SD card formatter. No dice so far.

I'll keep trying things, but if someone stumbles upon this I would love more ideas.

[nicholmikey]

I have solved the issues, it was my misunderstanding of the pinout on this thing plus board, the pins in the tutorial are not correct for this use, if I use the pins as they are written on the board it works. So 19 for MISO, 18 for MOSI, and so on.