ESP32 Forum

Posted: **Thu Nov 12, 2020 11:31 pm**

Hello, I am trying to setup SD CARD on ESP32 DevKit V1 board using esp-idf for some time but without success.

When I use Arduino IDE, the card works without issues (SD_Test example sketch).

When using esp-idf example sd_card, i get the following error message:

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I (347) example: Initializing SD card
I (347) example: Using SPI peripheral
I (357) gpio: GPIO[5]| InputEn: 0| OutputEn: 1| OpenDrain: 0| Pullup: 0| Pulldown: 0| Intr:0 
I (407) sdspi_transaction: cmd=5, R1 response: command not supported
E (427) sdmmc_common: sdmmc_init_ocr: send_op_cond (1) returned 0x107
E (427) vfs_fat_sdmmc: sdmmc_card_init failed (0x107).
I (427) gpio: GPIO[5]| InputEn: 1| OutputEn: 0| OpenDrain: 0| Pullup: 0| Pulldown: 0| Intr:0 
E (437) example: Failed to initialize the card (ESP_ERR_TIMEOUT). Make sure SD card lines have pull-up resistors in place.

I have set the define:

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USE_SPI_MODE

and configured pins as following.

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#define PIN_NUM_MISO 19
#define PIN_NUM_MOSI 23
#define PIN_NUM_CLK  18
#define PIN_NUM_CS   5

Can someone help me out with this please?

This image shows how I connected the shield:

: Setup image (1); 20201113_000600.jpg (2.37 MiB) Viewed 21004 times

: Setup image (2); 20201113_000327.jpg (2.02 MiB) Viewed 21004 times

Posted: **Fri Nov 13, 2020 4:49 pm**

Try a really, really slow SPI speed. Like 1MHz. This will help show that the issue is not hardware.

Posted: **Fri Nov 13, 2020 7:27 pm**

This is 5V SD card adapter.

Posted: **Sat Nov 14, 2020 9:08 pm**

Try a really, really slow SPI speed. Like 1MHz. This will help show that the issue is not hardware.

Thanks! Once I decreased frequency it started working. I get max write speed (1024 to 4096 bytes chunks) at 41KBps. This seams low, any hints on how to improve?

This is 5V SD card adapter.

It seams that this is not the issue.

Posted: **Sat Nov 14, 2020 10:23 pm**

This is 5V SD card adapter.

lol, that would do it!
He says that this works under arduino. Why do you think that the switch of OS helps/hinders? Random life stuff?

Posted: **Wed Dec 09, 2020 12:11 am**

Try a really, really slow SPI speed. Like 1MHz. This will help show that the issue is not hardware.
Thanks! Once I decreased frequency it started working. I get max write speed (1024 to 4096 bytes chunks) at 41KBps. This seams low, any hints on how to improve?

This is 5V SD card adapter.
It seams that this is not the issue.

I have an issue with robustness of this solution to sometimes fail mounting or writing to the card. I solved this by reducing as much as possible wires between esp32 and SD module and so far have not experienced issues.

Posted: **Wed Dec 09, 2020 12:48 am**

Tell me that you have checked the 3V / 5V comment?
That's an easy datasheet check.
You can get voltage level issues to 'work' when reducing MHz but you don't/should not use empirical results ahead of something as simple as a datasheet check (I'm not doing that check for you).
41Kbps is stupidly slow.
I have run SD on ESP at 4MHz using dupont held on with sticky tape & positive thinking ...

Posted: **Thu Dec 10, 2020 8:48 pm**

Tell me that you have checked the 3V / 5V comment?
That's an easy datasheet check.
You can get voltage level issues to 'work' when reducing MHz but you don't/should not use empirical results ahead of something as simple as a datasheet check (I'm not doing that check for you).
41Kbps is stupidly slow.
I have run SD on ESP at 4MHz using dupont held on with sticky tape & positive thinking ...

I did check and I am not sure - http://datalogger.pbworks.com/w/file/fe ... asheet.pdf:

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Power supply is 4.5V ~ 5.5V, 3.3V voltage regulator circuit board

Posted: **Wed Dec 23, 2020 4:32 pm**

Well the datasheet says that it has a level convertor but does not show you how to use 3.3V.
I would hunt for a tutorial.

If you run 5V into an ESP pin then the ESP won't love you for long.

Posted: **Sat Dec 26, 2020 3:28 pm**

The reason i mentioned about 5V for this sd card module is because i am using exactly the same module and it was the issue i had with it. I found the same answer on arduino-esp32 github. Im not saying it is/was the issue in your case, but i thought its worth to mention.
This module is using AMS1117 which characteristics says that Vin >= Vout + 1,5V.

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