Tried more ordinary Samsung 32GB MicroSDHC and got exactly the same output as for 128GB. This most likely a problem with either the reader or wiring, otherwise I cannot explain it.

Do you have any idea what could be the cause? I do not know if this is a HW issue, or something I should change in the program...?

Thank you for the response. I used host.flags = SDMMC_HOST_FLAG_1BIT; Output is following: ␛[0;32mI (609) example: Initializing SD card␛[0m D (609) sdmmc_periph: peripheral version 5342270a, hardware config 03c44c83␛[0m V (609) intr_alloc: esp_intr_alloc_intrstatus (cpu 0): checking args␛[0m V (619)...

Now I am lost completely. I measured the current levels on the sd card reader, the resistivity of resistors on the board, I even tried my own 10k resistors as pull-ups but nothing helped :( Where should I start looking, before the other reader arrives? I tried 3 different sd-cards also. Should I try...

Out of curiosity I also tried the SDMMC_HOST_FLAG_1BIT and it did not work either. I suspect there is some problem with the reader itself, I'll try the arduino one instead and will post here if I had more luck there, even though this reader works in SPI mode only. Thank you for your answer!

Hi, on a second attempt I disconnected GPIO12 during startup and connected it back just before the sample routine is executed. Now my ESP32 starts, but it gives me another error: ␛[0;32mI (23324) example: Initializing SD card␛[0m ␛[0;31mE (23344) sdmmc_cmd: sdmmc_card_init: send_scr returned 0x109␛[...

Hello, I am trying to connect a doit ESP32 DevKit v1 to an SD Card Reader. I am currently trying this one: https://m.banggood.com/3_3V5V-Micro-SD-TF-Card-Reader-SPI-SDIO-Dual-Module-Board-For-Arduino-p-1064192.html. What I did is I connected the module according to mapping in the ESP32 sd card examp...