SPI and SD .begin methods - no parameters?

sivar2311 · May 16, 2025, 5:55am

There still seems to be an unresolved issue.
Please see:

github.com/espressif/arduino-esp32

SD cards not mounting

opened 03:20PM - 12 Jan 23 UTC

closed 02:34PM - 09 Jan 25 UTC

tomsmilton

Status: Awaiting triage Area: Libraries

### Board ESP32 Dev Board ### Device Description ESP32 Dev kit. Micro SD ca…rd breakout board (3.3V). ### Hardware Configuration GPIO 5 connected to CS GPIO 23 connected to MOSI GPIO 18 connected to CLK GPIO 19 connected to MISO ### Version v2.0.6 ### IDE Name PlatformIO (VS Code) ### Operating System Ubuntu ### Flash frequency 40Mhz ### PSRAM enabled no ### Upload speed 921600 ### Description _Most_ SD cards will not connect. The sketch compiles and runs, but when trying to mount SD cards produces an error. Using the SD library communicating by SPI _most_ SD cards do not mount. I have five identical (same size, type, brand etc.) micro SD cards, one of them always connects and runs perfectly. The other four do not mount at all. They all mount to my computer and have all been formatted as FAT32. I have tried directly wiring up the SD cards and I get the same behaviour (four don't work and one does). I have tried powering off a power supply to ensure that isn't the issue but the behaviour remains the same. The error message that I get is: `ff_sd_initialize(): APP_OP_COND failed: 1` This is different to the error that I get when the SD cards are not connected which is: `ff_sd_initialize(): GO_IDLE_STATE failed` ### Sketch ```cpp #include "FS.h" #include "SD.h" #include "SPI.h" void setup() { Serial.begin(115200); } void loop() { if (!SD.begin()) { Serial.println("Card Mount Failed"); } else { Serial.println("Worked"); } delay(2000); } ``` ### Debug Message ```plain [ 72613][W][sd_diskio.cpp:550] ff_sd_initialize(): APP_OP_COND failed: 1 [ 72613][E][sd_diskio.cpp:805] sdcard_mount(): f_mount failed: (3) The physical drive cannot work ``` ### Other Steps to Reproduce I have also reproduced this soldering the pins of a micro SD card adaptor to the ESP32 with the correct pull-ups. The behaviour is identical. I have tried two different dev boards and the behaviour persists. ### I have checked existing issues, online documentation and the Troubleshooting Guide - [X] I confirm I have checked existing issues, online documentation and Troubleshooting guide.

Some SD cards work, some do not.