ESP32 Forum

I have designed a custom board using ESP32-WROOM-32U-N4. However, I'm encountering an issue when manually resetting the board after flashing the code. The code flashes successfully, and sometimes the board resets automatically after the flash is complete and works fine. However, when I press the reset button, it throws the following error on the serial monitor:

rst:0x10 (RTCWDT_RTC_RESET),boot:0x12 (SPI_FAST_FLASH_BOOT)
flash read err, 1000
ets_main.c 371

I appreciate your contribution to my project.

You're using SD0 and SD1 as GPIOs (as in you connected something I2C to it?). Flash is connected to those pins, you cannot use it for anything else. Likely, if you cut those connections, the issue will go away.