First thing worth checking is the power supply to the esp32.
I can't count the number of times I have wasted hours chasing weird error messages etc. only to finally realise it is a power problem....


On my board I have few LDOs, one for esp32, one for sd card. Both are present and equal to 3.3V ...

I'm develop custom board with ESP32-D0WD. It uses sd card for loging information. Every time I'm trying to write to sd card i'm getting errors.

Connection between MCU and sd card are same as on lyrat4.3:
SD_CLK -> MTMS (Pin 17)
SD_D2 -> MTDI (Pin 18)
SD_D3 -> MTCK (Pin 20)
SD_CMD -> MTDO (Pin 21 ...