ESP32 Forum

Hello,
I am making a small board with the ESP32 WROOM at its heart. I have connected most of my pins, but have noticed that there are a hand-full of pins going unused. CLK, CMD, SD0, SD1, SD2, and SD3. I have yet to see a wiring diagram using those pins to interface with an SD card.

Thanks

Those pins are not unused, they are connected to the flash chip. And those designations SD_ are for using esp32 as an sdio slave. HS1_ and HS2_ pins are for sdio master. But HS1 conflicts with flash chip pins and so far is not usable.

Thank you!