ESP32 Forum

Hi

I want to use a SDCARD in MMC mode with Arduino framework (SD_MMC library) with only for 1 bit data width.

The sdcard conexion is according https://github.com/espressif/esp-idf/tr ... ge/sd_card

My question:

Can I use GPIO4 (D1), GPIO12(D2) and GPIO13(D3) as regular IO pins in 1-line SD mode?

BR
Gilberto

Hi!
check
arduino-esp32/libraries/SD/examples/SD_Test/SD_Test.ino
and arduino-esp32/libraries/SD_MMC/examples/SDMMC_Test/SDMMC_Test.ino for pinout
Your pins used in SDMMC, not used in SD mode