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arduino-esp32/libraries/SD
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vortigont 34125cee1d
Examples update, add a note for configTime() that only one ntp server is supported by lwip (#5343) 
lwip lib bundled with esp32 Arduino supports only one ntp server. Any additional servers set are just silently ignored.
This default is different from esp8266 Arduino core and very confusing. Most of the examples provided uses 3 different ntp servers for redundancy while only the first one is used actually.
Addressing issue #4964
2021-07-22 20:09:28 +03:00
..
examples Examples update, add a note for configTime() that only one ntp server is supported by lwip (#5343) 2021-07-22 20:09:28 +03:00
src Fixes SD begin() end() memory leak #2897 (#5419) 2021-07-19 19:08:51 +03:00
library.properties Bump library versions to 2.0.0 (#5182) 2021-05-18 14:00:49 +03:00
README.md SD library explanation (#262) 2017-03-14 14:53:59 +01:00

README.md

SD library

This library provides the integration of ESP32 and SD (Secure Digital) cards without additional modules.

Sample wiring diagram:

SD card pins

For others SD formats:

Other SD card formats

Image source: Wikipedia

- Warning: Some ESP32 modules have different pinouts!

FAQ:

Do I need any additional modules, like Arduino SD module?

No, just wire your SD card directly to ESP32.

What is the difference between SD and SD_MMC libraries?

SD runs on SPI, and SD_MMC uses the SDMMC hardware bus on the ESP32.

Can I change the CS pin?

Yes, just use: SD.begin(CSpin)