Once the WebDAV server is running on the ESP8266, a WebDAV client like Windows can access the filesystem on the SD card just like a cloud drive. The drive can also be mounted like a networked drive, and allows copying/pasting/deleting files on SD card remotely.

3D Printer

I am using this setup as a networked drive for 3D Printer running Marlin. Following circuit with ESP8266 and MicroSD adapter is fabricated on a PCB. A full size SD card adapter is glued to one end and provides access to all SPI data lines. ESP8266 code avoids accessing micro SD card, when Marlin is reading/writing to it (detected using Chip Select line).

GCode can be directly uploaded from the slicer to this remote drive, thereby simpliying the workflow.

Dependencies:

Use:

Compile and upload the program to an ESP8266 module. ESP12-E was used for development and testing. Connect the SPI bus lines to SD card.

ESP Module	SD Card
GPIO13	MOSI
GPIO12	MISO
GPIO14	SCK
GPIO15	CS

The card should be formatted for Fat16 or Fat32

To access the drive from Windows, type \\esp_hostname_or_ip\DavWWWRoot at the Run prompt, or use Map Network Drive menu in Windows Explorer.