About SD card

The SD transfer use the GCODE protocol based on M28/M29 commands, this protocol is often broken by external queries or even auto reporting. Additionnaly the SD transfer is very slow: ~0.4KB/s, which make it almost unusable.

So this protocol is no more supported in ESP3D, and feature is provided as it is.

The only existing reliable solution to be used in addition of ESP3D 2.1X, is to use a WiFi SD card like Toshiba FlashAir, which is no more produced.

ESP3D 3.0 has some existing solution and some ongoing plan for better SD support depending on hardware used.