BigTreeTech SD Cloud V1.0 - WIFI SD Card Reader
BTT SD Cloud V1.0 was created by the 3D printing team at ShenZhen BigTree Technology CO., LTD. put on the market,
This is a module for wireless file transfer between your computer and the 3D printer, so that you don't have to fiddle around with the SD card.
The module uses ESP 12S which is based on ESP8266's low power UART WIFI chip module
The main frequency supports 80MHz and 160MHz
Spectrum range: 2412 - 2484 MHz
Logic voltage: DC 3.3V
USB input voltage: DC 5V
Size: SD 24mm x 58.3mm
Only file names that consist of ASCII code are supported.
More information, firmware and instructions are available here