Rctimer SD Logger is an open source data logger, simple to use, simple to change, we wanted to create a serial logger that just worked. Power up this advice and it will start logging any received serial data at 9600bps. Sending Ctrl+z three times will drop out of logging and in to command mode.

"new" will create a new file, "md" makes a directory. "?" brings up the list of commands. SD Logger doesn't do a lot, but it does log serial streams extremely well.

Supports FAT and FAT32 file system.
Supports 2.4Kbps to 115Kbps
Supports SDHC SD card(Up to 16GB)
Simple command interface(Sending Ctrl+z three times will drop out of logging and in to command mode.)
Eidt config.txt file from a computer to change baud rate and other system settings(please correct the baud rate if the record file can't be read)
Default baud rate s 9.6Kbps
Input voltage from 3.3V to 12V
Size: 4x5x19mm

Log all your flights on a SD Card. Loaded with the special OpenLog Blackbox firmware.
•Opensoure hardware and software:
https://github.com/cleanflight/blackbox-firmware
•Supports most of the MicroSD card
•On board FTDI port for upgarde firmware
•Supprots Cleanflight
•Interactive log viewer：
https://github.com/cleanflight/blackbox-log-viewer