Flashing the (tru)SDX firmware using Linux
Date: September 27, 2022
Download the latest firmware from here.
# avrdude -v -p atmega328p -c arduino -P /dev/ttyUSB0 -b 115200 -D -U flash:w:DM5TT_truSDX-beta_xxx_Firmware.hex
Warning: Have an AVRISP around to unbrick the bootloader if something bad happens during the process.