FLsun SR firmware
Be sure to use the latest firmware for your printer type.
FLsun SR
Download the firmware. Put it to the root of an SD card. Insert in to your unit and switch it on. The firmware will automatically install and takes just a few minutes. Do not power off until complete.
V1.4
This is the latest release for the Nano V3.1 motherboard – Update process: first update the printer, then format the SD card and copy only the “DWIN_SET” file before updating the screen.
For earlier version please follow this link to the manufacturer’s firmware section HERE