I got this device set up nearly as I like, but then flew too close to the sun while experimenting with setting lock screen wallpaper and enabled a lock screen PIN which was then never accepted.
After a reboot recovery
in adb
, if you hold the top button and press the volume up button, you can get to a menu where you can do a factory reset.
After I did that, I decided to write this down.
The firmware version this has now is: MAS_EPD305_L81B804_T44_V09
.