'L' - lack of components on the internal board side.

Key Programming...

31327215_ 2x1L15Y

beat me by a few minutes
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add:
But what about the spa platform..
there are a couple of dumps with known pin codes, but their location in the flash is not clear.. does anyone have an understanding of this

21 sec.

5.0.1 only for MEGA2560, control via terminal.
Connect the Kaev library (add lib)
Power on > CEM.
Reads OK. Erase before writing.
R/W to SD card.