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Ok, i was too impatient, i did a bit of reverse engineering on your code. ;-)
I found the version, and the crc positions ; i was able to alter an image to make it validate with your tool, and it's also recognized by my device. I'm too afraid, though, to try a real update.
Do anybody know if there's some kind of jtag or other hardware way to repair the device if it "bricks" on an invalid update (or if an update is broken and don't provide a valid way to install another update) ?
The hardware seems pretty simple to disassemble as far as i tried, but i have really few electronics skills...
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