1. Please, provide information, how you damage Kindle.
2. Sorry I have no information about Arduino and estick (what is it?). I have checked adapters based on FT232RL or PL2303 chips.
3. Serial line needed to access to recovery menu in linux terminal. It have special option "3. Export MMC0 over USB" so you can import over USB in other Linux machine and restore rootfs from backup.
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