[knc1]

Originally Posted by Evg

Thank you for the guide.
Sorry I was not successful on step 14. Starting Kindle sends a lot of unreadable messages.

SW 5.6.5.
I used RealTerm, SecureCRT Windows, 115200 (and all other baud rates), 8N1, no Flow control, ANSI and VT102 emulation.

I tried MOXA usb to rs232; and direct connection to serial interface. I didn't use TTL Serial Cable 1.8V. Can this be the reason?

Which one?
http://www.moxa.com/doc/specs/UPort_1100_Series.pdf
Not that it probably matters in this case.

Hmm...
This thread has over 8,000 views and no reports that the technical specifications stated are wrong.
Did you have a custom Kindle built for you by someone other than Amazon?

Likely causes of garbled output:

• Poor (or no) ground connection (Kindle is 3-wire serial)
• Poor or lose connections of the Tx and Rx leads to Kindle
• Wrong speed setting (it is 115200 unless you had a custom Kindle built).
• Wrong terminal emulator settings (it is 8N1, no hardware flow control, no software flow control, no conversion of EoL characters - unless you bought a custom Kindle).
• Serial interface voltage incorrect.
  Note this may burn out the Kindle's Rx side.

So first - check your work.
If nothing lose, missing, or set-up wrong, try an adapter with the correct interface voltage.

= = = =

Tech. Note:

• The K1 was reported to be 3v3 interface levels.
• The K2 and DX(G) (large screen K2) may also be 3v3 interface levels.
  Unconfirmed by myself.
• The K3 ... current (2015) KV are 1v8 interface levels.
• The K1, K2 and DX series all used different connection points.
  Only the K1 has a hardware serial port link in the Wiki index.
  The information is missing on the K2 and DX - an oversight I intend to fix when I add serial port connections to the devices I have.
• The K3 used a serial port connection on the lower cover light connector slot.
• The K4 ... current (2015) KV all use the same connector pad layout (when you have a working Gerber macro, why change it? )
  Only the location of the pad layout on the mother board changes with the various models.
• These directions, titled for the KV with a specific firmware are general directions for all models - only the model nickname and firmware version changes.
• O.T: Freescale's previous company name was Motorola.