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Old 12-19-2019, 02:02 PM   #36
Yorker
Enthusiast
Yorker began at the beginning.
 
Posts: 28
Karma: 10
Join Date: Sep 2019
Device: KPW
Quote:
Originally Posted by knc1 View Post
See:
https://ibb.co/QPhK0BP
Remove LEDs from the board.
The very low voltage of the Kindle's serial port disrupts the current used to drive the LEDs.


You can find that information in Geekmaster's post on building a 5v (or 3.3v) converter to 1.8v


Use "prefix" set to "tools", click "show threads", then find there (second thread on list):
"Serial jailbreaking your fw ..."
https://www.mobileread.com/forums/sh...d.php?t=267541

Thanks for helping me out with the forum searching
It's actually the same thread i mentioned in my previous post and the Geekmaster one is this i think
https://www.mobileread.com/forums/sh...d.php?t=162775

So here is the situation now
Still doesn't work after removing the leds (they are so tiny that i think i lost their pads too) but i did check the voltage is continuing to the cap's and the usb, not sure if it made any difference but it was still unrecognized and the Tx was 3.1 while Rx was 0.020-30
Also didn't work on either linux or windows, the ttyS0 i saw and mentioned earlier on linux is actually there all the time even without anything connected to the machine so i guess it's not related to my serial attempts which means it only picks up USB devices and no serial interfaces :\
https://ibb.co/pvzjxsp

I forgot to mention but i also got a USB TTL Cable so i tried that, was nothing on linux and on Win same situation 3.1 and close to 0 volts on either end.
https://ibb.co/xDWYGMb
https://ibb.co/t3j711C

No idea what is happening or what to do next at this point

I also double checked all connections and my solder points i'm either missing something or my kindle is misbehaving
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