05-02-2019, 06:51 AM | #1 |
HOOH
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Join Date: Apr 2019
Device: PW3
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Serial jailbreaking help
Hey all. I recently decided to try and serial jailbreak my PW3 running a firmware that's too new to software jailbreak, and I've run into a little snag. Following this thread I got to the point where the PuTTY window shows the boot instructions and such, but I can't seem to interrupt the boot process before it boots normally.
I'm assuming PuTTY is supposed to send my inputs from the keyboard as terminal commands to the serial port, but nothing I press seems to do anything. The connections I'm using are admittedly a little slipshod but I figure if it's showing the terminal on PuTTY it's connected well enough to work, but of course, it doesn't seem to be working 100%, but it makes me think it's something software-related. I'm not at the computer that I've been using to do it right this moment, but I can furnish screenshots/pictures if requested. Many thanks! |
06-03-2019, 02:43 PM | #2 |
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I had the same problem, but i was using minicom(as against putty) within a terminal window on a linux graphical desktop. No matter what I pressed the autoboot couldn't be halted(even though the terminal displayed all key-presses).
By running minicom on one of the text-only TTY sessions, I was finally able to see the effect of key-presses over the serial connection(i.e. stop autoboot, run commands etc ). Hope this helps someone stuck similarly. |
06-17-2019, 07:05 AM | #3 |
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Device: Kindle 3, PW3, PW4(Bricked)
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I've had this happen to me with 2 causes:
One time was just a bad ground connection - especially tricky on the 'tropicalised' gooped pw4. I found I can see the serial output with gnd disconnected but it won't talk in the other direction.. But also - I bought a cheap 1v8 TTL adapter from aliexpress and it doesn't seem to send my keystrokes properly, so I've gone back to my ftdi one with a voltage regulator. Good luck. |
10-27-2020, 06:12 PM | #4 |
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Device: Kobo Libra H20, Kindle PW3, PW2
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I have also the same issue PW3, cheap 1v8 TTL adapter form aliexpress and it seems not to be able to send any commands.
I have this board: https://www.aliexpress.com/item/4000...629e11c1YE1P96 is it the one that caused trouble too for you @SenorClean? Do I have any chance to verify that I am able to send keys in general? |
10-27-2020, 06:23 PM | #5 | |
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Device: Kindle 3, PW3, PW4(Bricked)
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Quote:
They do seem to be a bit fickle, might be worth trying another if you can find one. |
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10-28-2020, 02:46 AM | #6 | |||
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Device: Kobo Libra H20, Kindle PW3, PW2
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Quote:
Quote:
Quote:
But the ground is at least somehow working: if I remove it completely I can't read anything with minicom. Having it sticked as shown in the picture, finally let me at least 'read' the console. |
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10-28-2020, 01:03 PM | #7 |
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Device: Kobo Libra H20, Kindle PW3, PW2
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I've just done the job again on another PW3 which is already jailbroken (back where it was possible with 5.9.6 on it).
It is a little easier to fiddle with, since I can connect to the kindle on SSH via USbNET ... and get the serial-debug port output simultaniously via the TTL board mentioned above. So I'm ready and connected, can quickly reboot the device via SSH and trace the RX/TX traffic with minicom. But still I am unable to send keys ... any hope or tests that I can do from the working SSH shell? ...otherwise I must assume that the TTL adapter is the problem. |
11-05-2020, 02:30 PM | #8 |
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Device: Kobo Libra H20, Kindle PW3, PW2
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Just wanted to share that the mentioned board works: and finally I got my PW3 jailbreaked.
Some thoughts on it:
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