Serial JB of PW3 (G090G1)

[gripped]

I've just received a PW3 (G090G1) today and it's on FW 5.9.7 so I gather that the only way to JB is to gain serial access.

I have looked around the site and after seeing this post decided I would attempt the method with pins (partly) detailed here.
https://www.mobileread.com/forums/sh...65#post3739965

I've ordered the FT232RL-FTDI-USB-3-3V-5-5V-to-TTL-Serial-Adapter-Module-for-Arduino-Mini-Port it mentions, various cables, pins, clips and connectors for just over £10 and one of these https://www.ebay.co.uk/itm/AMS1117-1...72.m2749.l2649

Some of the instructions I've found seem to mention only connecting to the 3 serial pins, namely here
https://www.mobileread.com/forums/sh...90&postcount=1
Is this because the TTL-232RG-VREG1V8-WE USB TTL Serial Cable supply's it's own power from the USB ?

And in other instructions
https://www.mobileread.com/forums/sh...07&postcount=2
a fourth wire connect from TP1706 to V and a ground other than the next to RX & TX on the serial pinouts is used.

I've read elsewhere that TP1706 supplies 1.8v so do I even need the AMS1117.


Or is it the case that with the FT232RL I bought the power is going to come from the USB cable And I just need to 'step it down' with the same wiring as shown in the first post I mentioned

A tad confused. Sorry if this is a dumb post but I'm willing to give it a go but not an electronics expert !

Actually writing this has got things clearer in my head I think ?
I think I can ignore TP1706 ?

Posting anyway in case anyone has advice or can tell me where I'm horribly wrong. It will be a good few days until the parts arrive

[gustavonow]

I am as confused as you are, also planning to use a 3.3v board with a step-down board, but I can't seem to find out if you need to connect 3 wires or 4 wires.
If you do get an answer please let me know.

[knc1]

Originally Posted by gripped

- - - - -
Some of the instructions I've found seem to mention only connecting to the 3 serial pins, namely here
https://www.mobileread.com/forums/sh...90&postcount=1
Is this because the TTL-232RG-VREG1V8-WE USB TTL Serial Cable supply's it's own power from the USB ?

And in other instructions
https://www.mobileread.com/forums/sh...07&postcount=2
a fourth wire connect from TP1706 to V and a ground other than the next to RX & TX on the serial pinouts is used.
. . . .
A tad confused. Sorry if this is a dumb post but I'm willing to give it a go but not an electronics expert !

. . . . .

Originally Posted by gustavonow

I am as confused as you are, also planning to use a 3.3v board with a step-down board, but I can't seem to find out if you need to connect 3 wires or 4 wires.
If you do get an answer please let me know.

It all depends on the USB to serial converter that you use.


DO NOT mix and match the directions from threads that use different parts, at least not unless you read carefully and do not let your eyes/mind just skip over words you don't recognize the usage of.


TP1706, External reference battery, the fourth wire - -
Read the data sheet giving the technical description of the USB to serial converter YOU ARE USING (ignore all / everything about any converter you ARE NOT USING).
Does it say that you can set the (serial) output voltage by applying a corresponding REFERENCE voltage?
Yes - that is what the 4th wire is used for, to supply a reference level to the serial output stage of the converter.


If no mention of being able to set the serial output voltage of the converter - then most likely it is not possible set it with an external reference (it would say so if it supported that feature).
No mention == no TP1706, or external reference battery, no fourth wire needed to pass a reference signal that neither exists or can be used.


If you are reading one of my threads / series of posts about using the Kindle serial port - each of which I wrote ARE COMPLETE in and of themselves. You don't have to go outside of what I wrote. If a 4th wire is needed for the part (identified by part number almost always with the data sheet attached to the post) I mention, then the connection choices for the 4th wire is included.
If a 4th wire is not needed, then I only write about and document 3 wires.
I do not mix documentation on using a 4 wire convertor and then only describe 3 of the 4 wire connections.


- - - - -


How to do this serial port connection - -
1) Pick the post(s) and or thread you are going to follow.
(Use the Master Index (the: "Where do I start" sticky) to look up things written here about serial port use.)
2) Get the EXACT (no substitutions allowed) part(s) described.
3) Use them EXACTLY like described.
Find that you have zero unanswered questions and zero problems.


Start substituting parts, then you have to start substituting words in the directions until the part(s) and the words match up once again.
But you only have your self to question, your the one that got off the described path to success.

[gripped]

Originally Posted by knc1

It all depends on the USB to serial converter that you use.


Start substituting parts, then you have to start substituting words in the directions until the part(s) and the words match up once again.
But you only have your self to question, your the one that got off the described path to success.

Thanks for your reply. Very helpful. As I alluded to at the end of my first post I think I figured it out in the end. I know in my head exactly what needs connecting to what. I have substituted parts to keep costs down but am aware that if I brick it I have increased my costs substantially

Typically everything I ordered arrived in good time except for one thing so I am delaying trying this until the last part does arrive.

If it goes wrong all blame is on me.

If it works I'll post some details here.

[EuGras]

I have successfully connected to Kindle using chinese clone of FT232RL-FTDI-USB.
USB adapter has been changed with LDO Voltage Regulator 1.8V according video https://www.youtube.com/watch?v=G4PwWHz65Z0.
I used three wires (tx, rx and ground) to connect to the book.

[gripped]

Managed to Get my PW3 jailbreaked

Excuse the shoddy soldering

Gnd on FT232RL to GND on AMS1117
5v on FT232RL to Vin AMS1117
Vout on AMS1117 to central pin on the voltage jumper on the FT232RL

I had to apply slight pressure to the sewing pins to get a connection.

Followed the linux instructions for the serial JB. There was no 'diag' menu. Just a diag prompt but

exit login

got me to a login .

Very happy to have got this done. Out of my comfort zone

[gripped]

Originally Posted by EuGras

I have successfully connected to Kindle using chinese clone of FT232RL-FTDI-USB.
USB adapter has been changed with LDO Voltage Regulator 1.8V according video https://www.youtube.com/watch?v=G4PwWHz65Z0.
I used three wires (tx, rx and ground) to connect to the book.

Thanks for sharing. You helped me with my confidence and with the idea the superglue the AMS1117

[knc1]

Originally Posted by gripped

Thanks for your reply. Very helpful.

- - - - -

Thank you.


Sometimes my reply(ies) are helpful, sometimes I just screw-up every word that I type, leaving the reader worse off than before they read my answer.
I guess both of us got lucky this time.