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Old 10-09-2021, 06:05 PM   #5
katadelos
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Posts: 219
Karma: 3333683
Join Date: Nov 2019
Location: United Kingdom
Device: K5, KT, KT2, KT3, KT4, KV, PW2, PW3, PW4, PW5
Cool project!

Quote:
Originally Posted by wishindo View Post
Drivers could be a problem though, I don't know how Linux handles cellular modems - whether it's one universal driver per interface or if they're device specific.
I've noticed that many USB/PCI-e 3G modules use the "option" kernel module (which tends to be included on both 3G/WiFi only Kindle variants. No idea about 4G modules but you might struggle to find one which has a kernel module available for the ancient kernel version used on the K3.

Quote:
Originally Posted by wishindo View Post
Also, I've come up with an alternative scheme - replace the 3G modem with a USB flash drive for extra storage (4GB is tiny nowadays) using a mini-PCIe to USB 2.0 adapter/riser like in this picture. Though how exactly would it be mounted in the filesystem is unknown to me currently.
This could present a problems - looks like the USB port on that card is surface mounted so you probably won't be able to replace the back of the case of the Kindle without cutting a hole? Using a Mini-PCIe to SD adapter might be a better option. The hardware should be detected automatically and you should be able manually mount it over SSH if it's ext3 formatted (Kindles lack support for ext4 and quite a few ext3 features).

Shouldn't be massively difficult to adapt the upstart userstore scripts to present the storage over USB mass storage mode assuming that things work in the first place -this wiki page is a good overview of the method used to achieve this on pre-PW4 Kindles.

Quote:
Originally Posted by Quoth View Post
... and also expiring certs are an HTTPS issue.
It's likely that this issue could be worked around by extracting the cert bundle and/or keystore from a more recent device and transplanting it to the older device - I've not got round to trying this on one of my older Kindles yet though.
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