MobileRead Forums - View Single Post - Tools Serial Jailbreaking your fw >= 5.6.x Kindle for Dummies

pseudosphere · 07-30-2022, 09:04 AM

I just got a "new" second-hand KT3 to play with, and while I was de-registering/re-registering and setting it up, it downloaded the updated firmware ("Update Your Kindle" went from grayed out to visible), and then it auto-installed 5.14.3.0.1 on reboot. The only thing I really want is to be able to disable the screen timeout so I can use it as a display for a small web-app I wrote that works and auto-refreshes in the built-in browser. Unfortunately, this is not possible on the latest firmware even with "~ds".

I actually have an old computer with a serial port header on the motherboard. I couldn't find a serial port module to connect to it, but if I wire the pin-outs on the motherboard to the correct spots on the KT3, I should be able to do a serial flash without needing to acquire a USB-to-Serial or BT-to-Serial adapter, right (obviously this will be easier if I can find a module to plug into the motherboard so that I can more easily access the individual pins/lines)? After I get it wired up, I should just establish a connection to the appropriate COM port as in Part 3, and I can proceed to downgrade to an older firmware and/or jailbreak? Thanks!

07-30-2022, 09:04 AM	#554
pseudosphere Junior Member Posts: 3 Karma: 10 Join Date: Jul 2022 Device: KT3	I just got a "new" second-hand KT3 to play with, and while I was de-registering/re-registering and setting it up, it downloaded the updated firmware ("Update Your Kindle" went from grayed out to visible), and then it auto-installed 5.14.3.0.1 on reboot. The only thing I really want is to be able to disable the screen timeout so I can use it as a display for a small web-app I wrote that works and auto-refreshes in the built-in browser. Unfortunately, this is not possible on the latest firmware even with "~ds". I actually have an old computer with a serial port header on the motherboard. I couldn't find a serial port module to connect to it, but if I wire the pin-outs on the motherboard to the correct spots on the KT3, I should be able to do a serial flash without needing to acquire a USB-to-Serial or BT-to-Serial adapter, right (obviously this will be easier if I can find a module to plug into the motherboard so that I can more easily access the individual pins/lines)? After I get it wired up, I should just establish a connection to the appropriate COM port as in Part 3, and I can proceed to downgrade to an older firmware and/or jailbreak? Thanks!