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Old 01-08-2024, 11:27 AM   #1
Perozzi
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Join Date: Jan 2024
Device: Kindle Voyage
K4 as an offline digital photo frame

I have a jailbroken K4.

I would like to have the K4 to act as a digital frame, that autonomously changes the picture it shows after some time passes, e.g., every 30 minutes.

I'm trying an approach based on the screen saver hack.
I have put several images on the K4 and every time I turn it off it shows the next image from the pool.
Now I need to set the K4 to periodically turn on and off to change the screen image. Do you think is it possible?

I searched for a clear answer here and on other websites but I can't find one.

In the case it is not possible, do you think there are other approaches that I can follow to reach my goal?

I would like to find a solution self contained on the device, not using wifi as it will be deployed in a place where it is not possible to connect it to wifi.

For example, can a python script running on the K4 trigger the display of an image saved on the device?

Any hint, suggestion, or link is very welcome.
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Old 03-05-2024, 10:05 AM   #2
Perozzi
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Posts: 3
Karma: 5094
Join Date: Jan 2024
Device: Kindle Voyage
Done!

I implemented what I was looking for!

I started connecting various pieces of information I found on this forum, the wiki, and GitHub.

It took some time to JB and get wifi SSH access, then I wrote a few short scripts to get the behavior I was looking for, and I used FBInk to show the images.

NiLuJe's FBInk is the key element to make it work fine, as it allows to show almost any image I drop in the Kindle's storage without having to preprocess it. Thank you NiLuJe!!!

I'm sharing all the details in this GitHub repo: https://github.com/aesuli/Kindle-Photo-Frame
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