MobileRead Forums - View Single Post - K4 Extending/refreshing screensaver timer?

nimbulan · 02-11-2021, 11:50 AM

I've recently set up and old Kindle 4 (4.1.4) to act as a weather station, which seems to be a fairly common project. I am using the Online Screensaver Extension script (https://www.mobileread.com/forums/sh...d.php?t=236104) with the modifications to allow it function on Kindle 4 found in this post: https://www.mobileread.com/forums/sh...2&postcount=36

This works great...except that it only updates 4 or 5 times before stopping. Using the log file for the script, I was able to track down the problem:

Code:

Thu Feb 11 03:05:09 UTC 2021: wait_for called with 900, now=1613012709, Powerd state: Screen Saver, defer_suspend:0, Remaining time in this state: 53.913745, Battery Level: 58% Battery logging: On
Thu Feb 11 03:20:22 UTC 2021: wait_for called with 900, now=1613013622, Powerd state: Screen Saver, defer_suspend:0, Remaining time in this state: 41.375632, Battery Level: 56% Battery logging: On
Thu Feb 11 03:35:35 UTC 2021: wait_for called with 900, now=1613014534, Powerd state: Screen Saver, defer_suspend:0, Remaining time in this state: 28.618913, Battery Level: 56% Battery logging: On
Thu Feb 11 03:50:47 UTC 2021: wait_for called with 900, now=1613015447, Powerd state: Screen Saver, defer_suspend:0, Remaining time in this state: 15.851457, Battery Level: 56% Battery logging: On
Thu Feb 11 04:06:00 UTC 2021: wait_for called with 900, now=1613016360, Powerd state: Screen Saver, defer_suspend:0, Remaining time in this state: 3.076768, Battery Level: 56% Battery logging: On
Thu Feb 11 04:21:12 UTC 2021: wait_for called with 900, now=1613017272, Powerd state: Ready to suspend, defer_suspend:1, Remaining time in this state: 33.024700, Battery Level: 56% Battery logging: On

From these log entries, you can see that the "remaining time in this state" continues to decrease every time the Kindle wakes up to update the screensaver. Once the power state reaches "ready to suspend" the wifi no longer functions (and I'm not sure the screen can be updated at that point either.)

So I'd like to know if there's a command I can add to the script that would extend the time remaining in the screensaver state, or to refresh it somehow, so the script can continue running indefinitely without needing to keep it plugged in (since I understand that when plugged in, the Kindle will stay in screensaver mode indefinitely.) I am aware that the length of the time the screensaver is active can be modified through the t2_timeout setting, though no matter what value is set it would always be a fixed amount of time (also not sure if there's a maximum value.)

Any suggestions would be appreciated.

02-11-2021, 11:50 AM	#1
nimbulan Junior Member Posts: 3 Karma: 10 Join Date: Feb 2021 Device: Kindle 4	Extending/refreshing screensaver timer? I've recently set up and old Kindle 4 (4.1.4) to act as a weather station, which seems to be a fairly common project. I am using the Online Screensaver Extension script (https://www.mobileread.com/forums/sh...d.php?t=236104) with the modifications to allow it function on Kindle 4 found in this post: https://www.mobileread.com/forums/sh...2&postcount=36 This works great...except that it only updates 4 or 5 times before stopping. Using the log file for the script, I was able to track down the problem: Code: Thu Feb 11 03:05:09 UTC 2021: wait_for called with 900, now=1613012709, Powerd state: Screen Saver, defer_suspend:0, Remaining time in this state: 53.913745, Battery Level: 58% Battery logging: On Thu Feb 11 03:20:22 UTC 2021: wait_for called with 900, now=1613013622, Powerd state: Screen Saver, defer_suspend:0, Remaining time in this state: 41.375632, Battery Level: 56% Battery logging: On Thu Feb 11 03:35:35 UTC 2021: wait_for called with 900, now=1613014534, Powerd state: Screen Saver, defer_suspend:0, Remaining time in this state: 28.618913, Battery Level: 56% Battery logging: On Thu Feb 11 03:50:47 UTC 2021: wait_for called with 900, now=1613015447, Powerd state: Screen Saver, defer_suspend:0, Remaining time in this state: 15.851457, Battery Level: 56% Battery logging: On Thu Feb 11 04:06:00 UTC 2021: wait_for called with 900, now=1613016360, Powerd state: Screen Saver, defer_suspend:0, Remaining time in this state: 3.076768, Battery Level: 56% Battery logging: On Thu Feb 11 04:21:12 UTC 2021: wait_for called with 900, now=1613017272, Powerd state: Ready to suspend, defer_suspend:1, Remaining time in this state: 33.024700, Battery Level: 56% Battery logging: On From these log entries, you can see that the "remaining time in this state" continues to decrease every time the Kindle wakes up to update the screensaver. Once the power state reaches "ready to suspend" the wifi no longer functions (and I'm not sure the screen can be updated at that point either.) So I'd like to know if there's a command I can add to the script that would extend the time remaining in the screensaver state, or to refresh it somehow, so the script can continue running indefinitely without needing to keep it plugged in (since I understand that when plugged in, the Kindle will stay in screensaver mode indefinitely.) I am aware that the length of the time the screensaver is active can be modified through the t2_timeout setting, though no matter what value is set it would always be a fixed amount of time (also not sure if there's a maximum value.) Any suggestions would be appreciated.