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Old 12-09-2011, 06:15 AM   #1
karl_k
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Auto-Wake-on-time ?

Hi all !

I have calibre download news from a local newspaper every night. Its running on my server which is always on.

I understand that i can wake the kindle and pull the newspaper on my kindle via the calibre webserver.

I wonder if this could be automated. i.e. The standby/off kindle wakes at 5:30 am and fetches the newspaper via wifi from the server, then goes back to standby.

Is "wake on time" possible in the kindles ?

Thanks,
Cheers,
Karl
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Old 12-09-2011, 07:42 AM   #2
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Thats easy. Simply edit cron to execute at certain time shell script which will simulate power button/slider press.

Another way is to create same shell script with endless loop and 24 hour delay between simulating key press.

Cheers
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Old 12-09-2011, 07:48 AM   #3
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Originally Posted by seaniko7 View Post
Thats easy. Simply edit cron to execute at certain time shell script which will simulate power button/slider press.

Another way is to create same shell script with endless loop and 24 hour delay between simulating key press.

Cheers
So cron/script will run even when the kindle is in sleep/poweroff ???
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Old 12-09-2011, 10:51 AM   #4
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Obviously it wont work when your kindle is powered off, because you would need wake on lan functionality then. While in sleep state kindle can execute scripts without issues.
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Old 12-09-2011, 11:44 AM   #5
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Obviously it wont work when your kindle is powered off, because you would need wake on lan functionality then. While in sleep state kindle can execute scripts without issues.
Well, computer bioses have the ability to power on at a certain time, but i guess thats not possible with the kindles.

So one would just keep the kindle in sleep mode instead of power-off.
How long does a K4 last in sleep mode with a full battery ?

Edit: Ok, reading up on that it seems the kindle is basically never powered off, its always running even in sleep mode. Thats super-cool, so the "pull news at 5:30am" just needs some shell scripting !

Thanks seaniko7,
Cheers!

Last edited by karl_k; 12-09-2011 at 11:49 AM.
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Old 12-09-2011, 02:18 PM   #6
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Quote:
Originally Posted by seaniko7 View Post
Thats easy. Simply edit cron to execute at certain time shell script which will simulate power button/slider press.

Another way is to create same shell script with endless loop and 24 hour delay between simulating key press.

Cheers
Instead of simulating a slider button, which could also put an awake kindle into sleep mode, a kindle framework startup script uses the following "wakeUp" command to erase the screensaver on startup:

lipc-set-prop com.lab126.powerd wakeUp 1

I tested this command with SSH shell on a kindle keyboard 3G, and on a kindle DX. It wakes them from sleep mode. If the kindle is already awake, this command just displays an error message. It should work fine in a cron script.

Last edited by geekmaster; 12-09-2011 at 02:31 PM.
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Old 12-12-2011, 07:45 AM   #7
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Originally Posted by geekmaster View Post
Instead of simulating a slider button, which could also put an awake kindle into sleep mode, a kindle framework startup script uses the following "wakeUp" command to erase the screensaver on startup:

lipc-set-prop com.lab126.powerd wakeUp 1

I tested this command with SSH shell on a kindle keyboard 3G, and on a kindle DX. It wakes them from sleep mode. If the kindle is already awake, this command just displays an error message. It should work fine in a cron script.

great work!
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