K4 K4NT - Help with Picture Frame

[c0c01]

K4NT
4.1.1 (1813030025)

Firstly sincere apologies for my complete lack of knowledge (i.e zero) regarding writing scripts! I have searched the forum and open source for some help and i have seem similar threads and have tried to cobble something together for several weeks already!

PROJECT
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I am looking to use a K4NT to display a random black & white line drawn comic strip which will change one or twice daily (and work on battery alone).

I currently have a jailbroken K4NT with the screensavers hack and basically I am trying to write a script that will just do the same as a human pressing the power button twice at a set time during the day (thus changing the screensaver to another random image before going to sleep again).
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I have been trying to use/adapt parts of other contributors scripts such as those by peterson and _nico

https://www.mobileread.com/forums/sh...=235821&page=3

where _nico is managing to get the following results with his Kindle KT3 on a single charge "57 eips updates a day, 30-35 days".

I have also poured over the onlinescreensavers hack and the kindle weather display and

https://www.linux.com/learn/wake-lin...alarm-clock%20

As a test I have been trying to set the K4NT to wake using the RTC (RTC1 as there is no wakealarm in RTC0) to wakeup after 100 seconds have lapsed using the code below which I start via the CLI when connected to the K4NT via SSH.

#!/bin/bash 

lipc-set-prop com.lab126.cmd wirelessEnable 0

echo Current Time : `date` `date +%s`
ENDWAIT=$(( `date +%s` + 100 ))
echo Wake Up Time : $ENDWAIT 

echo 0 > /sys/class/rtc/rtc1/wakealarm 
echo Readback time: `cat /sys/class/rtc/rtc1/wakealarm`
echo $ENDWAIT > /sys/class/rtc/rtc1/wakealarm

lipc-wait-event -mt com.lab126.powerd '*'

This produces these results but doesn't seem to wake the Kindle back up. I also found that following command will carry out a simulated press of the power button on the K4NT.

lipc-send-event com.lab126.powerd.debug dbg_power_button_pressed

Any help/advice greatly appreciated.
Thanks.

[yparitcher]

the K4NT has a different command for rtc, found after much trail and error.

lipc-set-prop -i  com.lab126.powerd rtcWakeup 100

however this can only be set when the kindle is in the readyToSuspend state which it enters for a few seconds before sleeping.

this can be trigger by writing a backround script to detect a kindle in readyToSuspend and optionaly wakeup state to have it run a script and reset th wakeup clock.

for example:
backround script

#!/bin/sh

# location of your program
PROGRAM=/mnt/us/program.sh
export LANG=en_US.UTF-8
export LC_ALL=en_US.UTF-8


do_program()
{
	if [[ -f "$PROGRAM" ]]; then
	  # run program function to set picture
	  $PROGRAM do
	fi
}

run_program()
{
	if [[ -f "$PROGRAM" ]]; then
	  # run program function to reset wakup rtc
	  $PROGRAM run
	fi
}

lipc-wait-event -m com.lab126.powerd goingToScreenSaver,readyToSuspend | while read event; do
	case "$event" in
		goingToScreenSaver*)
			do_program;;
		readyToSuspend*)
			run_program;
	esac
done;

program script

#!/bin/sh

do()
{
	# set picture using fbink or eips
}

run()
{
	do
	# set to your delay between picture changes
	DELTA=$(( `date +%s` + 300 ))
	lipc-set-prop -i  com.lab126.powerd rtcWakeup $DELTA
}

# Main
case "${1}" in
	"run" )
		${1}
	;;
	"do" )
		${1}
	;;
	* )
		run
	;;
esac

return 0

[Sol Arkite]

I noticed someone put together a project that reminded me of yours.
https://www.instructables.com/id/Lit...From-E-reader/

[c0c01]

yparitcher thanks so much for taking the time to explain and write both of those scripts!!!

I will try to get this working at the weekend when i have more time (as i will no doubt hit other problems). If i can get this working i owe you at least a beer.

Sol Arkite that Instructable was what had originally inspired me

[Sol Arkite]

Originally Posted by c0c01

Sol Arkite[/B] that Instructable was what had originally inspired me

[c0c01]

I'm afraid i will have to give up and admit defeat on this one!!!

Thanks for the help anyway.