I have the same problem...
with noSleep.js you mean this ?
https://github.com/richtr/NoSleep.js/
and ...
@ Klaus... is this done already in krpano ?
how about your opinion on that problem ?
Hi,
It seems like the NoSleep.js program indicated by indexofrefraction
now also supports iOS in addition to Android systems. However I couldn’t
find a tutorial for this program and I don’t manage to make it
work. I have a problem right from the start to load the NoSleep.js
plugin: when launching the tour the following error message appears:
“ERROR: parsing ‘file://media/[...]/NoSleep.js’
failed:SyntaxError: Single function literal required”.
Do I have to define a function and if yes which one?
My code (just the part to load the .js plugin):
<!-- load the NoSleep plugin -->
<plugin name="NoSleep"
url="%CURRENTXML%/plugins/NoSleepFolder/dist/NoSleep.js"
preload="true"
keep="true"
/>
If someone could help me/share his/her code that would be brilliant,
per advance thank you.
this shouldn't be needed anymore with the newest krpano !
(read the release notes)
this shouldn't be needed anymore with the newest krpano !
(read the release notes)
Thank you very much for the hint!
From the release note I’ve found the loadjs() action, I believe it is what you mean I should use (because the mobilevr_waklock is only
available for VR and not for non-vr panos)?
I typed the following code in my tour.xml file:
onnewpano="if(device.handheld==true, set(krpano.NoSleep,true) | loadjs('%CURRENTXML%/plugins/NoSleep.js-master/dist/NoSleep.js'));"but it doesn’t work, the handheld device falls asleep after 15 seconds.
So I typed the following code in the onclick action of a full screen layer which is displayed as an introduction picture before the 360° pano:
onclick="set(layer[intro_image_2].visible,false);if(device.handheld==true, set(krpano.NoSleep,true) |
loadjs('%CURRENTXML%/plugins/NoSleep.js-master/dist/NoSleep.js'));”
And it doesn’t work, the handheld device falls asleep after 15 seconds.I feel I progressed thanks to you, but I am not there, yet. 
no no.. dont use NoSleep.js !
with 1.21 update (build 2023-04-30) you shouldn't have these issues
https://krpano.com/forum/wbb/inde…90234#post90234
New: Support the native wakelock API (for Android and iOS 16.4), this avoids that the screen gets dimmed or turned-off during VR viewing. This avoids ugly wake-lock hacks like playing a hidden video.
no no.. dont use NoSleep.js !
with 1.21 update (build 2023-04-30) you shouldn't have these issues
Thank you, I’ve noticed this paragraph, but it seems to me that it only applies to tours with VR, my tour is a non-VR tour (I have slides with text and audio comments with “camera” rotating in the 360° pano, and the phones/tablets go to sleep while these are being displayed/running), so I thought the NoSleep.js was more relevant for my project? The paragraph you mention leads to the mobilevr_wakelock attribute that is part of the webvr plugin, so I am not sure it will
work for me, but I’ll give it a try. If it doesn’t work, I’ll have to make the NoSleep.js work.
I don't know "nosleep.js", but is it not an optioni to just include it in the html, instead of going through krpano?
Like in https://github.com/richtr/NoSleep…mple/index.html
<script src="../dist/NoSleep.min.js"></script>
<script>
var noSleep = new NoSleep();
noSleep.enable();
</script>or call "noSleep.enable()" within krpano (after including NoSleep.js in the html) ?
@ Emmanuel-fr
you're probably right and there is no wake lock when not in VR.
not sure nosleep.js is a viable solution, though.
it is pretty old, the last commit was made in december 2020.
@ kme and @ indexofrefraction: thank you both for your insights.
I agree with you indexofrefraction that NoSleep.js might not work on latest Android and iOS devices.
I had some success in playing in loop a short transparent (alpha=0) video (as layer) which is 2 pixels by 2 pixels in size. It did work on an Android 7 smartphone but not on an Android 10 tablet. So, I will go on this route first, play with video size and scale a bit to see if it has any effect on the Android 10 tablet. I’ll post my results here.
i guess you should follow klaus way and use the wakelock API...
or maybe klaus sees this and opens a way to enable the krpano wakelock also for non-vr use
Hi,
here a small xml plugin that adds wakelock support to krpano (using only the native wakelock API, no ugly hacks):
wakelock.xml
Usage - first include the xml anywhere:
<include url="wakelock.xml" />
and then request the wakelock in any user-event (like a click):
<events onclick="requestwakelock();" />To release the wakelock later, just call:
releasewakelock();Best regards,
Klaus
Thanks Klaus!
Tuur 
Thank you so much Klaus!!! That’s just great!!!
Thank you as well indexofrefraction!!!
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