Re: Jolla Solar Half prototype
 

Hi,
yesterday i hacked jolla's kernel so that CPU goes to deep sleep even while charging and got first success. I can see the phone being charged with current ~3mA (see attached screenshot). I have no idea if that will be useful for anything though :D

Now i am waiting for sunny day and more powerful solar panel...

Re: Jolla Solar Half prototype
 

Anything new?? =) This would be awesome, I need this for my looong trips haha

Re: Jolla Solar Half prototype
 

I need this for my bike trip too, but the bigger solar panel havent arrived after month of waiting :(

For now i am experimenting with crank charger from evolveo, but IMO there is same problem as with solar charger - the CPU does not go in standby while USB is plugged so the charging current is rather low and i was unable to charge single % of battery until now...

We should either somehow fix Jolla or it would be needed to charge some external battery/capacitor first and use it to provide high current.

Re: Jolla Solar Half prototype
 

How many hours can take to charge the battery of the Jolla using our first proto of the solar charger?
And maybe could be possible some hack to make the CPU stand by and charge faster...

Re: Jolla Solar Half prototype
 

With my proto it would take propably ~15 hours in the best-case scenario but in reality it will never happen.

Re: Jolla Solar Half prototype
 

You, my friend, have invented phone with infinite standby time :)

BTW, would you happen to have that kernel hack in a git tree somewhere?

Re: Jolla Solar Half prototype
 

I have it on my computer at home. I can dig it up and put online in the evening. But even with this hack it's not usable, see:

https://together.jolla.com/question/...-toh-charging/

Re: Jolla Solar Half prototype
 

bump

had some interesting results with a panel, but still a lot of room for improvement in standby current and deep sleep while charging.

i would love to experiment with that deep sleep kernel hack, please dig that up!

Re: Jolla Solar Half prototype
 

Ok, here it is:

http://activationrecord.net/radekp/p...akelocks.patch

How to build? I have dumped jolla's boot partition, unpacked it, assembled with my custom kernel and flashed to recovery partition. It can be then booted using POWER+VOLUME buttons. Maybe i could rebuild and upload the partition img for latest jolla release.

How to test? Make simple script which blinks with led. When CPU is alive it blinks, when CPU goes to suspend it stops blinking.

On jolla stock kernel:

- blinks during charging -> CPU awake
- stops blinking when not charging -> CPU suspended

On patched kernel:

- always stops blinking always -> CPU suspended

Re: Jolla Solar Half prototype
 

Are you planning to release flashable image for the latest update ? :)