Possible to take and send screenshots every few seconds?

jmite · 02-06-2022, 10:59 PM

I'm totally new to Kobo development, but I've got some things I'd really like to work and I'm wondering if people can point me in the right direction, or at least tell if it's possible. (I'm not new to programming).

Basically, I'd like to use my Kobo Elipsa as a "virtual whiteboard", so I can write on it and then view its screen on my computer, to be screen-shared on Zoom etc.

It looks like it's possible to take screenshots: https://teleread.org/2018/06/30/revi...-e-ink-reader/

So I'm wondering if it's possible to write a script that, when activated (maybe by NickelMenu?) takes a screenshot every few seconds and send it somewhere (maybe sends it via HTTP to a server I set up, maybe syncs a file over ftp, maybe syncs with Dropbox, something like that).

Is this possible? I've seen NickelDbus and NickelHook. I'm still wading through their API docs, so I'm not sure if they will be any help.

Ideally I'd prefer not to do anything dangerous, I don't want to brick my Elipsa

Thanks!

NiLuJe · 02-07-2022, 07:48 AM

Grabbing the screen's buffer on sunxi is... more tedious than it used to be, so it's going to be highly clunky, because you can't just grab the fb anymore.

c.f, https://github.com/NiLuJe/FBInk/blob...s/sunxigrab.sh

jmite · 02-07-2022, 01:35 PM

That's good to know, thanks for the link.

I can see how I'd modify that script to e.g. send the BMP every few seconds.

Do you have pointers for:
* How I can get the script onto the Kobo?
* Where I can see a list of what commands are available? e.g. is there Curl? wget?
* How I can launch the script, and once it's running (looping), stop it?

NiLuJe · 02-07-2022, 05:18 PM

Shameless self-plug

.

02-06-2022, 10:59 PM	#1
jmite Member Posts: 10 Karma: 10 Join Date: Oct 2019 Device: Kobo Mini, Sony PRS-T1	Possible to take and send screenshots every few seconds? I'm totally new to Kobo development, but I've got some things I'd really like to work and I'm wondering if people can point me in the right direction, or at least tell if it's possible. (I'm not new to programming). Basically, I'd like to use my Kobo Elipsa as a "virtual whiteboard", so I can write on it and then view its screen on my computer, to be screen-shared on Zoom etc. It looks like it's possible to take screenshots: https://teleread.org/2018/06/30/revi...-e-ink-reader/ So I'm wondering if it's possible to write a script that, when activated (maybe by NickelMenu?) takes a screenshot every few seconds and send it somewhere (maybe sends it via HTTP to a server I set up, maybe syncs a file over ftp, maybe syncs with Dropbox, something like that). Is this possible? I've seen NickelDbus and NickelHook. I'm still wading through their API docs, so I'm not sure if they will be any help. Ideally I'd prefer not to do anything dangerous, I don't want to brick my Elipsa Thanks!

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02-07-2022, 07:48 AM	#2
NiLuJe BLAM! Posts: 13,483 Karma: 26012494 Join Date: Jun 2010 Location: Paris, France Device: Kindle 2i, 3g, 4, 5w, PW, PW2, PW5; Kobo H2O, Forma, Elipsa, Sage, C2E	Grabbing the screen's buffer on sunxi is... more tedious than it used to be, so it's going to be highly clunky, because you can't just grab the fb anymore. c.f, https://github.com/NiLuJe/FBInk/blob...s/sunxigrab.sh

02-07-2022, 01:35 PM	#3
jmite Member Posts: 10 Karma: 10 Join Date: Oct 2019 Device: Kobo Mini, Sony PRS-T1	That's good to know, thanks for the link. I can see how I'd modify that script to e.g. send the BMP every few seconds. Do you have pointers for: * How I can get the script onto the Kobo? * Where I can see a list of what commands are available? e.g. is there Curl? wget? * How I can launch the script, and once it's running (looping), stop it?

02-07-2022, 05:18 PM	#4
NiLuJe BLAM! Posts: 13,483 Karma: 26012494 Join Date: Jun 2010 Location: Paris, France Device: Kindle 2i, 3g, 4, 5w, PW, PW2, PW5; Kobo H2O, Forma, Elipsa, Sage, C2E	Shameless self-plug .