Reading state from device

[abergmeier]

Shouldn't there be a way of reading the current state off the device?

[kharyam]

Hey @abergmeier there probably is, but I haven't gotten around to reverse engineering that capability. I'll keep this issue on the backlog, thanks!

[abergmeier]

FYI: I am currently working on getting the Litra into the kernel: https://www.spinics.net/lists/linux-usb/msg232494.html

Still quite a few problems to figure out, though.

[IngoHenning]

On Windows G-Hub is not able to read the current state of the device. If I change the brightness or temperature outside of G-Hub and start G-Hub afterwards, G-Hub always shows the last values set through G-Hub. That said I'm not very optimistic to get the current state from device.

By the way, great work so far. I adapted your code to powershell, trying to use the Litra Glow with Stream Deck. Presets work quite good, am looking for brightness and temperature up and down now.

[abergmeier]

On Windows G-Hub is not able to read the current state of the device. If I change the brightness or temperature outside of G-Hub and start G-Hub afterwards, G-Hub always shows the last values set through G-Hub.

Noticed that too when sniffing the usb communication.

That said I'm not very optimistic to get the current state from device.

Oh, you totally can. I already do it in the kernel.
You can e.g. send 11ff0401 00000000 00000000 00000000 00000000 to get the on/off state or 11ff0431 00000000 00000000 00000000 00000000 to get the brightness.

[Jcapehart2]

On Windows G-Hub is not able to read the current state of the device. If I change the brightness or temperature outside of G-Hub and start G-Hub afterwards, G-Hub always shows the last values set through G-Hub.

Noticed that too when sniffing the usb communication.

That said I'm not very optimistic to get the current state from device.

Oh, you totally can. I already do it in the kernel. You can e.g. send 11ff0401 00000000 00000000 00000000 00000000 to get the on/off state or 11ff0431 00000000 00000000 00000000 00000000 to get the brightness.

Nice on the state check, how did you get those and did you get the one for temperature?

[abergmeier]

Read the spec and implemented the kernel driver. For temperature it should be sending 11ff0481 00000000 00000000 00000000 00000000