“AB Shutter3” bluetooth remote camera shutter release controller as Kobo Libra 2 page turner.
“Camera 360/IOS” button on “AB Shutter3" device triggers KEY_VOLUMEUP event, while “android” - KEY_VOLUMEDOWN. This is different from other similar devices, for example
https://www.mobileread.com/forums/sh...&postcount=193
,
https://dev.to/wincentbalin/key-code...shutter-3-2n0h .
I installed UHID kernel module (
https://www.mobileread.com/forums/sh...d.php?t=352280) on my Kobo Libra 2 and with
kobo-btpt configuration file “AB Shutter3”:
Code:
prevPage EV_KEY KEY_VOLUMEDOWN 1
nextPage EV_KEY KEY_VOLUMEUP 1
can turn pages in both directions.
Adding some electrical tape between buttons and the housing makes the “keyboard” a bit THOCKier

.
Some packaging foam between PCB and the housing further reduces clicky sound - great for reading at night.
The remote was recently purchased on Aliexpress (~2$, Elbert Store). The only IC on the PCB has no label.