[Frogm4n]

Check the MAC address of your BT keyboard. That output shows it started trying to pair, but it's not finding it.

I was able to get a BT keyboard working. I had to troubleshoot my own typo of a single missing character from the shell script, but other than that it went off ok. Input worked in most places I'd expect. Kindle UI text boxes, kterm, Leafpad. However, it did not work in KOReader at all. Not in textboxes, the texteditor, or the terminal. I'm assuming that's a KOReader issue and nothing to do with the input method itself. I'm guessing there are input checks and since Kindles haven't been able to use BT keyboards before, they don't expect input from one. I'm sure if they get BT input working then BT page turners to use keycodes would work as-is inside of KOReader.

The Kindle even shows the connected keyboard name under the BT icon in the Kindle pull-down quick menu. Interestingly, it also shows/hides the volume slider depending on if it's connected or not. They must have that tied to having any BT device connected.

There doesn't seem to be any native Kindle book reader UI reaction to arrows/PgDn/PgUp. That's going to rule out BT page turners that send keycodes. I know there was a lot of hope about getting those working on a Kindle. I don't know how other types work, but if udev rules could be written for them and a custom script watches the /dev/input/eventX file and can route event messages to the UI...