It is definitely possible on Linux. Some time ago I found this project: http://nohands.sourceforge.net/index.html They emulate a full-blown headset with audio and keyboard controls on the Linux bluetooth stack. If they can emulate something like that, you would probably be able to emulate something simpler like a keyboard.
You’ll want uinput. You’ll listen on your /dev/usb/hiddev0 and then create new events that you’ll send out on /dev/input/uinput. This explains it and gives a little tutorial: Using uinput driver in Linux- 2.6.x to send user input {This is the EInfochips’ “Dashboard” publication issue January 2007 “Tip of the Month” article mentioned on this archived … Read more
This answer is on the wrong website! A lot of my reputation on StackOverflow has come from people voting up this answer, which I wrote way back before I realised that there are several stack exchange websites and that StackOverflow is for programming questions and answers only. Therefore the question above is about how to … Read more