Samsung actually made this keyboard attachment for the Note 5. Don't know how well it worked but apparently the screen adjusted size when you attached it. Personally, I've gotten used to on screen keyboards and use a phone with a larger screen to have sufficient visual space. I need a large screen anyway so adding a hwkb would make it too cumbersome. Hackers keyboard gives you all they keys you most likely will need (tab, Ctrl..). I actually change keyboards depending on application. Hard to do with a hwkb! Regardless, adding a hwkb would be a fun project to try.

http://www.bhphotovideo.com/bnh/cont...C&Q=&A=details