Make function keys on Logitech k780 keyboard by default (bluethooth & unifying)
I captured the payload using https://github.com/djpnewton/busdog
based on
https://github.com/jergusg/k380-function-keys-conf
http://www.trial-n-error.de/posts/2012/12/31/logitech-k810-keyboard-configurator/
https://github.com/embuc/k480_conf
look there for more information