Just something I did not find a solution for directly @recalbox...
Simple steps that worked for me on my pi:
- Exit emulation station with F4 and press ALT+F2 to enter the terminal and login with root and pw recalboxroot (or ssh)
- put your keyboard into pair mode (with the Apple one: hold power button until LED starts blinking)
- type command 'bluetoothctl'
with up/down arrow you can see some common commands it seems and with command 'scan on' you can get a list of bluetooth-devices. - type pair XX:XX:XX:XX:XX:XX (replace with address of your keyboard)
- you will get a 6 digit code displayed in the terminal; type it on your wireless keyboard, followed by enter
- type 'connect'
- reboot and the keyboard keeps connecting/working!
Would be nice if the GUI could handle this situation too. It seems to not know how to handle the pairing PIN part?