My bluetooth keyboard didn't work with tincore (but worked with my droid) until I downloaded SELinuxModeChanger. I had to set that app up to enable permissive mode on the OS.. . that requires a root though.
But once I did that everything worked.
You can do the same if this app by opening a terminal :
1. Su
2. Setenforce 0
3. Getenforce
The last command should show permissive.