This is a brief description on how to establish a telemetry link from a linux computer to an AutoQuad (and probably most other) flight controller using Bluetooth. The description has been tested under Ubuntu 14.04.
/etc/groupwhich means that the user is allowed to access serial devices. Please notice when you make changes to this file you have to relogin before the changes becomes active.
sudo rfcomm bind /dev/rfcomm0 98:D3:31:30:0B:F4
You now have a serial device:
/dev/rfcomm0 which you can use for communication with the AutoQuad M4 at 115200 bps.