QGroundControl will install all needed drivers to connect the flight controller, but the drivers might not yet be updated for the RDDRONE-FMUK66. When you plug in the FMU board after the installation of QGroundControl and Windows notifies you that no driver was found for this hardware, you have to modify the drivers.
To update the drivers, make a copy of the
C:\Program Files (x86)\px4 driver\Drivers folder to another location. Then, go to
Control Panel > Programs > Uninstall a program. There, uninstall the following drivers that were installed with QGroundControl:
Windows Driver Package - 3D Robotics (usbser) Ports (04/11/2013 184.108.40.206)
Windows Driver Package - Arduino LLC (www.arduino.cc) (usbser) Ports (11/15/2012 5.1.2600.1)
Windows Driver Package - FTDI CDM Driver Package - Bus/D2XX Driver (07/12/2013 2.08.30)
Windows Driver Package - FTDI CDM Driver Package - VCP Driver (07/12/2013 2.08.30)
In the copied driver folder, edit
px4fmu.inf to include the following vendor and product ID definitions in both lists (
USB\VID_26AC&PID_1001, USB\VID_26AC&PID_006E, USB\VID_1FC9&PID_001C
DPinstx64.exe executable can be used to reinstall the drivers. Note that on a 32 bit system, you will need to use the
If the driver for the telemetry radio is not automatically being installed after connecting it using USB, you will have to manually install these Virtual COM Port drivers. A link is provided on the downloads page.