Connection Option #1 - Mission Planner and Pixhawk as Passthrough
The mission planner and pixhawk can pass through the communication between u-center and the GPS by doing the following:
Connect to Pixhawk to your PC and connect with the Mission Planner
On the Flight Data screen press Ctrl-F and then select “MAVSerial pass”
Open u-center and select Receiver, TCP Client and in the Network Connection window set Address to “localhost” and Port to “500” and press OK.
See instructions below as to how to upload config with u-center.