Tridge and others interested in dual GPS,
I have now got the second GPS in business. Connected it to the serial 4 port, i.e. pin 2 and 3 on the serial 4/5 port connector.
In my bench tests MP reports NO GPS in the combination PFD instrument view, and no GPS data (I connected the second GPS alone, no primary GPS) in the status tab, except for GPS time which seems to get updated. Still MP seems to display the aircraft map position reported from the secondary GPS.
Running the terminal mode GPS test returns the values being reported from the secondary GPS.
To sum it up - seems to do its job but Mission Planner needs an update on the GPS presentation.
Oh, and I am using a 3DR uBlox LEA6 v1.1 GPS as secondary. Had to hack the connectors / cable to make it hook up to the Pixhawk.
I am on the most recent MP version, as per auto update.
PS. Just added an issue on the tracker about MP/ NO GPS display.