Configuration with external gps

Navio / Edge Flight stack
1

Hey guys Im planning to buy a 3DR Ublox gps and compass how do I configure to use both the external gps on UART port and internal gps on the navio+? my 3dr radio on USB so my current config is ArduCopter-octa -C /dev/ttyUSB0

2

@Mariel_Tropico Hi! To use additional external GPS you can specify the -D argument like this:
ArduCopter-octa -C /dev/ttyUSB0 -E /dev/ttyAMA0