Adding a second GPS to Navio and GPS issues

[mlebret (Marc Lebret)]

@iriol

how do you tell Ardupilot that whats plugged into the serial port is Serial 4 GPS

Have a look at

https://community.emlid.com/t/apm-serial-port-numbers-on-navio-2/3984/5

I have 3DR Radio on USB and GPS2 on Navio UART

-C /dev/ttyUSB0 -E /dev/ttyAMA0

Marc