Pixhawk serial port config question

ArduCopter Copter 3.3
1

Help, I’ve run out of serial ports!

I’m using;

Serial 0 = USB
Serial 1 = MAvlink Telemetry (to bluetooth or 433mhz depending)
Serial 2 = Frsky Telemetry (goes to Taranis)
Serial 3 = default GPS no.1
Serial 4 = Secondary backup GPS no.2

And as far as the mission planner ground control software is concerned that’s all i get to configure.

According to this page and the marking on my pixhawk;

copter.ardupilot.com/wiki/common … -overview/

There is a 5 serial port that shares a plug with serial port no. 4. How do i configure and make use of this port? I want to add in a serial based brushless gimbal and I’d rather not have to fly without the secondary GPS if possible.

2

Don’t know why you need two GPS devices. This is currently not recommended and can cause the copter to crash.
Ports 4 and 5 share a plug so you will need to use a splitter cable to make it work.

Mike