Cubeorange serial3 and serial4 connections

ArduPlane Plane 4.3
1

The data output of the gps module I am using is rs232, do I need to convert it to ttl level to use it in cubeorange with gps1 or gps2?

2

If it’s true RS232, the voltage levels will be far too high. Cube UARTs operate at 3v3 logic levels.

3

The cubes use TTL level serial, (5v tolerant). Not RS232 levels.