Omnibus F4 pro UART

Hardware Companion Computers
1

Hello
I have flashed my Omnibus F4 pro v3 to Ardupilot and would like to use OrangePi Zero as an companion computer.
However, I cant set up any telemetry link between omnibus and orangepi.
I use UART1 as telemetry output on Omnibus and have enabled UART1 on Armbian running on Orangepi.
The biggest secret is the uart voltage level on Omnibus, is it 5 or 3.3V
On OrangePi itโ€™s 3.3V

2

Almost all flight controllers use 3.3v. including the omnibus f4 pro.

3

Yes the Omnibus UART is 3.3v as are all other signal pins on the Omnibus F4 pro v3.
I use two of them but interface directly with a Raspberry Pi 3B and Zero W tx/rx pins directly, that operate at 3.3v signal levels.