Herelink Telemetry using custom android app


I’m trying to build a custom app and I have cube orange telem1 port connected to Herelink Airunit UART port. How do I make my custom android app read and send Mavlink messages?
Does QGC use serial communication or udp port when its connect to UART port on herelink? if udp, which port will it be?

Thank you for your help!