Specify Serial address in android

So due to many other issues, I’ve resorted to using Android instead of Ubuntu. I am using an arduino connected over USB and it’s working like I’m wanting in RealDash, but there’s one issue that I’m running into, and it’s running out of USB ports on the Odroid N2 that I’m using. I’ve connected an arduino to the UART TX/RX ports on the odroid and in ADB if I “cat /dev/ttyS1” I can see the canbus data coming in.

I’m unsure of how to either mount /dev/ttyS1 as a serial port to be used in RealDash in the list of Serial/USB devices or if there would be a way to specify to use /dev/ttyS1 as a serial device in the android version of RealDash.