How do I find the device ID for cu?

Hello,

I have two Arduinos connected to my OpenBSD. I can connect to one of
them using the following command.

# cu -l cuaU0 -s 115200

I can't figure out what the equivalent of cuaU0 for the second one. How
can I find that ID when more than one device is connected?

--
Sadeep Madurange
PGP: 103BF9E3E750BF7E