Trying to understand USB connection in syslog

I have connected a USB modem to my BBB. In looking at the syslog, I see the following:


I am needing to execute a script and specify which ttyUSB* but am a bit confused on knowing which to use.

Sadly it really depends on the modem, there’s really no good one standard for these guys…

Searching based on the vid/pid found:

Looks like the 2nd port is for AT commands… Do you have any docs on the modem?



Thanks for the response Robert.

I have some guides and tutorials from the site,

I ended up running through each one and in my script and ttyUSB2 was the winner. Which jives with what you found regarding the AT commands.