Date: Tue, 18 Apr 2023 11:41:06 -0400 From: Mark Moellering <markmoellering@psyberation.com> To: questions@freebsd.org Subject: Re: serial from usb port, cu using /dev/cuau0 Message-ID: <a9a916bd-be59-57b3-5333-1b97085ac7a9@psyberation.com> In-Reply-To: <2a149c85-7aa3-c92c-0518-219d52971453@dreamchaser.org>
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On 4/18/23 08:32, Gary Aitken wrote: > Connected a USB to serial dongle to a USB port, > then a straight-through serial cable to my dsl modem. > > as root: > cu -h -t -s 9600 -l /dev/cuau0 > or maybe cuaU0 > > Whether anything is connected to the USB port or not, > when I issue the cu command, I always get a "connected" response. > > On one occasion two days ago, I swear the cu connected to the > usb-serial and I got a login prompt and poked around the modem. > > Assuming that actually happened, how does the system know which > usb / serial port to use? > > This mobo has a serial port with a dongle connected. It appears > to be activated in BIOS, as when I direct connect the serial cable > to it I get a connection to the modem. > > But I'm confused as to how I got it to work from a usb port. > Thanks for any insights, > > Gary > Gary, I connect via serial to a firewall, and I discovered that it usually comes up with a blank screen. The command I use is: cu -l cuaU0 -s 115200 If I hit enter, then the login prompt appears but otherwise, I , like you, often see "connected", with an otherwise black screen and no prompt. hope this helps. -- Markhelp
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