We are running power testing and we need to make sure their isn't USB device plugged in it adds to the total system power by having the USB port activate.
I am trying to do a automated is USB plugged. We are using multiple generations of systems that are regularly reinstalled. On Mon, Jan 22, 2024, 9:42 AM Russell Senior <[email protected]> wrote: > I don't quite understand. You are looking for a specific device? How do you > identify the device? > > On Mon, Jan 22, 2024 at 9:35 AM Vince Winter <[email protected]> > wrote: > > > I need if USB device is plugged to not to continue the rest of the script > > across multiple devices. I can't change every device and I am trying to > > eliminate humans looking at which devices are plugged in. > > > > I do conceded that many laptop cameras are USB and Bluetooth generally > runs > > on the USB bus. > > > > I have yet to find a good answer to this myself. > > > > On Fri, Jan 19, 2024, 3:54 PM Russell Senior <[email protected]> > > wrote: > > > > > Two things I will mention: lsusb and udev rules. > > > > > > I have a set of udev rules that match ttyusb devices by path (they > don't > > > implement serial numbers, which would be better) and give them a > > > consistently named symlink. I use /dev/ttyRn, where n is a whole > number. > > > That means no matter what order they are enumerated in, I can find the > > > device. > > > > > > I don't know if that helps with your problem or not, but I have found > > them > > > to be useful in adjacent problems. > > > > > > -- > > > Russell > > > > > > On Fri, Jan 19, 2024, 15:17 Vince Winter <[email protected]> > > > wrote: > > > > > > > Hello, > > > > > > > > I am trying to write a bash script to detect if USB device is plugged > > > into > > > > a device and post a message with a device name that is plugged to > > stdout. > > > > > > > > Complications are USB webcams, USB controllers, and this is going to > be > > > > used on large number of systems, so I can't customize to each system. > > > > > > > > > >
