On Tue, Aug 09, 2016 at 12:48:12PM +0530, Ajay Garg wrote: > Hi All. > > We are using Sierra's USB-to-WWAN driver on Ubuntu-14 for Sierra's > MC8090 modem, and we have a requirement wherein we need to have access > to the modem-serial-port (from our user-application that is). > > Right now, we see that /usr/sbin/ModemManager is always connected to > /dev/ttyUSB3 (which means we cannot connect to the port from our > application at the same time, or even if we can, received-data will be > at best inconsistent). > > > We are thinking of the following :: > > * Initially, let nmcli and ModemManager do their work, and let them > bring the WWAN interface up. > > * Once this happens, we permanently-down the ModemManager from our > application-binary, thereby freeing up /dev/ttyUSB3. > > * Thereafter, we are free to connect to /dev/ttyUSB3 from our > application, thereby using features like SMS-notification (+CMTI), > signal-strength (+CSQ), etc. > > > > Does our approach make sense? > We will be grateful to any help. Why not ask the modem manager team about this? The kernel doesn't care what you do with the device links :) thanks, greg k-h -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
