<div dir="ltr"><div><div><div>Answering through ModemManager, for this is where the code uses the /dev/ttyUSBx device. </div>Well, if you want to have a modem connection up and ready through NetworkManager/ModemManager, they're doing the job, and you won't need to access the device anyway. This is obviously not what you're doing, so I'd say let the ModemManager off this modem. </div>If you're trying to establish a socket connection to a server, then it looks like you're trying to use the modem as a data connection still. Then ModemManager makes what you want... </div>So, if you're trying to use the modem as a data carrier, ModemManager/NetworkManager do all the unpleasant part for you, what is your reason for accessing the device ? You possibly need no more that a few lines of C to have an elementary multiplexer on your device (and set up MM to use the multiplex instead of ttyUSBx). </div><div class="gmail_extra"> <div class="gmail_quote">On Thu, Aug 11, 2016 at 4:03 PM, Ajay Garg <<a href="mailto:ajaygargnsit@gmail.com" target="_blank">ajaygargnsit@gmail.com</a>> wrote: <blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">CCing NM and MM guys. On Thu, Aug 11, 2016 at 2:23 PM, Ajay Garg <<a href="mailto:ajaygargnsit@gmail.com">ajaygargnsit@gmail.com</a>> wrote: > Hi All. > > Have posted the question on Sierra-forums > <a href="https://forum.sierrawireless.com/viewtopic.php?f=117&t=9898" rel="noreferrer" target="_blank">https://forum.sierrawireless.com/viewtopic.php?f=117&t=9898</a> > Posting it here as well, as the activity there is relatively low, and > this is where all the kernel-guys hand :) > > > I am using a Ubuntu interfaced with a Sierra-MC8090 module. > > Right now MC8090 is identifed as a network-interface on Linux, made > possible by the usage of "sierra" (serial-driver) and "sierra_net" > (direct-ip usb-to-wwan driver) kernel-drivers. This "mostly" works, > except that we, in the user-application, are not able to access the > serial-file /dev/ttyUSB3 (this file is in constant usage by > /usr/sbin/ModemManager). > > Now, my question is, if we disable loading the "sierra_net" driver, > and use just "sierra" driver to communicate on the serial-port, will > using the Sierra-Linux-QMI-SDK do the job? In particular, > > * > I understand that we will now have exclusive access (please correct me > if I am wrong) to the serial-port /dev/ttyUSB3. > > * > How to do we create a socket to a particular server-port using the > QMI-SDK? I can see in the examples that we can start a data-call for a > profile (ConnectGSM.c), but I am unable to find how to instantiate a > socket through which we can do regular reads/writes. > > > Will be grateful to hear back from someone. > > > Thanks and Regards, > Ajay -- Regards, Ajay _______________________________________________ networkmanager-list mailing list <a href="mailto:networkmanager-list@gnome.org">networkmanager-list@gnome.org</a> <a href="https://mail.gnome.org/mailman/listinfo/networkmanager-list" rel="noreferrer" target="_blank">https://mail.gnome.org/mailman/listinfo/networkmanager-list</a> </blockquote></div> </div>