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Rogan Dawes rogan at dawes.za.netHi Cyril, I am also interested in building my own applications into a self-contained unit, so would be keen to collaborate with you on this. My target is a D-Link DWM222-A2 LTE dongle. Is your module based on the same MDM9625 core, or something else? Regards, Rogan On Fri, 22 Jan 2021 at 12:54, Cyril HAENEL <chaenel at free.fr> wrote: > Hello, my name is Cyril HAENEL, and I am new on this mailing list :) > I subscribed to this list because I was looking for informations on > Quectel LTE modem, and yesterday I found this fantastic video : > https://media.ccc.de/v/33c3-8151-dissecting_modern_3g_4g_cellular_modems#t=690 > > I actually work on the Quectel LTE SC20 Smart module, which is proposed > with Android, but also Linux without all Android layers. > We want to use the Linux version and we use the official Quectel Linux > SDK, based on Yocto. > > We can successfully build and flash the image in the module, no problem > from this side. > > But the goal of this module is not to be used just as an LTE modem for an > external host, it's a standalone module and we embed our IoT application > inside. > > The problem we are facing is that we don't know how to start a broadband > connection !! There is absolutely no Quectel documentation about that, and > their support is really bad, they don't help us at all... > > So we done some reverse engineering to understand how the internal Modem > is connected to main processor, how to send him AT command, how to start > data connection, etc... > We finally found and understood all methods they use (Shared Memory > Devices, qmuxd, qmi proxy, QMI protocol, etc.....). > > But we are stuck to the same point, we don't find any easy way with > scripts or some utilities with config file (to set the APN for example) to > start a broadband connection :( > > We flashed an Android version in the SC20 to see how it works, and they > have Android applications which connect to netmgrd, qmuxd, etc.... > But we don't have these tools under Yocto Linux, so we wondering how we > can easily set our broadband connection. > > Any help or comment will be great :) > > Best regards, > Cyril > > > > > > -- > > Cyril Haenel > Registered Linux User #332632 > > _______________________________________________ > qc-linux-modems mailing list > qc-linux-modems at lists.osmocom.org > https://lists.osmocom.org/mailman/listinfo/qc-linux-modems > -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://lists.osmocom.org/pipermail/qc-linux-modems/attachments/20210122/feefd0d0/attachment.htm>