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<font face="Adobe Helvetica">Hi Rogan,<br>
<br>
No problem to collaborate :)<br>
No it's not the same core, the Quectel SC20 module is based on the
MSM8909 (Qualcomm Snapdragon 210).<br>
<br>
Regards,<br>
Cyril<br>
<br>
</font><br>
<div class="moz-cite-prefix">Le 22/01/2021 à 12:31, Rogan Dawes a
écrit :<br>
</div>
<blockquote type="cite"
cite="mid:CAOYdKdhvnRit8t2Nk9e1G1vCCEzpk1y89k339LtwtyVjKykK1g@mail.gmail.com">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<div dir="ltr">Hi Cyril,
<div><br>
</div>
<div>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?</div>
<div><br>
</div>
<div>Regards,</div>
<div><br>
</div>
<div>Rogan</div>
<div><br>
</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Fri, 22 Jan 2021 at 12:54,
Cyril HAENEL <<a href="mailto:chaenel@free.fr"
moz-do-not-send="true">chaenel@free.fr</a>> wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px
0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div> Hello, my name is Cyril HAENEL, and I am new on this
mailing list :)<br>
I subscribed to this list because I was looking for
informations on Quectel LTE modem, and yesterday I found
this fantastic video :
<a
href="https://media.ccc.de/v/33c3-8151-dissecting_modern_3g_4g_cellular_modems#t=690"
target="_blank" moz-do-not-send="true">https://media.ccc.de/v/33c3-8151-dissecting_modern_3g_4g_cellular_modems#t=690</a><br>
<br>
I actually work on the Quectel LTE SC20 Smart module, which
is proposed with Android, but also Linux without all Android
layers.<br>
We want to use the Linux version and we use the official
Quectel Linux SDK, based on Yocto.<br>
<br>
We can successfully build and flash the image in the module,
no problem from this side.<br>
<br>
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.<br>
<br>
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...<br>
<br>
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...<br>
We finally found and understood all methods they use (Shared
Memory Devices, qmuxd, qmi proxy, QMI protocol, etc.....).<br>
<br>
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 :(<br>
<br>
We flashed an Android version in the SC20 to see how it
works, and they have Android applications which connect to
netmgrd, qmuxd, etc....<br>
But we don't have these tools under Yocto Linux, so we
wondering how we can easily set our broadband connection.<br>
<br>
Any help or comment will be great :)<br>
<br>
Best regards,<br>
Cyril<br>
<br>
<br>
<br>
<br>
<br>
<pre cols="72">--
Cyril Haenel
Registered Linux User #332632
</pre>
</div>
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</blockquote>
</div>
</blockquote>
<br>
<pre class="moz-signature" cols="72">--
Cyril Haenel
Registered Linux User #332632
</pre>
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