[Letux-kernel] pyra wwan

[Michael Mrozek]

Am Freitag, den 02.08.2019, 16:50 +0200 schrieb H. Nikolaus Schaller

Hm, isn't that exactly what ModemManager should handle?
https://www.freedesktop.org/wiki/Software/ModemManager/

"ModemManager is a DBus-activated daemon which controls mobile
broadband (2G/3G/4G) devices and connections. Whether built-in devices,
USB dongles, bluetooth-paired telephones, or professional RS232/USB
devices with external power supplies, ModemManager is able to prepare
and configure the modems and setup connections with them."

Is the Gemalto-Modem that non-standard that it doesn't use the standard
commands?



> Hi,
> 
> > Am 02.08.2019 um 16:17 schrieb aTc <atc at k-n-p.org>:
> > 
> > Hi,
> > 
> > I got some extra sim cards to play with the modem a bit, but can't
> > really find any docs on how to get a data connection going.
> > 
> > I found the AT command specification, and the hardware interface
> > description, and from that side everything seems to connect and
> > respond fine, but nothing really for the steps required after that
> > on the linux side of things.
> > 
> > The letux wwan script also doesn't help here, with just a #todo and
> > it sending a command to get the module voltage in the pyra section.
> > 
> > It would be nice to know what all these ttyACM and wwan0/1 ethernet
> > ports are for, and how to use them properly.
> > 
> > Do you have any more docs/sdk stuff from gemalto on this ?
> 
> Unfortunatley, there isn't much more than the AT commands. And the
> 3GPP standards.
> The ttyACM ports are for AT commands - some do echo others don't. And
> some can send unsolicited messages.
> Allare more or less running in parallel. They have some predefined
> purposes "Application", "NMEA", "Modem".
> 
> So usually user-space uses some middleware taking care of all the AT
> commands and talking to the modem though one of the ttyACM ports.
> Examples of such middleware are FSO and ofono or RIL (Android).
> 
> The root/pin, root/dial and root/tam scripts do that with pure shell
> scripts and show several commands.
> 
> There is also https://github.com/akemnade/simple-gsmgui
> 
> But this all is for telephony and not data.
> 
> There is the root/wwan script and indeed it has only a stub for the
> Gemalto modem because I didn't find time to finish it and setup data
> connections myself.
> 
> The wwan ports seem to be instantiated automatically by the kernel
> because the module appears to support some standard-USB protocol.
> There is no special setup to make that happen. Maybe Ethernet over
> USB? But I do not know. I think dmesg and maybe /sys reveals
> something about these network interfaces and which driver is
> responsible.
> 
> So I think it could suffice to ifconfig up and add some routing table
> to make them work.
> Maybe it also needs some AT command to connect in 2G, 3G or 4G data
> mode. This should be in the list of AT commands.
> 
> The general approach should not be extremely different from the
> OPTION GTM601, just the vendor private AT commands differ.
> 
> Hope this helps to move a little forward.
> 
> BR,
> Nikolaus
> 
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> 
-- 
Mit freundlichen Grüßen,

Michael Mrozek

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