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Author Topic: SG-3100 - which cellular module  (Read 636 times)

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Offline conor

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Re: SG-3100 - which cellular module
« Reply #15 on: December 05, 2017, 02:06:37 pm »
on the 7455 the equivalent command is:

AT!USBCOMP=?

which gives:

!USBCOMP:
AT!USBCOMP=<Config Index>,<Config Type>,<Interface bitmask>
  <Config Index>      - configuration index to which the composition applies, should be 1

  <Config Type>       - 1:Generic, 2:USBIF-MBIM, 3:RNDIS
                        config type 2/3 should only be used for specific Sierra PIDs: 68B1, 9068
                        customized VID/PID should use config type 1

  <Interface bitmask> - DIAG     - 0x00000001,
                        NMEA     - 0x00000004,
                        MODEM    - 0x00000008,
                        RMNET0   - 0x00000100,
                        RMNET1   - 0x00000400,
                        MBIM     - 0x00001000,
  e.g.
  10D  - diag, nmea, modem, rmnet interfaces enabled
  1009 - diag, modem, mbim interfaces enabled

  The default configuration is:
  at!usbcomp=1,1,10F

OK

Offline stephenw10

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Re: SG-3100 - which cellular module
« Reply #16 on: December 05, 2017, 04:41:07 pm »
Ah interesting, maybe then.

Does it show more options if you run that in 'command mode'?

What does the rmnet interface present as?

Steve
« Last Edit: December 05, 2017, 04:47:02 pm by stephenw10 »

Offline conor

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Re: SG-3100 - which cellular module
« Reply #17 on: December 06, 2017, 06:02:07 am »
Got a reply from distributor, the EM7455 only supports one modem/AT port, so if you use PPP you can't check the status/signal while the PPP connection is up.  :(

Sierra suggested looking at MBIM for data and that then frees up the modem/AT port for command and control.

Offline conor

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Re: SG-3100 - which cellular module
« Reply #18 on: December 06, 2017, 11:19:52 am »
Just for reference for anyone looking at this.

The diag port is Qualcomm chipset encrypted log stream. You need to have a QXDM license from Qualcomm if you want to decrypt this data.

Offline stephenw10

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Re: SG-3100 - which cellular module
« Reply #19 on: December 06, 2017, 01:09:25 pm »
You need to have a QXDM license from Qualcomm if you want to decrypt this data.

Urgh.

I suspected that might be the case with the ports.

It looks like you need to use either QMI (rmnet) or MBIM to pass the data in order to leave the AT interface for status as you say.

It also looks like you can't use Direct IP as you could with some earlier Sierra devices. Though I wonder if config type 3 (rndis) might give that....

And as mentioned in this thread that you will be limited to non-LTE speeds if you use ppp.  :-\

Still looking into it.

Steve

Offline johnkeates

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Re: SG-3100 - which cellular module
« Reply #20 on: December 10, 2017, 06:24:20 am »
Yeah, PPP and Serial mode is not really the way to go anymore. In some cases, even USB CDC Ethernet with the on-card configuration interface (and basically a full router) is the fastest way to go.

Offline stephenw10

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Re: SG-3100 - which cellular module
« Reply #21 on: December 10, 2017, 10:28:32 am »
Yes, often easiest as long as it presents an interface pfSense can use.

The EM7345 looks interesting. Offers an AT and USB-Ethernet interface. Not sure if either are usable though right now.

I'm still waiting for Three to deliver a SIM card I can use to test some of this is real world conditions.  >:(

Steve