Using qmicli with a Sierra Wireless EM7455

[Aleksander Morgado]

Hey

> The question arose from this post:
>
> Am Di., 23. Juni 2020 um 09:18 Uhr schrieb Aleksander Morgado
> <aleksander at aleksander.es>:
> >
> > Here's your command output; see inline.
> >
> > > Command: mbim-network /dev/cdc-wdm0 start
> > >
> > > Loading profile at /etc/mbim-network.conf...
> > >     APN: internet.telekom
> > >     APN auth protocol: PAP
> > >     APN user: telekom
> > >     APN password: telekom
> > >     mbim-proxy: no
> > > Querying subscriber ready status 'mbimcli -d /dev/cdc-wdm0 --query-subscriber-ready-status --no-close '...
> > > [/dev/cdc-wdm0] Subscriber ready status retrieved: Ready state: 'initialized' Subscriber ID: 'xxxxxxxxxxxxxxx' SIM ICCID: 'xxxxxxxxxxxxxxxxxxxx' Ready info: 'none' Telephone numbers: (1) '+xxxxxxxxxxxxx' [/dev/cdc-wdm0] Session not closed: TRID: '3'
> > > Saving state at /tmp/mbim-network-state-cdc-wdm0... (TRID: 3)
> >
> > This is good, your SIM is ready to be used.
> >
> > > Querying registration state 'mbimcli -d /dev/cdc-wdm0 --query-registration-state --no-open=3 --no-close '...
> > > [/dev/cdc-wdm0] Registration status: Network error: 'unknown' Register state: 'home' Register mode: 'automatic' Available data classes: 'lte' Current cellular class: 'gsm' Provider ID: '26201' Provider name: 'Telekom.de' Roaming text: 'unknown' Registration flags: 'packet-service-automatic-attach' [/dev/cdc-wdm0] Session not closed: TRID: '4'
> > > Saving state at /tmp/mbim-network-state-cdc-wdm0... (TRID: 4)
> >
> > This is good, you're already registered in your home network. What
> > does mbimcli --query-signal-state say about the access technology in
> > use?
>
> So I tried `$ mbimcli -p -d /dev/cdc-wdm0 --get-signal-state` and
> expected some hint on LTE or 3G in use.
>
> What I obtained instead was:
>
> /dev/cdc-wdm0] Signal state:
>               RSSI [0-31,99]: '8'
>          Error rate [0-7,99]: '99'
>     Signal strength interval: '5'
>               RSSI threshold: '2'
>         Error rate threshold: 'unspecified'
>
> What does this tell about the "access technology in use" you mentioned?
>

Oh, nothing of course, because RSSI level may apply to all access
techs in this context.

I meant "--atds-query-signal" instead:
$ sudo mbimcli -d /dev/cdc-wdm0 -p --atds-query-signal
[/dev/cdc-wdm0] Signal info retrieved:
          RSSI: unknown
           BER: unknown (99)
          RSCP: unknown
         Ec/No: unknown
          RSRQ: -10,50 dBm
          RSRP: -102 dBm
         RSSNR: 13 dB

In the above output, RSCP and Ec/No are 3G-specific, RSRQ, RSRP and
RSSNR are 4G-specific.

-- 
Aleksander
https://aleksander.es