MC7430 Connection problem

[Alexandru Ardelean]

On Tue, Oct 3, 2017 at 9:38 AM, Erik Kazandjian
<erik.kazandjian at accelleran.com> wrote:
> Hi,
>
> I managed to set an ip address on my interface and pass data once. However
> this was a lucky shot as I can not reproduce it.
>
> This is what I have done.
>
> I rebooted the pi
>
> ifconfig  wwan0  down
> echo Y > /sys/class/net/wwan0/qmi/raw_ip
> ifconfig  wwan0  up
>
> The strange thing that I noticed here is that my wwan0 interface no longer
> has a hw address ?
>
> wwan0     Link encap:UNSPEC  HWaddr
> 00-00-00-00-00-00-00-00-00-00-00-00-00-00-00-00
>           UP POINTOPOINT RUNNING NOARP MULTICAST  MTU:1500 Metric:1
>           RX packets:0 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:54 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:1000
>           RX bytes:0 (0.0 B)  TX bytes:11670 (11.3 KiB)
>
> wwan1     Link encap:Ethernet  HWaddr 86:10:a5:53:2a:0a
>           inet addr:169.254.80.97  Bcast:169.254.255.255 Mask:255.255.0.0
>           inet6 addr: fe80::5d36:cbca:3f4f:c40f/64 Scope:Link
>           UP BROADCAST RUNNING MULTICAST  MTU:1500  Metric:1
>           RX packets:0 errors:0 dropped:0 overruns:0 frame:0
>           TX packets:56 errors:0 dropped:0 overruns:0 carrier:0
>           collisions:0 txqueuelen:1000
>           RX bytes:0 (0.0 B)  TX bytes:12074 (11.7 KiB)
>
> I set modem in standby, this causes the modem to dettach (as it
> automatically attaches when it comes up)
>
> qmicli -d /dev/cdc-wdm0 --dms-set-operating-mode=low-power
>
> Then I bring it online again
>
> qmicli -d /dev/cdc-wdm0 --dms-set-operating-mode=online
>
> This command causes the modem to attach again. So then I stop the network
>
> qmicli -d /dev/cdc-wdm0  --wds-stop-network=disable-autoconnect
>
> Network cancelled... releasing resources
> [/dev/cdc-wdm0] Network stopped
>
> When I than try to setup the network mannually (not usin gqmi-network) I get
> the following message
>
> qmicli -d /dev/cdc-wdm0 --wds-start-network=apn='internet',ip-type=4
> --client-no-release-cid
>
> error: couldn't start network: QMI protocol error (26): 'NoEffect'
> [/dev/cdc-wdm0] Client ID not released:
>     Service: 'wds'
>         CID: '42'
>
> Which makes the following call fail.
>
> qmicli -d /dev/cdc-wdm0  --wds-get-current-settings
> error: couldn't get current settings: QMI protocol error (15): 'OutOfCall'

You need to wait for the device to register to a network.
Using --nas-get-serving-system to check that it says "registered" at
Registration state:
I suspect that is why you get NoEffect when you connect via
wds-start-network, and OutOfCall when you check settings.

I've noticed that MC7430 takes quite some time [ compared to MC73xx ]
to connect to a tower.
Not sure why though.

Alex

>
>
> Using the same set of commands I managed to get it working once. So I'm
> still not clear how I can reproduce the successfull case
>
> Thanks for any help
>
> Erik
>
>
>
>
>
>
> On 10/02/2017 10:45 PM, Bjørn Mork wrote:
>>
>> Aleksander Morgado <aleksander at aleksander.es> writes:
>>
>>> Ah, true... then no idea why it didn't allow updating that... first
>>> time I've seen this.
>>>
>>> Erik, can you manually run this?
>>> $ sudo -s
>>> # echo Y > /sys/class/net/wwan0/qmi/raw_ip
>>
>> The driver will refuse to change mode if the netdev is running.  I.e. if
>> the interface is up.  It should log an error and the write should return
>> -EBUSY in this case.
>>
>> The driver will also notify other drivers of the upcoming type change,
>> allowing them to block it.  This will prevent mode change if you have
>> added the wwanX device to a bridge for example (which isn't a good idea
>> for a raw ip device).  The sysfs write should still return an
>> appropriate error code.
>>
>>
>>
>>
>> Bjørn
>
>