help needed to use a Sierra Wireless MC7354 3G modem with a Raspberry Pi3 running Angstrom v2016.12 - Kernel 4.4.35

Hello Aleksander,


Thank you for directing me to the NetworkManager mailing list.


Here is my situation.

I want to use NetworkManager to create a 3G connection using ModemManager and the qmi_wann driver.

libqmi 1.16.0

mmcli 1.6.4

nmcli 1.0.12


I have had success issuing the commands below along with other commands using mmcli and qmicli.

qmicli -d /dev/cdc-wdm0 --wds-start-network=apn=''  --client-no-release-cid

mmcli -m 0

mmcli -m 0 --simple-connect=""


I think the problem lies with NetworkManager:

root@raspberrypi3:/# nmcli con show

NAME                UUID                                  TYPE            DEVICE

Wired connection 1  bdc6b7b3-1e60-453c-bfca-11ce7519826d  802-3-ethernet  eth0  

cellular            bd4fbd79-329c-4af2-a68d-a330df553abd  gsm             --    



cellular was created with:

nmcli connection add type gsm con-name cellular ifname wwan0 apn


But my wwan0 interface shows “unmanaged” and I cannot bring it up:

root@raspberrypi3:/# nmcli con up cellular ifname wwan0

Error: device 'wwan0' not compatible with connection 'cellular'.


root@raspberrypi3:/# nmcli device status


eth0    ethernet  connected  Wired connection 1

lo      loopback  unmanaged  --                

wwan0   wwan      unmanaged  --

The newly created cellular connection appears in system-connections:

root@raspberrypi3:/etc/NetworkManager/system-connections# ls



Interesting, the eth0 Wired connection 1 is not shown in that directory, nor can I find a definition for it. An interfaces file does not exist.

root@raspberrypi3:/# find . -iname "interfaces"



If you are available to assist I would appreciate hearing back from you.


Many thanks!

- Phil

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