I'm trying to connect a Telit LEU910C1-EU modem to get a data connection (over LTE). The module is used via a CM3, the modem itself is plugged into a usb hub. While tinkering around I got the following weird behavior:
- On a Ubuntu Laptop, I can use the modem just fine with ModemManager and NetworkManager. (see below for exact steps)
- On the Pi though I seem to get no errors and NetworkManager tells me I'm connected.
When doing a
ping -I wwan0 22.214.171.124though it blocks indefinitely.
I already tried many different SIMs (including the one in my smartphone) and even swapped the modem. One weird thing is also that the whole Pi seems to be unresponsive for a few seconds after starting the ModemManager and sometimes the ethernet doesn't seem to be working anymore after.
I tried to summarize all important logs in this Gist:
(This include all relevant software version, they are the same as on on the Ubuntu laptop, except the kernel).
Those are the steps I use to setup the modem itself:
$ sudo systemctl start ModemManager $ sudo systemctl start NetworkManager # Check if the modem was recognized: $ mmcli -L # Check the status of the modem, if it shows "registered", continue. $ mmcli -m 0 # Actually add the connection: $ sudo nmcli c add type gsm ifname cdc-wdm0 con-name telit apn bicsapn # Test the connction. This will block forever or yield "not reachable" $ ping -I 126.96.36.199
Did anyone have similar issues or can help debug that further?