I'm trying to get a u-blox LARA-R280 device working with my embedded linux build -- using Linux kernel 4.4.0 (armhf) and Debian Buster (testing).
* ModemManagerv 1.10.0 * NetworkManager 1.14.6 ModemManager discovers the device ok, but NetworkManger does not see a network device (e.g. `cdc-wdm0` which is what I get with a Quectel modem). # mmcli -L /org/freedesktop/ModemManager1/Modem/0 [u-blox] LARA-R280 # mmcli -m 0 -------------------------------- General | dbus path: /org/freedesktop/ModemManager1/Modem/0 | device id: cefae5a09feceda70ab244f864cd3239d518b487 -------------------------------- Hardware | manufacturer: u-blox | model: LARA-R280 | revision: 30.43 | supported: gsm-umts, lte | current: gsm-umts, lte | equipment id: 357364080026759 -------------------------------- System | device: /sys/devices/soc0/amba/e0002000.usb/ci_hdrc.0/usb1/1-1 | drivers: cdc_acm | plugin: u-blox | primary port: ttyACM0 | ports: ttyACM3 (unknown), ttyACM4 (unknown), ttyACM5 (unknown), | ttyACM0 (at), ttyACM1 (at), ttyACM2 (at) -------------------------------- Status | unlock retries: sim-pin (3), sim-pin2 (3), sim-puk (10), sim-puk2 (10) | state: registered | power state: on | access tech: lte | signal quality: 60% (recent) -------------------------------- # nmcli d DEVICE TYPE STATE CONNECTION eth0 ethernet connected wired-connection-1 ttyACM0 gsm disconnected -- sit0 iptunnel unmanaged -- tunl0 iptunnel unmanaged -- lo loopback unmanaged -- `nmcli` shows a `ttyACM0` serial device (instead of the network interface device). I'm expecting something like `cdc-wdm0`. Is that a correct assumption? I hand to Monkey patch my kernel to work with the Quectel device (following documents from Quetel), but I can't find any information from u-blox about kernel driver requirements (other than the device works with standard linux drivers). Any ideas what drivers I need configured/enabled/patched to get the LARA-R2 module to enumerate as a network device? Thanks, Brendan.
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