primary device changing from boot to boot

[Pičugins Arsenijs]

I don't know if it's going to help you with this issue, but if you can hardcode a path to the serial port somewhere, take a look in the "/dev/serial/by-id" directory - it has symlinks to /dev/tty* entries that correspond to hardware serial ports currently connected. Names of the symlinks are generated from some kind of hardware IDs, so should be the same, no matter the order of enumeration (unless your hardware doesn't expose an unique ID that udev, or whatever makes those symlinks, could use)

>05.09.2017, 19:39, "Tim Harvey" <tharvey at gateworks.com>:
>
> Dan,
>
> This makes sense, but how do I configure NetworkManager to use the
> device-id? I don't see it as an available option for type gsm, so
> perhaps I need to edit the file in
> /etc/NetworkManager/system-connections/mymodem and add it to the 'gsm'
> section but maybe I've got larger issues because nm seems to not even
> like ttyACM0 for the interface:
>
> root at ventana:~# mmcli -m 0
>
> /org/freedesktop/ModemManager1/Modem/0 (device id
> '6909b49a4d44867387a2b09b8095c579e031874c')
>   -------------------------
>   Hardware | manufacturer: 'Sierra Wireless'
>            | model: 'HL7588'
>            | revision: 'RHL75xx.V.3.7.151600.201702071034.x7160_1'
>            | supported: 'gsm-umts, lte'
>            | current: 'gsm-umts, lte'
>            | equipment id: '014284000070452'
>   -------------------------
>   System | device:
> '/sys/devices/soc0/soc/2100000.aips-bus/2184200.usb/ci_hdrc.1/usb2/2-1'
>            | drivers: 'cdc_acm, cdc_ncm'
>            | plugin: 'Generic'
>            | primary port: 'ttyACM0'
>            | ports: 'wwx000011121314 (net), ttyACM0 (at),
> wwx000011121316 (net), wwx00001112131a (net), wwx000011121318 (net),
> ttyACM2 (at)'
>   -------------------------
>   Numbers | own : '+19529136397'
>   -------------------------
>   Status | lock: 'none'
>            | unlock retries: 'unknown'
>            | state: 'enabled'
>            | power state: 'on'
>            | access tech: 'unknown'
>            | signal quality: '0' (cached)
>   -------------------------
>   Modes | supported: 'allowed: 2g, 3g, 4g; preferred: none'
>            | current: 'allowed: 2g, 3g, 4g; preferred: none'
>   -------------------------
>   Bands | supported: 'unknown'
>            | current: 'unknown'
>   -------------------------
>   IP | supported: 'ipv4, ipv6, ipv4v6'
>   -------------------------
>   3GPP | imei: '014284000070452'
>            | enabled locks: 'none'
>            | operator id: 'unknown'
>            | operator name: 'unknown'
>            | subscription: 'unknown'
>            | registration: 'idle'
>   -------------------------
>   SIM | path: '/org/freedesktop/ModemManager1/SIM/0'
>
>   -------------------------
>   Bearers | paths: 'none'
>
> root at ventana:~# dbus-send --print-reply --system \
>    --dest=org.freedesktop.ModemManager1 \
>    /org/freedesktop/ModemManager1/Modem/0 \
>    org.freedesktop.DBus.Properties.Get \
>    string:org.freedesktop.ModemManager1.Modem string:DeviceIdentifier
> method return time=1504629466.392532 sender=:1.3 -> destination=:1.25
> serial=31 reply_serial=2
>    variant string "6909b49a4d44867387a2b09b8095c579e031874c"
>
> root at ventana:~# nmcli --version
> nmcli tool, version 1.2.6
>
> root at ventana:~# nmcli device status
> DEVICE TYPE STATE CONNECTION
> eth0 ethernet disconnected --
> ttyACM0 gsm unavailable --
> can0 can unmanaged --
> lo loopback unmanaged --
>
> root at ventana:~# nmcli connection add type gsm ifname ttyACM0 con-name
> mymodem apn vzwinternet
> Connection 'mymodem' (ce87bf21-f700-4c61-8165-dda4b6c44ea8) successfully added.
>
> nmcli connection add type gsm ifname ttyACM0 con-name mymodem apn vzwinternet
>
> root at ventana:~# nmcli connection up mymodem
> Error: Connection activation failed: No suitable device found for this
> connection.
> ^^^^^^ not sure why ttyACM0 isn't acceptable here
>
> Thanks,
>
> Tim
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