ModemManager

ModemManager is a service that automatically sets up and connects 2G/3G/4G/5G modems and provides a high level of abstraction when interacting with modems.

A few examples of functionality offered by ModemManager are:

  • initialisation of the modem
  • connecting to the Internet
  • sending/receiving SMS
  • firmware upgrades for select QMI-based modems.

In menuconfig, ModemManager is located under the Network section.

You probably need to include the kernel module for your modem in your firmware image, or on running firmware via opkg.

Common ones which should get most modems working to some extent are:

opkg update && opkg install kmod-usb-serial kmod-usb-net kmod-usb-serial-wwan kmod-usb-serial-option kmod-usb-net-qmi-wwan kmod-usb-net-cdc-mbim

ModemManager supports MBIM modems. You can include MBIM support by selecting it under the Configuration section in ModemManager's menuconfig entry.

ModemManager supports QMI modems. You can include QMI support by selecting it under the Configuration section in ModemManager's menuconfig entry.

ModemManager abstracts the configuration of your modems into standard Linux network interfaces. The example below illustrates a typical configuration:

/etc/config/network

config interface 'broadband'
    option device   '/sys/devices/platform/soc/20980000.usb/usb1/1-1/1-1.2/1-1.2.1'
    option proto    'modemmanager'
    option apn      'ac.vodafone.es'
    option username 'vodafone'
    option password 'vodafone'
    option pincode  '7423'
    option lowpower '1' 

The available options are

optiontyperequireddescription
devicestringXFull sysfs path of the device, for example /sys/devices/platform/soc/20980000.usb/usb1/1-1/1-1.2/1-1.2.1. Do not use /dev/cdc-wdm0.
apnstringXThe GPRS Access Point Name specifying the APN used when establishing a data session with the GSM-based network
allowedauthlist(string) Authentication method to use. A list of none, pap, chap, mschap, mschapv2, eap
usernamestring The username used to authenticate with the network, if required
passwordstring The password used to authenticate with the network, if required
pincodestring If the SIM is locked with a PIN it must be unlocked before any other operations are requested
iptypestringXipv4v6 or ipv4 or ipv6
signalrateint Signal refresh rate to signalrate second (see mmcli –signal-setup)
lowpowerboolean See mmcli –set-power-state-low

It is possible to install luci-proto-modemmanager to configure an interface with ModemManager protocol via Luci.

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  • Last modified: 2022/05/03 06:53
  • by andrewz