Application note - fitlet2 Linux Mobile broadband configuration

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  • This application note provides an example for configuring SIMCOM SIM7100E/SIM5360E over Linux
  • This application note applies to fitlet2 with the above mentioned modems.

List of tested devices

  • The guide was tested on a systems with the specs listed below, but should be easily adaptable
  • NOTE: nmcli and mmcli tools used in the guide do not require X windows system and desktop environment, they work on servers as well
Device: fitlet2
CPU: Intel(R) Atom(TM) Processor E3950
BIOS: 05/14/2018 American Megatrends Inc. FLT2.
OS: Linux Mint 19 Tara
Kernel: 4.15.0-23-generic
Modem: SIM7100E
Device: fitlet2
CPU: Intel(R) Atom(TM) Processor E3950
BIOS: 05/14/2018 American Megatrends Inc. FLT2.
OS: CentOS 7
Kernel: 4.17.11-1.el7.elrepo.x86_64
Modem: SIM5360E

Detailed modem and SIM information

$ mmcli -m 0

/org/freedesktop/ModemManager1/Modem/0 (device id '58d13e091173f65e74b1b6ad29a0dd14f3e118a3')
  Hardware |   manufacturer: 'QUALCOMM INCORPORATED'
           |          model: 'SIMCOM_SIM7100E'
           |       revision: 'M9615A-CETWTBZM-6.0.15255  1  [May 13 2016 01:00:00]'
           |      supported: 'gsm-umts
           |                  lte
           |                  gsm-umts, lte'
           |        current: 'gsm-umts, lte'
           |   equipment id: '866802020708816'
  System   |         device: '/sys/devices/pci0000:00/0000:00:15.0/usb1/1-8/1-8.2'
           |        drivers: 'option1, qmi_wwan'
           |         plugin: 'SimTech'
           |   primary port: 'cdc-wdm0'
           |          ports: 'ttyUSB0 (qcdm), ttyUSB2 (at), cdc-wdm0 (qmi), wwp0s21f0u8u2i5 (net), ttyUSB3 (at)'
  Numbers  |           own : 'unknown'
  Status   |           lock: 'sim-pin2'
           | unlock retries: 'sim-pin (5), sim-pin2 (5), sim-puk (5), sim-puk2 (5)'
           |          state: 'registered'
           |    power state: 'on'
           |    access tech: 'umts'
           | signal quality: '41' (recent)
  Modes    |      supported: 'allowed: 2g, 3g, 4g; preferred: none'
           |        current: 'allowed: 2g, 3g, 4g; preferred: none'
  Bands    |      supported: 'dcs, egsm, u2100, u1800, u850, u900, eutran-i, eutran-iii, eutran-vii, eutran-viii, eutran-xx, eutran-xxxviii, eutran-xl'
           |        current: 'dcs, egsm, u2100, u900, eutran-i, eutran-iii, eutran-vii, eutran-viii, eutran-xx, eutran-xxxviii, eutran-xl'
  IP       |      supported: 'ipv4, ipv6, ipv4v6'
  3GPP     |           imei: '866802020708816'
           |  enabled locks: 'none'
           |    operator id: '42503'
           |  operator name: 'unknown'
           |   subscription: 'unknown'
           |   registration: 'home'
  SIM      |           path: '/org/freedesktop/ModemManager1/SIM/0'

  Bearers  |          paths: 'none'
$ mmcli -i 0
SIM '/org/freedesktop/ModemManager1/SIM/0'
  Properties |          imsi : '425030300567978'
             |            id : '8997250003005679782'
             |   operator id : '42503'
             | operator name : 'Rami Levy'

Configure cellular connection

  • Create new connection
$ sudo nmcli connection edit type gsm con-name "Rami Levi Mobile"

===| nmcli interactive connection editor |===

Adding a new 'gsm' connection

Type 'help' or '?' for available commands.
Type 'describe [<setting>.<prop>]' for detailed property description.

You may edit the following settings: connection, gsm, serial, ppp, ipv4, ipv6, tc, proxy
  • Edit the APN settings of your network. Comprehensive lists of major carriers and their settings can be found online:
  • NOTE: In most cases the only information required is the APN and sometimes a username and password – all other fields may be left at their defaults
nmcli> set gsm.apn internet.rl
nmcli> set gsm.username rl@3g
nmcli> set gsm.password rl
  • Review your APN and other settings with print command:
nmcli> print
                 Connection profile details (Rami Levi Mobile)
===============================================================================                          Rami Levi Mobile
connection.uuid:                        36fbc401-a3c8-4735-a404-fcbbc119943d
connection.stable-id:                   --
connection.type:                        gsm
connection.interface-name:              --
connection.autoconnect:                 yes
connection.autoconnect-priority:        0
connection.autoconnect-retries:         -1 (default)
connection.auth-retries:                -1
connection.timestamp:                   0                   no
connection.permissions:                 --                        --
connection.master:                      --
connection.slave-type:                  --
connection.autoconnect-slaves:          -1 (default)
connection.secondaries:                 --
connection.gateway-ping-timeout:        0
connection.metered:                     unknown
connection.lldp:                        default
ipv4.method:                            auto
ipv4.dns:                               --
ipv4.dns-search:                        --
ipv4.dns-options:                       ""
ipv4.dns-priority:                      0
ipv4.addresses:                         --
ipv4.gateway:                           --
ipv4.routes:                            --
ipv4.route-metric:                      -1
ipv4.route-table:                       0 (unspec)
ipv4.ignore-auto-routes:                no
ipv4.ignore-auto-dns:                   no
ipv4.dhcp-client-id:                    --
ipv4.dhcp-timeout:                      0 (default)
ipv4.dhcp-send-hostname:                yes
ipv4.dhcp-hostname:                     --
ipv4.dhcp-fqdn:                         --
ipv4.never-default:                     no
ipv4.may-fail:                          yes                       -1 (default)
ipv6.method:                            auto
ipv6.dns:                               --
ipv6.dns-search:                        --
ipv6.dns-options:                       ""
ipv6.dns-priority:                      0
ipv6.addresses:                         --
ipv6.gateway:                           --
ipv6.routes:                            --
ipv6.route-metric:                      -1
ipv6.route-table:                       0 (unspec)
ipv6.ignore-auto-routes:                no
ipv6.ignore-auto-dns:                   no
ipv6.never-default:                     no
ipv6.may-fail:                          yes
ipv6.ip6-privacy:                       -1 (unknown)
ipv6.addr-gen-mode:                     stable-privacy
ipv6.dhcp-send-hostname:                yes
ipv6.dhcp-hostname:                     --
ipv6.token:                             --
gsm.number:                             *99#
gsm.username:                           rl@3g
gsm.password:                           <hidden>
gsm.password-flags:                     0 (none)
gsm.apn:                                internet.rl                         --                                <hidden>                          0 (none)
gsm.home-only:                          no
gsm.device-id:                          --
gsm.sim-id:                             --
gsm.sim-operator-id:                    --
gsm.mtu:                                auto
proxy.method:                           none
proxy.browser-only:                     no
proxy.pac-url:                          --
proxy.pac-script:                       --
  • Supposing you're running as root, you'll now be able to save your connection and exit
nmcli> save
Saving the connection with 'autoconnect=yes'. That might result in an immediate activation of the connection.
Do you still want to save? (yes/no) [yes] yes
Connection 'Rami Levi Mobile' (36fbc401-a3c8-4735-a404-fcbbc119943d) successfully saved.
nmcli> quit
  • Review your connections info
$ nmcli
cdc-wdm0: connected to Rami Levi Mobile
	gsm (option1, qmi_wwan), hw, iface wwp0s21f0u8u2i5, mtu 1500
	ip4 default

eno1: unavailable
	"Intel I211 Gigabit"
	ethernet (igb), 00:01:C0:20:27:6C, hw, mtu 1500

enp1s0: unavailable
	"Intel I211 Gigabit"
	ethernet (igb), 00:01:C0:20:27:6B, hw, mtu 1500

lo: unmanaged
	loopback (unknown), 00:00:00:00:00:00, sw, mtu 65536

DNS configuration:
	interface: wwp0s21f0u8u2i5
  • That's all, you are connected