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# LTE-modem-config
Configuration of an LTE modem on the Raspberry Pi
-------------------------------------------------
[HUAWEI 4G Dongle E3372](https://consumer.huawei.com/za/routers/e3372/specs/) is an USB 2.0 device with a microSD card reader and a slot for a standard SIM Card
![Huawei-e3372-image](Huawei-e3372-image.jpg)
After plugging in the USB dongle check if Linux recognized it. E.g. `Huawei Technologies Co., Ltd. Modem/Networkcard`
`lsusb`
```
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 004: ID 04d9:0007 Holtek Semiconductor, Inc.
Bus 001 Device 005: ID 12d1:1506 Huawei Technologies Co., Ltd. Modem/Networkcard
Bus 001 Device 003: ID 2516:012f Cooler Master Co., Ltd.
Bus 001 Device 002: ID 2109:3431 VIA Labs, Inc. Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
```
Check if the driver created the modem device. You should see the `/dev/cdc-wdm0`
`ls /dev/cdc*`
```
/dev/cdc-wdm0
```
Install `Network Manager`
`sudo apt install network-manager`
Check modems avalable to the network manager
`mmcli --list-modems`
```
/org/freedesktop/ModemManager1/Modem/0 [huawei] E3372
```
Check status of the modem
`mmcli --modem=/org/freedesktop/ModemManager1/Modem/0`
```
--------------------------------
General | dbus path: /org/freedesktop/ModemManager1/Modem/0
| device id: 46c19d81068f7f5001140bf211de0b717b981698
--------------------------------
Hardware | manufacturer: huawei
| model: E3372
| revision: 21.200.07.00.55
| supported: gsm-umts
| current: gsm-umts
| equipment id: 861821033381192
--------------------------------
System | device: /sys/devices/platform/scb/fd500000.pcie/pci0000:00/0000:00:00.0/0000:01:00.0/usb1/1-1/1-1.3
| drivers: option1, huawei_cdc_ncm
| plugin: Huawei
| primary port: ttyUSB1
| ports: ttyUSB0 (at), ttyUSB1 (at), cdc-wdm0 (at), wwan0 (net)
--------------------------------
Status | unlock retries: sim-pin (3), sim-pin2 (3), sim-puk (10), sim-puk2 (10)
| state: connected
| power state: on
| access tech: lte
| signal quality: 70% (recent)
--------------------------------
Modes | supported: allowed: 2g; preferred: none
| allowed: 3g; preferred: none
| allowed: 4g; preferred: none
| allowed: 2g, 3g, 4g; preferred: none
| current: allowed: 2g, 3g, 4g; preferred: none
--------------------------------
IP | supported: ipv4
--------------------------------
3GPP | imei: 861821033381192
| operator id: 23101
| operator name: Orange
| registration: home
--------------------------------
3GPP EPS | ue mode of operation: csps-2
--------------------------------
SIM | dbus path: /org/freedesktop/ModemManager1/SIM/0
--------------------------------
Bearer | dbus path: /org/freedesktop/ModemManager1/Bearer/0
```
Check the SIM card status
`mmcli --sim=/org/freedesktop/ModemManager1/SIM/0`
```
---------------------------
General | dbus path: /org/freedesktop/ModemManager1/SIM/0
---------------------------
Properties | imsi: 231014462647671
| iccid: 8942101180024842166
| operator id: 23101
| operator name: Orange
```
Create configuration for the modem. Set `con-name 'Orange-LTE'` to any name and `apn 'internet'` to the APN name of your mobile provider
`sudo nmcli connection add type gsm ifname '*' con-name 'Orange-LTE' apn 'internet' connection.autoconnect yes`
The configuration file is created as the con-name with the .nmconnection as the suffix
`ls /etc/NetworkManager/system-connections/`
```
Orange-LTE.nmconnection
```
Check status of the network device `wwan0`. It should have an IP address assigned by your mobile provider (e.g. 10.121.79.142)
`ip a`
```
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: eth0: <NO-CARRIER,BROADCAST,MULTICAST,UP> mtu 1500 qdisc mq state DOWN group default qlen 1000
link/ether dc:a6:32:e0:60:e1 brd ff:ff:ff:ff:ff:ff
3: wlan0: <BROADCAST,MULTICAST> mtu 1500 qdisc pfifo_fast state DOWN group default qlen 1000
link/ether fa:aa:97:2d:7f:0e brd ff:ff:ff:ff:ff:ff
4: wwan0: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UNKNOWN group default qlen 1000
link/ether 00:1e:10:1f:00:00 brd ff:ff:ff:ff:ff:ff
inet 10.121.79.142/30 brd 10.121.79.143 scope global noprefixroute wwan0
valid_lft forever preferred_lft forever
inet 169.254.62.145/16 brd 169.254.255.255 scope global noprefixroute wwan0
valid_lft forever preferred_lft forever
```
Check if the internet is reachable
`ping -I wwan0 www.google.com -c 5`
```
PING www.google.com (142.251.37.100) from 10.121.79.142 wwan0: 56(84) bytes of data.
64 bytes from prg03s13-in-f4.1e100.net (142.251.37.100): icmp_seq=1 ttl=117 time=23.5 ms
64 bytes from prg03s13-in-f4.1e100.net (142.251.37.100): icmp_seq=2 ttl=117 time=36.9 ms
64 bytes from prg03s13-in-f4.1e100.net (142.251.37.100): icmp_seq=3 ttl=117 time=32.7 ms
64 bytes from prg03s13-in-f4.1e100.net (142.251.37.100): icmp_seq=4 ttl=117 time=43.7 ms
64 bytes from prg03s13-in-f4.1e100.net (142.251.37.100): icmp_seq=5 ttl=117 time=29.7 ms
--- www.google.com ping statistics ---
5 packets transmitted, 5 received, 0% packet loss, time 11ms
rtt min/avg/max/mdev = 23.539/33.298/43.704/6.781 ms
```