This article was tested on Turris 1.x and Turris Omnia.
What do you need to have?
Firmware versions beginning with 21.xxx.xx.xx.xx not 22.xxx.xx.xx.xx
advanced configuration interface LuCI
In this article I will show you how to configure LTE USB modem Huawei E3372.
Also I will also show you how to have mobile broandband as backup connection (failover).
Information about used LTE USB modem (which you can find by using SSH):
root@turris:~# lsusb Bus 001 Device 010: ID 12d1:1506 Huawei Technologies Co., Ltd. E398 LTE/UMTS/GSM Modem/Networkcard
Now, please also verify if you have two interfaces
ttyUSB1 (again you will need to use SSH)
root@turris:~# dmesg | grep tty [ 1842.406646] usb 1-1.2: GSM modem (1-port) converter now attached to ttyUSB0 [ 1842.407133] usb 1-1.2: GSM modem (1-port) converter now attached to ttyUSB1
Why they are two interfaces?
“Most of these fallback compositions are intended for dongle firmware update and usually contains 2 serial interfaces, it just so happens that one of the interfaces is connected to the device internal ppp server which means we can use it for dial-up.”
LuCI you will need to add new interface.
Add new interface
I recommend to use
lte as name of the new interface.
and set protocol to
Now click to
Modem device field choose there
/dev/ttyUSB1 and in
Service type choose
To the field
APN your's mobile operator should tell you, what needs to be there. Usually it is something like
The last thing, which you will need to enter it depends if your SIM card has PIN code. If it has fill it in. When it doesn't leave it empty.
Please be careful to PIN code. After 3 failed attempts the SIM card is blocked and you will need to unblock it with PUK code.
Now click to the button
Save and go to
You will need to set the
wan firewall zone.
Save & Apply.
Now you should see how KB moves in RX and TX. You can also check it by disconnecting WAN cable.
Now if everything went well all your traffic between the router and the Internet should go through the LTE interface. That means that the connection through the WAN interface will not work. In the next step I will show you how to configure LTE as a backup connection.
Please go here, where it is explained: https://www.turris.cz/doc/en/howto/multiwan
Tested only on Turris 1.x. Should be similar to Turris Omnia.
When you have inserted microSD card to LTE modem, which is connected to the Turris router, you will need to check if router sees microSD card in LTE modem.
I will use SSH:
You should see similar output as I do.
root@turris:~# blkid /dev/mtdblock3: TYPE="squashfs" /dev/mmcblk0: PTUUID="3fee9afa" PTTYPE="dos" /dev/mmcblk0p1: SEC_TYPE="msdos" UUID="3462-1AE5" TYPE="vfat" PARTUUID="3fee9afa-01" /dev/mmcblk0p2: UUID="1acf499c-1067-4fe1-b1b7-af7dc884f7ae" UUID_SUB="fd211a80-da78-49fc-a7c2-f2ed2b840301" TYPE="btrfs" PARTUUID="3fee9afa-02" /dev/sda1: UUID="ED37-A894" TYPE="exfat"
Now we can see that microSD mounted is detected as
dev/sda and their type is:
By this command you can format it to ext4 file system
You can also use
LuCI to add new mount point in
(Turris 1.x owners can't add it through LuCI and will need to mount it manually)
or you can mount it manually
If you would like to have microSD card in folder
sd, which will be located in
First you will need to create folder
mount /dev/sda1 /mnt/sd
Now I will show you how to verify, if sd card is mounted how we wanted.
root@turris:~# df -h
Filesystem Size Used Available Use% Mounted on /dev/mmcblk0p2 119.1G 136.5M 118.0G 0% / tmpfs 1011.5M 1.7M 1009.8M 0% /tmp tmpfs 512.0K 4.0K 508.0K 1% /dev /dev/sda1 116.8G 60.0M 110.8G 0% /mnt/sd
For editing files I used on Windows these two apps WinSCP and PSPad.
Source: Thanks to Nora Kořánová, because she made article for Quectel EC20