13
votes
Difference between PPP, QMI and AT commands
A LTE modem can be presented to the operating system in several ways. The legacy way is to emulate a legacy analog modem: in that case, the modem will present one serial (TTY) interface (/dev/ttyUSB0),...
- 114k
5
votes
Get power consumption of a USB device
$ watch -n1 'lsusb -v|egrep "^Bus|MaxPower"'
And refresh every second
Cada 1,0s: lsusb -v|egrep "^Bus|MaxPower" Mecaro: Fri Dec 1 00:15:54 2017
Couldn't open device, ...
- 59
2
votes
Accepted
Decode LTE RRC message (hexdump) using Tshark
I figured it out; it turns out I was just using the wrong string for the payload protocol. I saw that tshark -G protocols returned lte_rrc as an option, so I thought that would be sufficient, but it ...
- 844
2
votes
Accepted
How to automatically load a new VID&PID to module usb_serial
Assuming your device's vendor and product IDs are as configured above, ie 03f0 and 581d respectively, you can create a udev rule that will automatically initialize the device and bind it to libqmi, as ...
- 145
1
vote
multiple VPN connections from the same device
You have two interfaces, wwan0 and wwan1, and you want traffic from each to route through its respective VPN tunnel (tun0 and tun1). You need to set up routing rules to ensure that traffic from wwan0 ...
- 11
1
vote
USB LTE modem "Brovi E3372-325" not working
In my case I needed to make 3 things to make it work:
remove the PIN from the SIM card
use modprobe option and write to /sys/bus/usb-serial/drivers/option1/new_id as described in one of the messages ...
- 111
1
vote
Accepted
USB LTE modem "Brovi E3372-325" not working
I found a solution that works: https://www.draisberghof.de/usb_modeswitch/bb/viewtopic.php?f=3&t=3043&p=20026#p20054
/etc/udev/rules.d/40-huawei.rules:
# This is part of USB_ModeSwitch version ...
- 111
1
vote
USB LTE modem "Brovi E3372-325" not working
Same gizmo, same setup, same problem here.
However, today I played a bit more with that and I got that actually working.
Basically the steps were:
Ubuntu 22.04 with latest updates
once up & ...
- 11
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