23
votes
Accepted
configure gsm connection using nmcli
A bit late to the party, but I was stuck at the same hurdle. Since I have worked it out I thought I'd share my findings as every other post on the topic is about as clear as mud.
Although ...
- 396
9
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),...
- 97.1k
8
votes
Accepted
How do I spoof different device ID for the purposes of Linux device management?
You can see the module(s) that would be loaded for USB device with vendor:product IDs 1199:9079 with:
sudo modprobe -c | grep usb:v1199p9079
The results will be similar to:
alias usb:v1199p9079d*dc*...
- 97.1k
6
votes
How to disable PIN on a SIM card?
The following commands will allow you to remove SIM CODE from SIM card
screen /dev/USB0 Let's assume you have a modem on /dev/ttyUSB0 (check dmesg when you plug your usb to ensure that)
The ...
- 171
6
votes
How to get address of connected USB modem?
Probably too late, but it might help others. Wouldn't help you to use mmcli from ModemManager?
$ mmcli -L
Found 1 modems:
/org/freedesktop/ModemManager1/Modem/4 [Lenovo] H5321 gw
$ mmcli -m 4
...
- 1,463
5
votes
Accepted
USB LTE modem without MAC address?
If I'm not mistake, I don't use RNDIS right now.
RNDIS is a Windows-specific network interface driver API. Um, that as nothing to do with what you're doing, right?
What might be the reason, that ...
- 29.5k
4
votes
configure gsm connection using nmcli
It's a year later now and a lot of packages are updated. Using the ModemManager service and mmcli I was able to initialise my ublox SARA-U201. ModemManager already made the connection called "mymodem"....
- 141
4
votes
Accepted
Mobile broadband repeatedly connects/disconnects
Okay, I've finally after years of immense frustration managed to solve the problem, which is that NetworkManager is just really buggy about modems. In fact, recently it has gotten worse and even ...
- 5,267
4
votes
Accepted
?z waiting to receive.**B0100000023be50 when I use rz to upload file
What you are seeing is the request (from rz) to its remote side (yours) to initiate a ZMODEM upload.
The obvious questions here would be: Are you using a ZMODEM-capable terminal? Are you starting a ...
- 28.9k
4
votes
qmicli Cannot set expected data format
Just a silly mistake, I forgot to take the interface down before I execute the command to set the expected format to raw-ip.
- 191
4
votes
How to get audio in and out of Huawei GSM modems when doing a voice call?
After placing or receiving a call, audio output on the serial device needs to be enabled (each time for each call) by issuing
AT^DDSETEX=<number>
(for my devices, only AT^DDSETEX=2 is ...
- 1,841
4
votes
Accepted
GSM modem - get signal strength
GSM modems can be controlled by a number of different protocols. Because of this, NetworkManager uses a second component called ModemManager to interface with them.
On my system, I can do this:
$ ...
- 97.1k
4
votes
How to verify modem is a fax modem?
Partial answer:
Googling for modem drivers for this laptop finds this, which offers an "LSI HDA" driver. Googling for "LSI HDA" indicates that it really seems to be a "High-...
- 32.4k
3
votes
Accepted
How do you remove Mobile Broadband Networks from the Gnome menu bar?
After some digging around and some questions in IRC someone pointed out that these connections come from paired bluetooth devices.
Simply running:
bluetoothctl
Brings up a list of all paired ...
- 230
3
votes
Accepted
getting "bad init string" when dialing with wvdial
This wvdial.conf worked on ZTE 3G Modem below:
[Dialer Defaults]
Modem = /dev/ttyUSB0
Init1 = ATZ
Init3 = AT+CGDCONT=1,"IP","apnname"
Phone = *99***1#
Username = user
Password = user
New PPPD = ...
- 167
3
votes
Accepted
Convert sound encoded in RTTY 45.45 baud using minimodem
I'm not familiar with minimodem, but found the following eventually worked:
minimodem -a --rx rtty --stopbits 1 -f new1ch.wav
which produces output like
### CARRIER 45.45 @ 740.0 Hz ###
SET YOUR ...
- 51.5k
3
votes
Accepted
SSH over incoming call from faxmodem possible?
There are getty implementations which support this directly, for example Mgetty (which should be available in your distribution). This will handle the modem on the server side, waiting for calls, ...
- 437k
3
votes
Accepted
Linux ppp0 and default route and how to reach public internet
Facing a similar issue,
sudo route add default ppp0
worked for me.
If you need the process automated, you can create a script in /etc/ppp/ip-up.d, it will be executed when the connection is set.
- 46
2
votes
getting "bad init string" when dialing with wvdial
I experienced the same problem, then found that I did not have a SIM card in the device.
When I added the SIM card, it worked again.
Perhaps the SIM card is locked?
I have seen other postings that ...
- 149
2
votes
How to send AT commands to a modem in Linux?
Try this:
echo AT | socat - /dev/ttyUSB1,crnl
This sends an AT command, returns the output and finally exits.
The linux command can be used for several AT commands in script with a delay of 1 second ...
- 21
2
votes
Endless data loop from dev/ttyUSB while sending AT commands
Use "ATE0" Before
echo "ATE0" > /dev/ttyUSB0
2
votes
List serial devices on FreeBSD
Use pstat(8). It will show you all the terminals, from which you can then subtract the virtual terminals (ttyv*) and ptys, leaving the serial ones - in this case ttyu0 and ttyu1, as documented in ...
- 1,448
2
votes
Is there a way to figure out a modem/router web IP address?
It's a little unclear what you want, but here goes:
ping usually shows what ip it's using. That might be the address on your LAN side of the router, but that is most likely what you need.
If you're ...
2
votes
Accepted
SFK to convert text to sound with minimodem?
A naive answer to this question is:
cat example.txt | minimodem --write 1200 -f converted-example.wav
After the generation, you may check with this command
minimodem --read 1200 -f converted-...
- 36
2
votes
Accepted
How do I configure APN settings on my QMI-based 4G modem?
So 4G/LTE modems provide a set of usb cdc emulated ethernet interfaces, including DHCP, and then provide a usbmic device for cell modem specific configuration activity, as well as the classic AT /...
- 36
2
votes
Accepted
Data and control channels for a modem in Linux?
Devices which use the AT-style modem “interface” operate in a number of states:
command mode
dialing mode
handshake mode
data mode
Modems start in command mode, and respond to AT-prefixed commands. ...
- 437k
2
votes
How do I make ppp reliable over lossy radio modems using pppd and tcp kernel settings on debian?
As a partial answer to my own question, I have made significant reliability improvements through the following:
Changing the tcp_congestion_control kernel plugin from the default cubic to bbr has ...
- 81
2
votes
Accepted
Internet via audio?
You should be able to do it with SLIP.
Check out this project log from someone doing exactly that: https://xenoworld.de/knowledge/slip.html
- 36
2
votes
Using Modem in Linux Mint
It's a 3-in-1 device that can work as:
A 4G USB dongle connected to a PC or laptop
A 4G USB WiFi cellular router/hotspot,
USB flash drive when adding a MicroSD card.
For the first feature, you will ...
- 4,726
1
vote
"Level 2 halted" error message using ldattach with mux type GSM0710
Did you issue a command like AT+CMUX=0 to the modem to trigger the mux in the first place?
The mux stuff isn't working, that's why you're getting that error message. The kernel driver and AT command ...
- 11
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