30
votes
How to connect to a serial port as simple as using SSH?
Try http://tio.github.io
"tio" is a simple TTY terminal application which features a straightforward commandline interface to easily connect to TTY devices for basic input/output.
Typical use is ...
- 401
26
votes
reading from serial from linux command line
I am monitoring output for arduino uno like:
screen /dev/ttyUSB0 9600
- 261
23
votes
How to send data to a serial port and see any answer?
This could be a better approach:
stty -F /dev/ttyUSB0 115200 raw -echo #CONFIGURE SERIAL PORT
exec 3</dev/ttyUSB0 #REDIRECT SERIAL OUTPUT TO FD 3
cat <&3 > /tmp/...
- 331
22
votes
How to send data to a serial port and see any answer?
Programs that talk to serial devices:
picocom
minicom
socat
or from shell you can do:
stty -speed 19200 < /dev/ttyS0 # sets the speed of the port
exec 99<>/dev/ttyS0 (or /dev/ttyUSB0...etc)...
- 583
21
votes
How to connect to a serial port as simple as using SSH?
This script is based on another answer, but sends everything over the serial port (except Ctrl+Q), not just single commands followed by Enter. This enables you to use Ctrl+C or Ctrl+Z on the remote ...
- 718
19
votes
Accepted
Find and kill the process that is using a serial port
killall expects a substring of the program's name as argument. To kill a process by its process ID, use kill.
You can directly kill all the processes that have a file open with the command fuser.
...
15
votes
command to determine ports of a device (like /dev/ttyUSB0)
Assuming that you know what the device you plugged in is, in 14.04 Ubuntu, at least, there is the command usb-devices that you can look through and find the information:
$ usb-devices
T: Bus=01 Lev=...
- 271
14
votes
How to bind USB device under a static name?
The multiple-identical-USB-device problem
I have a Rasperry Pi with four cameras. I take pix with fswebcam which identifies the cameras as /dev/video0 .. video3. Sometimes the camera is video0, ...
- 269
14
votes
terminate screen monitoring serial port
I run all my terminals inside a screen, and also sometimes use screen to connect to serial. If you screen /dev/ttyUSB0 inside screen, you'll just get a new window in your current session, not a new ...
- 270
13
votes
Accepted
Switch tabs in Debian installer over serial console with PuTTy
It looks like the Debian installer might use the well-known screen utility to implement multiple tabs on a serial console, so use its key combinations to switch tabs:
Ctrl+A, then 1-4
An alternative ...
- 103k
13
votes
extra \x0D appended when echo \0x0A
If you want bytes to be transmitted as-is across a serial connection both ways, you need to tell the system it's not to be used as a terminal device, either by detaching the tty line discipline from ...
- 559k
12
votes
Accepted
extra \x0D appended when echo \0x0A
You need to disable newline conversion:
stty -F /dev/ttyS2 -onlcr
or, for strict POSIX stty:
stty -onlcr < /dev/ttyS2
- 450k
10
votes
How can I monitor serial port traffic?
interceptty does that job:
interceptty /dev/ttyACM0 /dev/ttyDUMMY
or, with a nice output format and with configuring the backend device, and with line buffering:
interceptty -s 'ispeed 19200 ospeed ...
- 1,881
9
votes
How to use virtual serial port without root privileges?
I found an answer after pouring through the man page for socat.
You can add mode and group to the attributes of your pty by adding a few more expressions to your command line. To follow your example, ...
- 91
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),...
- 103k
8
votes
Cloning/Splitting a serial port (COM) port in Ubuntu
While a previous answer said it cannot be shared, this is partly wrong.
A linux TTY port can be opened with different applications ( if they don't use or check for locks), however data will be ...
- 121
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*...
- 103k
7
votes
How can I monitor serial port traffic?
This is the way I finally choose
Thanks to Gilles's answer!
strace -s 9999 -e read -ffp $(sed '/ttyUSB0/s/^.*proc.\([0-9]\+\).fd.*/\1/p;d' <(ls -l /proc/[1-9]*/fd/* 2>/dev/null)) |& perl -e '...
7
votes
How can minicom "permanently" translate incoming newline (\n) to CR+LF?
ANSWER:
In minicom press Ctrl+A Z. This will show the menu. Then press U ("Add Carriage Ret"), and minicom will add the CR symbol to each LF symbol automatically.
You may want to do that again in ...
- 191
7
votes
Accepted
reading serial port parameters from the terminal
Use stty instead:
stty -F /dev/ttyS0 -a
Example output:
speed 9600 baud; rows 0; columns 0; line = 0;
intr = ^C; quit = ^\; erase = ^?; kill = ^U; eof = ^D; eol = <undef>; eol2 = <undef>...
- 2,930
7
votes
Accepted
QEMU more than 4 serial ports
recompiling seems to work for all 8 ports.
1) linux-host limitation solved by: /etc/default/grub: 8250.nr_uarts=8 ... update grub
2) qemu limitation solved by:
git clone git://git.qemu-project.org/...
- 510
7
votes
Switch tabs in Debian installer over serial console with PuTTy
In addition to @telcoM answer:
For those running the Debian installer through screen itself, like a UART connection to some monitor-less device, you can't use Ctrl+a directly. That would be picked up ...
- 171
7
votes
Simulating an input from ttyS0 in Linux
TIOCSTI is available, but that's not a highly regarded mechanism nowadays. An alternative is very simple: this is what pseudo-terminals do. Just point the scanner at a pseudo-terminal instead of the ...
- 69.9k
6
votes
How to connect to a serial port as simple as using SSH?
Another issue that can occur is that your user account may need to set to the "dialout" group to access the serial port.
sudo usermod -a -G dialout $USER
- 161
6
votes
command to determine ports of a device (like /dev/ttyUSB0)
I found @phemmer's accepted answer regularly helpful and turned it into a bash script. I added shell process backgrounding to make it run a bit faster for lots of USB devices connected to a system (...
- 91
6
votes
Testing QinHeng Electronics HL-340 USB-Serial adapter
lsusb lists the device here as
Bus 003 Device 002: ID 1a86:7523 QinHeng Electronics HL-340 USB-Serial adapter
It is often shipped together with the sds011 sensor.
The required kernel module is ...
- 4,168
6
votes
Accepted
How to monitor a serial connection @ 250000 baud?
There are some undocumented ioctls you can use to set non-standard speeds, provided the driver implements them. A simple way to call them is with a small piece of python. Eg put in file mysetbaud.py ...
- 52.3k
6
votes
Accepted
How to set custom permissions on /dev/ttyS0 so that they persist after reboot?
you can check the group owner of /dev/ttyS0 with:
ls -l /dev/ttyS0
and then add your user in this group:
usermod -a -G {group-name} username
- 593
Only top scored, non community-wiki answers of a minimum length are eligible