linux null modem emulator v1.3
This is the tty0tty directory tree:
module: linux kernel module null-modempts: null-modem using ptys (without handshake lines)debian: debian package build tree
When run connect two pseudo-ttys and show the connection names:
(/dev/pts/1) <-> (/dev/pts/2)
the connection is:
TX -> RX
RX <- TX
The module is tested in kernels from 3.10.2 to 5.3.15 (debian)
When loaded, create 8 ttys interconnected:
/dev/tnt0 <-> /dev/tnt1
/dev/tnt2 <-> /dev/tnt3
/dev/tnt4 <-> /dev/tnt5
/dev/tnt6 <-> /dev/tnt7
the connection is:
TX -> RX
RX <- TX
RTS -> CTS
CTS <- RTS
DSR <- DTR
CD <- DTR
DTR -> DSR
DTR -> CD
The fastest and safest way to install tty0tty dkms module on Debian is to use the APT repository from piduino.org, so you should do the following :
wget -O- https://www.piduino.org/piduino-key.asc | sudo apt-key add -
sudo add-apt-repository 'deb https://apt.piduino.org stretch piduino'
sudo apt update
sudo apt install tty0tty-dkms
for module build is necessary kernel-headers or kernel source:
sudo apt-get update
sudo apt-get install linux-headers-`uname -r`
cd module
make
sudo make install
for debian package:
sudo apt-get install devscripts build-essential lintian
Download the archive file from https://github.com/epsilonrt/tty0tty/archive/v1.3.tar.gz
wget https://github.com/epsilonrt/tty0tty/archive/v1.3.tar.gz
tar xvzf tty0tty-1.3.tar.gz
cd tty0tty-1.3
dpkg-buildpackage
to clean:
dh_clean
for pts build:
cd pts
make
then run with:
./tty0tty
make install set the devices permissions automatically in udev creating the file /etc/udev/rules.d/99-tty0tty.rules with rules:
SUBSYSTEM=="tty", KERNEL=="tnt0", GROUP="dialout", MODE="0660"
SUBSYSTEM=="tty", KERNEL=="tnt1", GROUP="dialout", MODE="0660"
SUBSYSTEM=="tty", KERNEL=="tnt2", GROUP="dialout", MODE="0660"
SUBSYSTEM=="tty", KERNEL=="tnt3", GROUP="dialout", MODE="0660"
SUBSYSTEM=="tty", KERNEL=="tnt4", GROUP="dialout", MODE="0660"
SUBSYSTEM=="tty", KERNEL=="tnt5", GROUP="dialout", MODE="0660"
SUBSYSTEM=="tty", KERNEL=="tnt6", GROUP="dialout", MODE="0660"
SUBSYSTEM=="tty", KERNEL=="tnt7", GROUP="dialout", MODE="0660"
It's possible edit rules and create permanent symbolic names with the parameter SYMLINK:
SUBSYSTEM=="tty", KERNEL=="tnt0", GROUP="dialout", MODE="0660", SYMLINK+="ttyUSB10"
SUBSYSTEM=="tty", KERNEL=="tnt1", GROUP="dialout", MODE="0660", SYMLINK+="ttyUSB11"
The user must be in the dialout group to access the ports. To add your user to dialout group use the command:
sudo usermod -a -G dialout your_user_name
after this is necessary logout and login to group permissions take effect.
To dkms support use the scripts dkms-install.sh and dkms-remove.sh
For e-mail suggestions : [email protected]