Converting serial port data to TCP IP in a Linux environment

Question

I need to get data from the serial port of a Linux system and convert it to TCP IP to send to a server  Is this difficult to do  I have some basic programming experience  but not much experience with Linux  Is there an open source application that do this

User · Answer

All the tools you would need are already available to you on most modern distributions of Linux.

As several have pointed out you can pipe the serial data through netcat. However you would need to relaunch a new instance each time there is a connection. In order to have this persist between connections you can create a xinetd service using the following configuration:

service testservice
{
    port        = 5900
    socket_type = stream
    protocol    = tcp
    wait        = yes
    user        = root
    server      = /usr/bin/netcat
    server_args = "-l 5900 < /dev/ttyS0"
}

Be sure to change the /dev/ttyS0 to match the serial device you are attempting to interface with.

User · Answer

All the tools you would need are already available to you on most modern distributions of Linux.

As several have pointed out you can pipe the serial data through netcat. However you would need to relaunch a new instance each time there is a connection. In order to have this persist between connections you can create a xinetd service using the following configuration:

service testservice
{
    port        = 5900
    socket_type = stream
    protocol    = tcp
    wait        = yes
    user        = root
    server      = /usr/bin/netcat
    server_args = "-l 5900 < /dev/ttyS0"
}

Be sure to change the /dev/ttyS0 to match the serial device you are attempting to interface with.

User · Answer

I think your question isn t quite clear  There are several answers here on how to catch the data coming into a Linux s serial port  but perhaps your problem is the other way around   If you need to catch the data coming out of a Linux s serial port and send it to a server  there are several little hardware gizmos that can do this  starting with the simple serial print server such as this Lantronix gizmo   No  I m not affiliated with Lantronix in any way

User · Answer

I have been struggling with the problem for a few days now   The problem for me originated with VirtualBox Ubuntu  I have lots of USB serial ports on my machine  When I tried to assign one of them to the VM it clobbered all of them - i e  the host and other VMs were no longer able to use their USB serial devices   My solution is to set up a stand-alone serial server on a netbook I happen to have in the closet   I tried ser2net and it worked to put the serial port on the wire  but remtty did not work  I need to get the port as a tty on the VM   socat worked perfectly   There are good instructions here   Example for remote tty  tty over TCP  using socat

User · Answer

You can create a serial-over-LAN  SOL  connection by using socat  It can be used to  forward  a ttyS to another machine so it appears as a local one or you can access it via a TCP IP port

User · Answer

I think your question isn t quite clear  There are several answers here on how to catch the data coming into a Linux s serial port  but perhaps your problem is the other way around   If you need to catch the data coming out of a Linux s serial port and send it to a server  there are several little hardware gizmos that can do this  starting with the simple serial print server such as this Lantronix gizmo   No  I m not affiliated with Lantronix in any way

User · Answer

You don t need to write a program to do this in Linux  Just pipe the serial port through netcat   netcat www example com port  lt  dev ttyS0  gt  dev ttyS0   Just replace the address and port information  Also  you may be using a different serial port  i e  change the  dev ttyS0 part   You can use the stty or setserial commands to change the parameters of the serial port  baud rate  parity  stop bits  etc

User · Answer

You don t need to write a program to do this in Linux  Just pipe the serial port through netcat   netcat www example com port  lt  dev ttyS0  gt  dev ttyS0   Just replace the address and port information  Also  you may be using a different serial port  i e  change the  dev ttyS0 part   You can use the stty or setserial commands to change the parameters of the serial port  baud rate  parity  stop bits  etc

User · Answer

I think your question isn t quite clear  There are several answers here on how to catch the data coming into a Linux s serial port  but perhaps your problem is the other way around   If you need to catch the data coming out of a Linux s serial port and send it to a server  there are several little hardware gizmos that can do this  starting with the simple serial print server such as this Lantronix gizmo   No  I m not affiliated with Lantronix in any way

User · Answer

I stumbled upon this question via a Google search for a very similar one  using the serial port on a server from a Linux client over TCP IP   so  even though this is not an answer to exact original question  some of the code might be useful to the original poster  I think    Making a Linux box with a serial port listen on the TCP port to share the modem  ser2net Using this  shared  modem from another Linux workstation  remtty

User · Answer

Open a port in your server with netcat and start listening   nc -lvp port number   And on the machine you are reading the serial port  send it with netcat as root   nc  lt IP address gt  portnumber  lt   dev ttyACM0   If you want to store the data on the server you can redirect the data to a text file   First create a file where you are saving the data   touch data txt   And then start saving data  nc -lvp port number  gt  data txt

User · Answer

You might find Perl or Python useful to get data from the serial port  To send data to the server  the solution could be easy if the server is  let s say  an HTTP application or even a popular database  The solution would be not so easy if it is some custom proprietary TCP application

User · Answer

I have been struggling with the problem for a few days now   The problem for me originated with VirtualBox Ubuntu  I have lots of USB serial ports on my machine  When I tried to assign one of them to the VM it clobbered all of them - i e  the host and other VMs were no longer able to use their USB serial devices   My solution is to set up a stand-alone serial server on a netbook I happen to have in the closet   I tried ser2net and it worked to put the serial port on the wire  but remtty did not work  I need to get the port as a tty on the VM   socat worked perfectly   There are good instructions here   Example for remote tty  tty over TCP  using socat

User · Answer

I stumbled upon this question via a Google search for a very similar one  using the serial port on a server from a Linux client over TCP IP   so  even though this is not an answer to exact original question  some of the code might be useful to the original poster  I think    Making a Linux box with a serial port listen on the TCP port to share the modem  ser2net Using this  shared  modem from another Linux workstation  remtty

User · Answer

I think your question isn t quite clear  There are several answers here on how to catch the data coming into a Linux s serial port  but perhaps your problem is the other way around   If you need to catch the data coming out of a Linux s serial port and send it to a server  there are several little hardware gizmos that can do this  starting with the simple serial print server such as this Lantronix gizmo   No  I m not affiliated with Lantronix in any way

User · Answer

Open a port in your server with netcat and start listening   nc -lvp port number   And on the machine you are reading the serial port  send it with netcat as root   nc  lt IP address gt  portnumber  lt   dev ttyACM0   If you want to store the data on the server you can redirect the data to a text file   First create a file where you are saving the data   touch data txt   And then start saving data  nc -lvp port number  gt  data txt

User · Answer

You don t need to write a program to do this in Linux  Just pipe the serial port through netcat   netcat www example com port  lt  dev ttyS0  gt  dev ttyS0   Just replace the address and port information  Also  you may be using a different serial port  i e  change the  dev ttyS0 part   You can use the stty or setserial commands to change the parameters of the serial port  baud rate  parity  stop bits  etc

User · Answer

I had the same problem   I m not quite sure about open source applications  but I have tested command line Serial over Ethernet for Linux and    it works for me   Also thanks to Judge Maygarden for the instructions

User · Answer

You don t need to write a program to do this in Linux  Just pipe the serial port through netcat   netcat www example com port  lt  dev ttyS0  gt  dev ttyS0   Just replace the address and port information  Also  you may be using a different serial port  i e  change the  dev ttyS0 part   You can use the stty or setserial commands to change the parameters of the serial port  baud rate  parity  stop bits  etc

User · Answer

You can create a serial-over-LAN  SOL  connection by using socat  It can be used to  forward  a ttyS to another machine so it appears as a local one or you can access it via a TCP IP port

User · Answer

You might find Perl or Python useful to get data from the serial port  To send data to the server  the solution could be easy if the server is  let s say  an HTTP application or even a popular database  The solution would be not so easy if it is some custom proprietary TCP application

User · Answer

You might find Perl or Python useful to get data from the serial port  To send data to the server  the solution could be easy if the server is  let s say  an HTTP application or even a popular database  The solution would be not so easy if it is some custom proprietary TCP application

User · Answer

I had the same problem   I m not quite sure about open source applications  but I have tested command line Serial over Ethernet for Linux and    it works for me   Also thanks to Judge Maygarden for the instructions

User · Answer

You might find Perl or Python useful to get data from the serial port  To send data to the server  the solution could be easy if the server is  let s say  an HTTP application or even a popular database  The solution would be not so easy if it is some custom proprietary TCP application

[linux] Converting serial port data to TCP/IP in a Linux environment

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