how to read from and write to a serial port (ttys0) from another pc via ethernet (eth0) on Ubuntu/Debian???

Question

Well, there are two pc's connected via Wi-Fi and one of those (let's call it A) has a serial port printer (in ttys0) and a measure serial port device (in ttys1) connected too. So B needs to read some values from the mesure device connected on A and then write to the printer connected on A using a network connection.

Answer 1

I don't know if Ubuntu has anything built-in, but you could run a couple of daemons using netcat. Of course, if you want it to be secure, you'd need to do a little more work.

Answer 2

ser2net is a good solution for this

aptitude install ser2net

Then edit the config in /etc/ser2net.conf

You can then make a tcp connection to a defined port and be connected to the serial port on the remote computer - very useful.