Simulate serial device with pty's
 

Hi,

I wrote software which access and reads a serial device. I would like to test this software on my computer without loop-wiring or without a second computer.

How could I use pty's to simulate a serial device?

Actually I would like to temporary replace the /dev/ttyS1 file by one end of the pty. How could I do this? Is there a command to create a pty pair?

Thanks for any suggestions.

The pairs are already there. Hope that the below gives you the idea what to do.

Run this first in a terminal; it will simulate your serial port
Next, in other terminal, let your application connect to it (I use minicon but you can use your application)

Thanks Wim,

The pty pair doesn't exist on my computer. Is there a command to create such a pty pair??

In the folder /dev/pts/ there are plenty of pty ports. But the all end up in open terminal session.

For me it worked long ago under RH7.x (or maybe it was even 6.2). I did check before I posted on my Ubuntu 8.04 box.

I can't find the links any more ( :( ) but there seem to be two styles. Maybe do a search for pmtx.

Which distro are you using?

Hi,

I'm using Linux Mint Gloriqa (Linux Ubunut 8.0 Derivat).
The two devices /dev/ptyp0 and /dev/ttyp0 don't exist.

There is a application called socat which can create to pseudo terminals.

With this app I'm able to create a pair of ptys.