Are There Some Program Like Com0Com in Linux

Are there some program like COM0COM in linux?

I found a good method:

socat PTY,link=COM8 PTY,link=COM9

then 2 virtual serial port files are created: COM8, COM9

Are there some program like COM0COM in linux?

I found a good method:

socat PTY,link=COM8 PTY,link=COM9

then 2 virtual serial port files are created: COM8, COM9

Null modem emulator (com0com) for linux

socat -d -d pty,raw,echo=0 pty,raw,echo=0

works just fine and prints:

2014/05/26 13:29:15 socat[27177] N PTY is /dev/pts/32
2014/05/26 13:29:15 socat[27177] N PTY is /dev/pts/33
2014/05/26 13:29:15 socat[27177] N starting data transfer loop with FDs [3,3] and [5,5]

I assume that you should be able to write to /dev/pts/32 and read from /dev/pts/33.

Also is /dev/COM9{8,9} a character device you can use?

ls -l /dev/COM989 

should print a mode which starts with c if that is the case.

Virtual Serial Port for Linux

You can use a pty ("pseudo-teletype", where a serial port is a "real teletype") for this. From one end, open /dev/ptyp5, and then attach your program to /dev/ttyp5; ttyp5 will act just like a serial port, but will send/receive everything it does via /dev/ptyp5.

If you really need it to talk to a file called /dev/ttys2, then simply move your old /dev/ttys2 out of the way and make a symlink from ptyp5 to ttys2.

Of course you can use some number other than ptyp5. Perhaps pick one with a high number to avoid duplicates, since all your login terminals will also be using ptys.

Wikipedia has more about ptys: http://en.wikipedia.org/wiki/Pseudo_terminal

Fake serial communication under Linux

It's probably best to use pyserial to communicate with the serial port, and you can just create a mock version of the serial.Serial class which implements read, readline, write and any other methods you need.

How to connect two virtual serial ports to read data from GPSFeed+?

Steps

• Download gpsfeed+ from https://gpsfeed.sourceforge.io/
• Make executable the file downloaded:

$ chomod +x gpsfeed+_amd64

• Install socat package:

$ sudo pacman -S socat

• Create a pair of virtual serial ports (VSPs) with socat:

$ socat -d -d pty,raw,echo=0 pty,raw,echo=0

• It displays virtual ports created, in this case: /dev/pts/4 and /dev/pts/5. One port will be transmitter and the another one will be the receiver.
• Open gpsfeed+ application:

$ ./gpsfeed+_amd64\

• In Configuration for gpsfeed+ to do:

1. Connection >> check: Serial, and uncheck: TCP, UDP, Http
2. Serial/IP >> Port: /dev/pts/4 (transmitter), and Speed: 9600

• Run simulator (button with a concentric circle as icon)
• Read data from /dev/pts/5 (receiver)

Python code (install pyserial package):

import serial

ser = serial.Serial('/dev/pts/5', 9600)
iter = 5

while iter > 0:
  print(ser.readline().decode("utf-8"))
  iter -= 1

The very few existing packages for Dart (like dart_serial_port) do not work with virtual ports.

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