I used the com0com and com2tcp
The command line of com2tcp is:
com2tcp.exe --baud 9600 \.\COM55 63950
It worked perfectly, but I need to maintain several tcp connections via one tcp port and connect to one com port, so I tried to use hub4com and its wrapper com2tcp.bat
The command line is:
com2tcp.bat --baud 9600 \.\COM55 63950
And it does not work
Where is my error?