hub4com sets the RTS of the destination port high

Kari Lehtimäki — Sun, 23 Sep 2018 10:38:13 -0000

Hi,

I am trying to use COM3 for two instances of the an application (MMTTY). What the application does is it sets RTS and DTR levels hi/lo to drive my SDR radio. COM3 is a vritual port communicationg with my radio via USB. The two instances seem to be running just fine but for the second one I need to get another COM-port that will be communicate with COM3 like the first instance.

I have created a COM port pair COM7 and COM17 with com0com.

After that I have tried the following commands:
hub4com \.\COM3 \.\COM7 \.\COM17
and
hub4com --odsr=on \.\COM3 \.\COM7 \.\COM17
and
hub4com --fc-route=1:0 \.\COM3 \.\COM17

But every timet he RTS of COM3 goes high right after running the hub4com command. I can see this as my radio starts transmitting and will not stop unless I quit hub4com. I do not even get to start my application (MMTTY).

Any ideas what to try next?

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hub4com sets the RTS of the destination port high