Hello everyone,
I would like to ask for help from someone experienced with RRC setups, especially with Elecraft K3 Twin mode.
I have recently joined a group sharing a remote station. The remote side setup is:
Elecraft K3 + RRC-1258 + K3/0 (Twin mode).
Previously, I successfully used an RRC-Micro + Win4K3 setup.
Now I have purchased an RRC-1258 control unit. I can establish the SIP connection and audio is working, so the basic connection is fine.
However, I cannot get CAT control working between Win4K3 and the remote K3.
I understand that in Twin mode this is not a simple CAT passthrough, but involves K3/0 protocol handling.
On the PC side, I see multiple Microbit virtual COM ports (COM3/4/5). However:
Win4K3 reports the COM port as "in use"
Serial terminal access is blocked when Win4K3 is running
When the port is free, I do not see expected CAT traffic
From what I understand, the RRC expects responses from a local K3/K3/0 (for example PS; commands), and without these responses the remote side eventually drops or shuts down.
I was also provided with a Python script that emulates responses (PS1;), which suggests that K3/0 emulation is required in this setup.
For reference, my RRC firmware version is 2.7.1 with bootloader version 1.9.
My question is:
What is the correct way to provide CAT control for Win4K3 in K3 Twin mode when no physical K3/K3/0 is present on the control side?
Any guidance on correct COM port usage, routing, or required emulation would be greatly appreciated.
Thank you in advance!
Vy73! HA5ATP
