The communication on COM0 is a proprietary protocol between the radio and its control panel/head.
In order to use the radio for control, you need to use the separate CAT over COM2. This is different
from radio to radio, for example on Icom you can use COM0 for CAT. That is why he baud rate is fixed
on COM0 and flexible on COM2 (but must match the radio's CAT setting).
The cable on the control RRC's COM2 is a normal straight through serial cable, which many people have
in a drawer somewhere. If you don't have one, just use the RRC's built-in USB to serial converter and take
COM2 off of USB instead. This works just fine with HRD and other control software.
I included my TS-480 CAT checklist below that may help. However, it is really very easy. Like I said before,
if nano works, then I see the problem on the control side.
73,
Mitch DJ0QN / K7DX
CAT CHECKLIST
---------------------
IMPORTANT: In both scenarios, you MUST first install a standard serial cable between the TS-480 body and COM2 of the radio RRC!
USING A STANDARD SERIAL CABLE
============================
1) Change the CAT rate on the TS-480 to (for example) 4800 baud (menu 56). This rate keeps traffic over the internet to a minimum and faster is not necessary for CAT, but you can of course run at a faster speed if you want to.
2) Change the COM2 serial settings of the radio-RRC to mode-4, 4800 baud, data bits 8, stop bits 1 and submit/apply changes.
3) Change the COM2 serial settings of the control-RRC to mode-4, 4800 baud, data bits 8, stop bits 1 and submit/apply changes.
4) Plug a serial cable in between your PC and the control-RRC COM2
5) Set your software to use the correct COM port on your PC at 4800-8-1-N
USING A USB CABLE
=================
1) Change the CAT rate on the TS-480 to (for example) 4800 baud (menu 56). This rate keeps traffic over the internet to a minimum and faster is not necessary for CAT, but you can of course run at a faster speed if you want to.
2) Change the COM2 serial settings of the radio-RRC to mode-4, 4800 baud, data bits 8, stop bits 1 and submit/apply changes.
3) Install the Microbit Setup Manager if you already haven't. You don't need the problem for this, but this installs the correct drivers on your PC.
4) Change the COM2 serial settings of the control-RRC to mode-4, 4800 baud, data bits 8, stop bits 1, "use USB Com Port as COM2" to "Yes" and submit/apply changes.
5) Plug a USB cable between your PC and control-RRC. Make sure you do NOT do his before step 3 above!
6) Find out the correct port in your Windows Device Manager to use by looking for the "Microbit RRC Virtual COM Port (COM2)"
7) Set your software to use the this COM port on your PC at 4800-8-1-N.