I have tested on a homebrew transceiver of my creation. I tested on an Arduino Nano and Arduino Nano Every although it should work with any MCU with a serial port. It works with WSJTX in all modes as well as the fldigi suite, Ham Radio Deluxe, the hamlib rigclt command line, and the CatBkt universal rig CAT control tool. It should work with any hamlib enabled software.

The following CAT functions are implemented:

• PTT (SET ON/OFF) or GET PTT state
• VFO A/B Selection
• VFO Swap
• VFO Set A=B
• Split (On/Off)
• Frequency GET/SET
• Mode GET/SET (USB, LSB only)
• S-meter level GET

All other functions are coded to give correct reasonable responses to other CAT commands.

The library methods are fully documented in the header file and a fully working example sketch is supplied.  The example sketch is not a complete radio controller, but it has enough functionality to test CAT control commands from any CAT software - I used it to test with all of the above before integrating in to my rig.

The library takes care of all the protocol handling and communication between your sketch and the CAT controller. Your sketch must provide callback functions to "do the work" of controlling your rig.  An example callback function you need to write is:

#include <IC746.h>
IC746 radio = IC746();

void catSetFreq(long freq) {
 // your code goes here to set your rig freq
}

You register your callback with the library in  your setup() function like this...

radio.addCATFset(catSetFreq);
rado.begin();

and then in your loop you call:
radio.check();

Whenever a CAT command is received your callback function(s) will get invoked.  As I said - it works well with WSJTX, fldigi, Ham Radio Deluxe and anything else I have tried it with.   But then I am only an army of 1! 

I haven't looked at porting to any of the uBitx sketches but I wouldn't think it would be too difficult.

If you download it please let me know.  And if you try it out and find any bugs, please really let me know.

73 and cheers all,

Dean
KK4DAS