Is there a way to use a linked serial port pair with an Arduino Uno? I am trying to retrieve frequency data from the application SDRUno, which works with an SDR receiver called an SDRPlay RSP1A. The data is exchanged using the Computer Aided Transceiver (CAT) protocol, developed for use with amateur radio transceivers. The SDRUno User Manual specifies that in order to exchange info, the SDRUno application must be assigned to one serial port in a linked pair, and the requesting device is assigned to the other linked port. However, I can't find a way to get the Arduino to work with a linked serial port.
You have to create the linked pair with third party software. I am able to assign the Arduino to one of the linked serial ports using the IDE tools, but when I try to upload my sketch, I get an error message saying that the port is already open or in use by another device. It appears that the Arduino will only work with a serial port that is assigned to it when the USB cable is attached. I have tried deleting the automatically assigned port and then assigning the Arduino to a linked serial port, but I get the same error message.
If anyone knows how to get the Arduino to accept assignment to a linked serial port I would greatly appreciate your assistance!!