I have had the Arduino Version 11 IDE up and running for about a week,
but last night I noticed that the required COM port (COM4 is the OUT
and COM5 is the input) was not listed via the Tools menu for the
Arduino BT board. COM5 was listed, however.
I checked in the Control panel to make sure that the
Arduino BT was still paired with my PC (which uses a USB Bluetooth Dongle).
It was. Also, I went into Device Manager and it showed no issues with
COM4 and COM5 being set up as serial ports for Bluetooth communication.
Any ideas, or past experiences, on why the IN port (COM4 for me) is not
showing up in the IDE?