Thank you for the your reply and suggestions, Rongzhong Li. I know you are super busy still fulfilling orders.
As requested, I'm sending some additional information.
- Yes, 0000 works with BittleSPP* in the device list of my last post. It pairs but never connects (the bluetooth LED continues to blink). So the new port never appears in Arduino IDE. I do, however, see the new blutetooth device in Device Manager.
- This morning, something new happened and two bluetooth COM ports appeared in Device Manager and are recognized in Arduino IDE, which is promising! This while still only showing as paired, not connected, and LED is still blinking. (I am still not understanding why I have 2 Bittle bluetooth devices showing up. Is that normal?)
I did a little more investigating and it looks like COM6 is related to BittleSPP* (COM4 then is for BittleBLE* which is unstable).
😮....I just uploaded OpenCat.ino and while it was uploading the bluetooth LED stopped blinking and turned a solid red. The Serial Monitor looks like this:
...and just like that, the commands are working via bluetooth. I promise this wasn't behaving this way in the last 2 days, but I do realize I've already learned a lot in that time so perhaps I "fixed" something along the way somehow. So sorry. Hopefully, others find this useful.
I'm going to take another look at IRremote now that bluetooth is working to see if that too has "fixed" itself overnight.