Oh–it’s “Serial” in the 4-pin headers?!? He said Serial2 so that’s what I checked for. But I’d certainly take Serial!
I had a furnace & A/C guy come to the house while I was down in the lab working, so I didn’t get a chance to fully test some things. I also wanted to test my code on a Teensy too, just to “sanity check” it’s behavior there.
Can you reproduce the IDE freeze problem I’m seeing? Try sending characters a bunch of times in the serial monitor text entry field. Then see if the serial monitor (and IDE) locks up either 1) while trying to send additional chars, or 2) when you try to close the serial monitor. Please let me know what you find out.
TB