Arduino Com port has disappeared

userHead Tempest8008 2018-01-12 02:34:09 17541 Views15 Replies
It was working fine earlier today.
I was playing around with some serial communications Sketches and all of a sudden the com port (com11 on this LP) disappeared and won't come back.

Some background:

I'm working on making this board do several things. I have a daughter board that is connected via USB that has an LTE Modem device as well as a GPIO (GPS) device on it. The modem is using Com ports 4, 6, and 7. The GPS is running off of port 5.

Com1 is the only other port available.

Any suggestions on troubleshooting steps I can use to reconnect to the on-board Arduino? I want to use the pinouts for status LEDs, so was playing around with different blink Sketches. I want to write to those pins from a C# application, and was figuring simple serial comms where I fire single digits to the Arduino where the Sketch would translate them into commands would be the way to go. In retrospect there are probably better ways, but I'll get it figured out.

If my Arduino board on his LattePanda will ever talk to me again.

Thanks (in advance).